1.
USS Somers (DD-381)
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USS Somers was a destroyer commissioned in the United States Navy from 1937 to 1945. She was the ship of the Somers-class of destroyer leaders and was named for Richard Somers. During World War II, Somers was active in the South Atlantic, the North Atlantic, though active for only eight years she acquired an enviable record. In 1938 she transported a consignment of gold from the Bank of England to New York, on 6 November 1941, she and the cruiser USS Omaha captured the German freighter Odenwald which was carrying 3800 tons of scarce rubber while disguised as the American merchantman Willmoto. Odenwald was taken to Puerto Rico, an admiralty court ruled that since the ship was illegally claiming American registration, there were sufficient grounds for confiscation. A legal case was started claiming that the crews of the two American ships had salvage rights because the Odenwald crews attempt to scuttle the ship was the equivalent of abandoning her and this was the last prize money awarded by the US Navy. In November 1942 Somers, with USS Milwaukee and USS Cincinnati, intercepted another German blockade runner, at the end of the month Somers relocated to Dakar, Senegal and assisted in escorting the Free French warships Richelieu and Montcalm to the United States. By March Somers was based in Trinidad on patrols to Brazil as before, on New Years Day 1944 Somers intercepted the German blockade runner Westerland, which scuttled itself. In May Somers escorted a convoy to England as part of the buildup for the Normandy invasion. Somers next participated in the invasion of Normandy as an escort and, in August. On 15 August 1944, four hours before H-Hour, D-Day, along the French Riviera, Somers encountered and sank the German corvette UJ6081, following this action, she moved inshore to give gunfire support to the invasion. For two days she bombarded enemy strongpoints off the coast near Toulon with 5 inch shells and then exchanged fire with shore batteries east of Marseilles. Although Somers sustained many hits during this action, she emerged the victor, for the next month, the destroyer operated in the Mediterranean Sea, visiting ports on the southern coast of France, Ajaccio, Corsica, and Oran, Algeria. She steamed out of Oran on 28 September and arrived in New York on 8 October, Somers was overhauled at the Brooklyn Navy Yard until 8 November, then moved to Casco Bay, Maine, for training. On 23 November, she joined the screen of a Britain bound convoy for the first of four transatlantic voyages which closed Somers combat service and she returned to the United States on 12 May 1945 at the end of her last voyage to the United Kingdom. For the remainder of the war, Somers operated along the seaboard and, in July. On 4 August 1945, she put into Charleston, South Carolina, for overhaul, instead of returning to active duty, Somers reported to the Commandant, 6th Naval District, for decommissioning and disposal. She decommissioned at Charleston on 28 October 1945 and was retained there until removed by her purchaser, Boston Metals of Baltimore, Somers was struck from the Navy list on 28 January 1947
2.
Federal Shipbuilding and Drydock Company
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The Federal Shipbuilding and Drydock Company was a United States shipyard, active from 1917 to 1948. It was founded during World War I to build ships for the United States Shipping Board, during World War II, it built ships as part of the U. S. The shipyard site is now part of River Terminal, a distribution facility that is partially a foreign trade zone. Federal built numerous destroyers, destroyer escorts and a handful of light cruisers as well as merchant ships during, around 570 vessels were contracted for construction by Federal SB&DD Company with about 100 not delivered fully completed due to the end of the World War II. Federal also had a yard at Port Newark during World War II that built destroyers, Federal Shipbuilding and Dry Dock Company was founded July 24,1917 as a subsidiary of United States Steel Corporation to supply ships for the United States Shipping Board during World War I. The site on Kearny Point was first surveyed during the summer of 1917, the shipyard was to consist of everything needed to fully complete a ship from a facility power plant to a wood joining shop. A steel plate mill and boiler shop were to be built as well, $10 million was allocated for construction. The American Bridge Company was contracted to provide 10,000 tons of steel for the structures, gary was president of Federal in August 1917. The ship-ways were completed by the fall of 1917 with keels being laid by November 1917, Federal completed a 9,600 ton ship around six weeks before World War I ended as well as two other ships before the close of 1918. 27 ships were delivered to the Emergency Fleet Corporation in 1919, Federal accounted for 5% of the steel merchant tonnage built in 1919. By June 1921, the Federal yard at Kearny had a 535 by 161.5 feet boiler construction shop to build Scotch marine boilers, exhaust stacks, tanks, uptakes,235 boilers had been constructed from September 1919 to June 1921. Boilers constructed there were mostly 15 feet diameter or larger, at that time,250 men were able to construct three boilers a week with a single 8 hour shift each day. By November 1921, Federal had shipbuilding ways for twelve 15,000 ton vessels and had constructed a 9,000 ton floating dry dock, the dry dock was first used June 23,1921 when Transmarine corps SS Suhulco docked. The Kearny yard was 17 acres with 2,400 feet of frontage on the Hackensack River, a wet basin was located at the southern end with a 100-ton 3-legged jib crane for fitting out new ships. On Sunday night, May 18,1924, a fire destroyed the largest building at the Kearny yard causing an initially estimated $500,000 in damage, other estimates were $1.6 million or as high as several million dollars in damage. Firemen used four mobile cranes to try to extinguish fires in the pattern building, over a thousand workers were idled by the fire. The shipyard had around 5,000 workers at the time and was said to be one of the largest steel plants in the world. Fireboats and numerous firemen from around the area were called in to fight the fire spread rapidly through the wooden structures at the Kearny yard
3.
Bath Iron Works
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Bath Iron Works is a major American shipyard located on the Kennebec River in Bath, Maine. Since its founding in 1884, BIW has built private, commercial and military vessels, the shipyard has built and sometimes designed battleships, frigates, cruisers and destroyers, including the Arleigh Burke class, which are currently among the worlds most advanced surface warships. Since 1995, Bath Iron Works has been a subsidiary of General Dynamics, during World War II, ships built at BIW were considered by sailors and Navy officials to be of superior toughness, giving rise to the phrase Bath-built is best-built. Bath Iron Works was incorporated in 1884 by General Thomas W. Hyde, after the war, Hyde bought a local shop that helped make windlasses and other iron hardware for the wooden ships built in Baths many shipyards. He expanded the business by improving its practices, entering new markets, by 1882, Hyde Windlass was eyeing the new and growing business of iron shipbuilding, two years later, it incorporated as Bath Iron Works. On February 28,1890, BIW won its first contract for complete vessels, the Machias, one of these 190-foot gunboats, was the first ship launched by the company. In 1892, the yard won its first commercial contract for a steel vessel, in the 1890s, the company built several yachts for wealthy sailors. In 1899, General Hyde, suffering from the Brights Disease that would kill him later that year, resigned from management of the shipyard, leaving his sons Edward and that year the shipyard began construction of the Georgia, the only battleship to be built in Bath. The ship dominated the yard for five years until its launching in 1904, the yard faced numerous challenges because of the weight of armor and weapons. In sea trials, the Georgia averaged 19.26 knots for four hours, making her the fastest ship in her class, the company continued to rely on Navy contracts, which provided 86% of the value of new contracts between 1905 and 1917. The yard also produced fishing trawlers, freighters, and yachts throughout the first half of the century, at peak production during World War II, the shipyard launched a destroyer every 17 days. Bath Iron Works ranked 50th among United States corporations in the value of World War II military production contracts, in 1981, Falcon Transport ordered two tankers, the last commercial vessels built by BIW. In 1988, the USS Samuel B, Roberts, commissioned two years earlier at Bath, survived a mine explosion that tore a hole in its engine room and flooded two compartments. Over the next two years, BIW repaired the Roberts in unique fashion, the guided missile frigate was towed to the companys dry dock in Portland, Maine, and put up on blocks, where its damaged engine room was cut out of the ship. Meanwhile, workers in Bath built a 315-ton replacement, when it was ready, the module was floated south to Portland, placed on the dry dock, slid into place under the Roberts, jacked up, and welded into place. In 2001, BIW wrapped up an effort to build an enormous concrete platform. Instead of being built on a way so that they could slide into the Kennebec at launch. This greatly reduced the work involved in building and launching the ships, the 750-foot,28, 000-ton dry dock was built by Chinas Jiangdu Yuchai Shipbuilding Company for $27 million
4.
Bagley-class destroyer
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The Bagley class of eight destroyers was built for the United States Navy. They were part of a series of USN destroyers limited to 1,500 tons standard displacement by the London Naval Treaty, All eight ships were ordered and laid down in 1935 and subsequently completed in 1937. They retained the fuel-efficient power plants of the Mahan-class destroyers, however, they had the extended range of the Mahans,1,400 nautical miles farther than the Gridleys. The Bagley class destroyers were readily distinguished visually by the prominent external trunking of the boiler uptakes around their single stack, All eight Bagley-class destroyers were present at the attack on Pearl Harbor on 7 December 1941. They all served in the Pacific during World War II, with Jarvis, Blue, in 1944 Mugford suffered extensive damage from a kamikaze hit that put her out of combat for six months. Ralph Talbot later received a hit off Okinawa. After the war, Bagley, Helm, and Patterson were decommissioned in 1945, Mugford and Ralph Talbot, still in commission, were targets during the Operation Crossroads atomic bomb tests at Bikini atoll in 1946. Contaminated by radiation, they were scuttled off Kwajalein in 1948, the eight Bagleys were part of a series of three classes with similar characteristics laid down 1935-1937. The other two were the Gridley class and the Benham class, All three featured four 5 inch dual purpose guns and sixteen 21 inch torpedo tubes in four quadruple mounts as built, the largest number of torpedo tubes on any US destroyers. Although all had only one stack, they differed primarily in their machinery, the Gridleys were designed by Bethlehem Shipbuilding Company with advanced high-pressure boilers but turbines generally similar to the earlier Farragut class, which limited their range. The Benhams were a Gibbs & Cox design with new boiler design that allowed a reduction from four boilers to three, with an efficient turbine arrangement resembling the Mahans. The Bagleys propulsion plant repeated that of the Mahans, steam pressure was 400 psi, superheated to 700 °F. Features that improved fuel economy included boiler economizers, double reduction gearing, the ships range was 6,940 nmi at 12 knots,1,400 nmi farther than the Gridleys. The engines developed 47,191 shp on Bagleys trials, the main turbines were manufactured by General Electric. Steam from the boilers was supplied to the HP turbine, which exhausted to the LP turbine, the Bagleys had the same armament as the Gridleys and Benhams, four 5 inch dual purpose guns in single mounts and sixteen 21 inch torpedo tubes in quadruple mounts. The class was equipped with the Mark 11 torpedo or Mark 12 torpedo. This was the heaviest armament in torpedoes ever on US destroyers, compared with the Mahans, they sacrificed one gun for four additional torpedo tubes. It was suggested that these ships could use curved ahead fire, as with most other US destroyers of this period, the 5 inch guns featured all-angle power loading and were director controlled, making them as effective as the technology allowed against aircraft
5.
Benham-class destroyer
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The Benham class of ten destroyers was built for the United States Navy. They were part of a series of USN destroyers limited to 1,500 tons standard displacement by the London Naval Treaty, the class was laid down in 1936-1937 and all were commissioned in 1939. Much of their design was based on the immediately preceding Gridley, like these classes, the Benhams were notable for including sixteen 21-inch torpedo tubes, the heaviest torpedo armament ever on US destroyers. They introduced a new boiler that saved space and weight. The class served extensively in World War II in the Atlantic, Mediterranean, the ten Benhams were part of a series of three classes with similar characteristics laid down 1935-1937. The other two were the Gridley class and the Bagley class, All three featured four 5-inch dual purpose guns and sixteen 21-inch torpedo tubes in four quadruple mounts as built, the largest number of torpedo tubes on any US destroyers. Although all had only one stack, they differed primarily in their machinery, the Benhams were a Gibbs & Cox design with a new high-pressure boiler design that allowed a reduction from four boilers to three, with an efficient turbine arrangement resembling the Mahans. The Gridleys were designed by Bethlehem Shipbuilding Company with advanced high-pressure boilers but turbines generally similar to the earlier Farragut class, except for the 1850-ton Somers class, the Benhams propulsion plant was the most advanced yet installed in US destroyers. A new Babcock & Wilcox boiler design was used that allowed a reduction from four boilers to three, saving space and weight. Steam pressure was increased from 400 psi to 600 psi, superheated to 700 °F as in the Gridleys, features that improved fuel economy included boiler economizers, double reduction gearing, and cruising turbines. Range was somewhat less than in the Bagleys at 5,390 nmi versus 6,940 nmi, the main turbines developed 49,250 shp on Benhams trials and were manufactured by Westinghouse. The Benhams had the armament as the Gridleys and Bagleys, four 5-inch/38 caliber dual purpose guns in single mounts. The Mark 15 torpedo was equipped and this was the heaviest armament in torpedoes ever on US destroyers. Compared with the Mahans, they sacrificed one gun for four additional torpedo tubes and it was suggested that these ships could use curved ahead fire, using the adjustable post-launch gyro angle of their torpedoes to launch a sixteen-torpedo spread ahead of the ship. As with most other US destroyers of this period, the 5-inch guns featured all-angle power loading and were director controlled, by late 1942, radio proximity fuses made them much more effective. As in the last two Maurys, the two forward 5-inch guns were in enclosed mounts, while the guns were open. However, in the Benhams, the two mounts were a Mark 30 Mod 1 base-ring type with an integral ammunition hoist fed from a handling room below each gun. In common with all US surface combatants in the 1930s, the as-built light AA armament was weak and it was apparently felt that the heavy AA armament would shoot down most incoming aircraft in all situations, but the attack on Pearl Harbor showed that this was not true
6.
Destroyer
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Before World War II, destroyers were light vessels with little endurance for unattended ocean operations, typically a number of destroyers and a single destroyer tender operated together. After the war, the advent of the missile allowed destroyers to take on the surface combatant roles previously filled by battleships. This resulted in larger and more powerful guided missile destroyers more capable of independent operation, the emergence and development of the destroyer was related to the invention of the self-propelled torpedo in the 1860s. A navy now had the potential to destroy an enemy battle fleet using steam launches to launch torpedoes. Fast boats armed with torpedoes were built and called torpedo boats, the first seagoing vessel designed to fire the self-propelled Whitehead torpedo was the 33-ton HMS Lightning in 1876. She was armed with two drop collars to launch these weapons, these were replaced in 1879 by a torpedo tube in the bow. By the 1880s, the type had evolved into small ships of 50–100 tons, in response to this new threat, more heavily gunned picket boats called catchers were built which were used to escort the battle fleet at sea. The anti-torpedo boat origin of this type of ship is retained in its name in other languages, including French, Italian, Portuguese, Czech, Greek, Dutch and, up until the Second World War, Polish. At that time, and even into World War I, the function of destroyers was to protect their own battle fleet from enemy torpedo attacks. The task of escorting merchant convoys was still in the future, an important development came with the construction of HMS Swift in 1884, later redesignated TB81. This was a torpedo boat with four 47 mm quick-firing guns. At 23.75 knots, while still not fast enough to engage torpedo boats reliably. Another forerunner of the torpedo boat destroyer was the Japanese torpedo boat Kotaka, designed to Japanese specifications and ordered from the London Yarrow shipyards in 1885, she was transported in parts to Japan, where she was assembled and launched in 1887. The 165-foot long vessel was armed with four 1-pounder quick-firing guns and six torpedo tubes, reached 19 knots, in her trials in 1889, Kotaka demonstrated that she could exceed the role of coastal defense, and was capable of accompanying larger warships on the high seas. The Yarrow shipyards, builder of the parts for the Kotaka, the first vessel designed for the explicit purpose of hunting and destroying torpedo boats was the torpedo gunboat. Essentially very small cruisers, torpedo gunboats were equipped with torpedo tubes, by the end of the 1890s torpedo gunboats were made obsolete by their more successful contemporaries, the torpedo boat destroyers, which were much faster. The first example of this was HMS Rattlesnake, designed by Nathaniel Barnaby in 1885, the gunboat was armed with torpedoes and designed for hunting and destroying smaller torpedo boats. Exactly 200 feet long and 23 feet in beam, she displaced 550 tons, built of steel, Rattlesnake was un-armoured with the exception of a 3⁄4-inch protective deck
7.
Water-tube boiler
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A watertube boiler is a type of boiler in which water circulates in tubes heated externally by the fire. Fuel is burned inside the furnace, creating hot gas which heats water in the steam-generating tubes, in smaller boilers, additional generating tubes are separate in the furnace, while larger utility boilers rely on the water-filled tubes that make up the walls of the furnace to generate steam. The heated water rises into the steam drum. Here, saturated steam is drawn off the top of the drum, in some services, the steam will reenter the furnace through a superheater to become superheated. Superheated steam is defined as steam that is heated above the point at a given pressure. Superheated steam is a dry gas and therefore used to drive turbines, cool water at the bottom of the steam drum returns to the feedwater drum via large-bore downcomer tubes, where it pre-heats the feedwater supply. To increase economy of the boiler, exhaust gases are used to pre-heat the air blown into the furnace. Such watertube boilers in thermal power stations are called steam generating units.4 MPa. A water tube boiler was patented by Blakey of England in 1766 and was made by Dallery of France in 1780. e, approximately 16 megapascals and high temperatures reaching up to 550 °C are generally required. For example, the Ivanpah solar-power station uses two Rentech Type-D watertube boilers, modern boilers for power generation are almost entirely water-tube designs, owing to their ability to operate at higher pressures. Where process steam is required for heating or as a chemical component and their ability to work at higher pressures has led to marine boilers being almost entirely water-tube. This change began around 1900, and traced the adoption of turbines for propulsion rather than reciprocating engines – although watertube boilers were used with reciprocating engines. There has been no significant adoption of water-tube boilers for railway locomotives, a handful of experimental designs were produced, but none of these were successful or led to their widespread use. Most water-tube railway locomotives, especially in Europe, used the Schmidt system, most were compounds, and a few uniflows. The Norfolk and Western Railways Jawn Henry was an exception, as it used a steam turbine combined with an electric transmission, LMS6399 Fury Rebuilt completely after a fatal accident LNER10000 Hush hush Using a Yarrow boiler, rather than Schmidt. Never successful and re-boilered with a conventional boiler, a slightly more successful adoption was the use of hybrid water-tube / fire-tube systems. As the hottest part of a boiler is the firebox, it was an effective design to use a water-tube design here. One famous example of this was the USA Baldwin 4-10-2 No, operating as a compound at a boiler pressure of 2,400 kilopascals it covered over 160,000 kilometres successfully
8.
General Electric
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General Electric, often abbreviated as GE, is an American multinational conglomerate corporation incorporated in New York and headquartered in Boston, Massachusetts. In 2011, GE ranked among the Fortune 500 as the 68th-largest firm in the U. S. by gross revenue, as of 2012, the company was listed the fourth-largest in the world among the Forbes Global 2000, further metrics being taken into account. The Nobel Prize has twice been awarded to employees of General Electric, Irving Langmuir in 1932, on January 13,2016, it was announced that GE will be moving its corporate headquarters from Fairfield, Connecticut to the South Boston Waterfront neighborhood of Boston, Massachusetts. The first group of workers arrived in the summer of 2016, morgan and the Vanderbilt family for Edisons lighting experiments. The new company also acquired Sprague Electric Railway & Motor Company in the same year, both plants continue to operate under the GE banner to this day. The company was incorporated in New York, with the Schenectady plant used as headquarters for years thereafter. Around the same time, General Electrics Canadian counterpart, Canadian General Electric, was formed, in 1896, General Electric was one of the original 12 companies listed on the newly formed Dow Jones Industrial Average. After 120 years, it is the one of the original companies still listed on the Dow index. In 1911, General Electric absorbed the National Electric Lamp Association into its lighting business, GE established its lighting division headquarters at Nela Park in East Cleveland, Ohio. Nela Park is still the headquarters for GEs lighting business, owen D. Young, through GE, founded the Radio Corporation of America in 1919 to further international radio. GE used RCA as its retail arm for radio sales from 1919, in 1927, Ernst Alexanderson of GE made the first demonstration of his television broadcasts at his General Electric Realty Plot home at 1132 Adams Rd, Schenectady, NY. The sound was broadcast on GEs WGY, experimental television station W2XAD evolved into station WRGB which—along with WGY and WGFM —was owned and operated by General Electric until 1983. GEs history of working with turbines in the field gave them the engineering know-how to move into the new field of aircraft turbosuperchargers. Led by Sanford Alexander Moss, GE introduced the first superchargers during World War I, superchargers became indispensable in the years immediately prior to World War II, and GE was the world leader in exhaust-driven supercharging when the war started. This experience, in turn, made GE a natural selection to develop the Whittle W.1 jet engine that was demonstrated in the United States in 1941, GE ranked ninth among United States corporations in the value of wartime production contracts. In 2002, GE acquired the assets of Enron during its bankruptcy proceedings. Some consumers boycotted GE light bulbs, refrigerators and other products in the 1980s and 1990s to protest GEs role in weapons production. With IBM, Burroughs, NCR, Control Data Corporation, Honeywell, RCA and UNIVAC, GE had a line of general purpose and special purpose computers
9.
Gear
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A gear or cogwheel is a rotating machine part having cut teeth, or cogs, which mesh with another toothed part to transmit torque. Geared devices can change the speed, torque, and direction of a power source, Gears almost always produce a change in torque, creating a mechanical advantage, through their gear ratio, and thus may be considered a simple machine. The teeth on the two meshing gears all have the same shape, two or more meshing gears, working in a sequence, are called a gear train or a transmission. A gear can mesh with a linear toothed part, called a rack, the gears in a transmission are analogous to the wheels in a crossed, belt pulley system. An advantage of gears is that the teeth of a gear prevent slippage, in transmissions with multiple gear ratios—such as bicycles, motorcycles, and cars—the term gear as in first gear refers to a gear ratio rather than an actual physical gear. The term describes similar devices, even when the ratio is continuous rather than discrete, or when the device does not actually contain gears. Early examples of gears date from the 4th century BC in China, examples of further development include, Ma Jun used gears as part of a south-pointing chariot. The Antikythera mechanism is an example of an early and intricate geared device. Its time of construction is now estimated between 150 and 100 BC, the water-powered grain-mill, the water-powered saw mill, fulling mill, and other applications of watermill often used gears. The first mechanical clocks were built in AD725, the 1386 Salisbury cathedral clock may be the worlds oldest working mechanical clock. The definite ratio that teeth give gears provides an advantage over other drives in precision machines such as watches that depend upon an exact velocity ratio, an external gear is one with the teeth formed on the outer surface of a cylinder or cone. Conversely, a gear is one with the teeth formed on the inner surface of a cylinder or cone. For bevel gears, a gear is one with the pitch angle exceeding 90 degrees. Internal gears do not cause output shaft direction reversal, spur gears or straight-cut gears are the simplest type of gear. They consist of a cylinder or disk with teeth projecting radially, though the teeth are not straight-sided, the edge of each tooth is straight and aligned parallel to the axis of rotation. These gears mesh together correctly only if fitted to parallel shafts, No axial thrust is created by the tooth loads. Spur gears are excellent at moderate speeds but tend to be noisy at high speeds, helical or dry fixed gears offer a refinement over spur gears. The leading edges of the teeth are not parallel to the axis of rotation, since the gear is curved, this angling makes the tooth shape a segment of a helix
10.
Steam turbine
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A steam turbine is a device that extracts thermal energy from pressurized steam and uses it to do mechanical work on a rotating output shaft. Its modern manifestation was invented by Sir Charles Parsons in 1884, in 1551, Taqi al-Din in Ottoman Egypt described a steam turbine with the practical application of rotating a spit. Steam turbines were described by the Italian Giovanni Branca and John Wilkins in England. The devices described by Taqi al-Din and Wilkins are today known as steam jacks, in 1672 an impulse steam turbine driven car was designed by Ferdinand Verbiest. A more modern version of car was produced some time in the late 18th century by an unknown German mechanic. The modern steam turbine was invented in 1884 by Sir Charles Parsons, the invention of Parsons steam turbine made cheap and plentiful electricity possible and revolutionized marine transport and naval warfare. Parsons design was a reaction type and his patent was licensed and the turbine scaled-up shortly after by an American, George Westinghouse. The Parsons turbine also turned out to be easy to scale up. Parsons had the satisfaction of seeing his invention adopted for all major world power stations, a number of other variations of turbines have been developed that work effectively with steam. The de Laval turbine accelerated the steam to full speed before running it against a turbine blade, De Lavals impulse turbine is simpler, less expensive and does not need to be pressure-proof. It can operate with any pressure of steam, but is less efficient. He taught at the École des mines de Saint-Étienne for a decade until 1897, one of the founders of the modern theory of steam and gas turbines was Aurel Stodola, a Slovak physicist and engineer and professor at the Swiss Polytechnical Institute in Zurich. His work Die Dampfturbinen und ihre Aussichten als Wärmekraftmaschinen was published in Berlin in 1903, a further book Dampf und Gas-Turbinen was published in 1922. It was used in John Brown-engined merchant ships and warships, including liners, the present-day manufacturing industry for steam turbines is dominated by Chinese power equipment makers. Other manufacturers with minor market share include Bhel, Siemens, Alstom, GE, Doosan Škoda Power, Mitsubishi Heavy Industries, the consulting firm Frost & Sullivan projects that manufacturing of steam turbines will become more consolidated by 2020 as Chinese power manufacturers win increasing business outside of China. There are several classifications for modern steam turbines, Turbine blades are of two basic types, blades and nozzles. Blades move entirely due to the impact of steam on them and this results in a steam velocity drop and essentially no pressure drop as steam moves through the blades. A turbine composed of alternating with fixed nozzles is called an impulse turbine, Curtis turbine, Rateau turbine
11.
5"/38 caliber gun
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The Mark 12 5/38 caliber gun was a US naval gun. The gun was installed into Single Purpose and Dual Purpose mounts used primarily by the US Navy, the 38 caliber barrel was a mid-length compromise between the previous United States standard 5/51 low-angle gun and 5/25 anti-aircraft gun. The increased barrel length provided greatly improved performance in both anti-aircraft and anti-surface roles compared to the 5/25 gun, however, except for the barrel length and the use of semi-fixed ammunition, the 5/38 gun was derived from the 5/25 gun. Both weapons had power ramming, which enabled rapid fire at high angles against aircraft, the 5/38 entered service on USS Farragut, commissioned in 1934. The base ring mount, which improved the rate of fire, entered service on USS Gridley. Even this advanced system required nearly 100 rounds of ammunition expenditure per aircraft kill, however, the planes were normally killed by shell fragments and not direct hits, barrage fire was used, with many guns firing in the air at the same time. Base ring mounts with integral hoists had a rate of fire of 15 rounds per minute per barrel, however. On pedestal and other mounts lacking integral hoists,12 to 15 rounds per minute was the rate of fire, useful life expectancy was 4600 effective full charges per barrel. The 5/38 cal gun was mounted on a large number of US Navy ships in the World War II era. It was backfitted to many of the World War I-era battleships during their wartime refits and it has left active US Navy service, but it is still on mothballed ships of the United States Navy reserve fleets. It is also used by a number of nations who bought or were given US Navy surplus ships, each mount carries one or two Mk 12 5/38cal Gun Assemblies. The gun assembly shown is used in single mounts, and it is the gun in twin mounts. It is loaded from the left side, the left gun in twin mounts is the mirror image of the right gun, and it is loaded from the right side. The Mk12 gun assembly weighs 3,990 lb, the major Mk12 Gun Assembly characteristics are,158 Semi-automatic During recoil, some of the recoil energy is stored in the counter-recoil system. That stored energy is used during counter-recoil to prepare the gun for the next round, the firing pin is cocked, the breech is opened, the spent powder case is ejected, and the bore is air cleaned. Hand loaded A Projectile-Man and a Powder-Man are stationed at each gun assembly and their job is to move the round, consisting of a projectile and a powder case, from the hoists to the rammer tray, and then start the ram cycle. The hydraulically driven Rammer Spade, called the Power Spade in that picture, is at the back of the Rammer Tray, if the multiple names of the Spade is confusing, look at this footnote. Vertical sliding-wedge breech block The breech block closes the chamber behind the powder case and it also holds the firing pin assembly
12.
1.1"/75 caliber gun
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The 1. 1/75 caliber gun was an American anti-aircraft weapon of World War II. The name means that it had a diameter of 1.1 inches and barrel length of 75 ×1.1 inches =82.5 inches. The gun was designed to replace the M2 Browning and four barrels were required to duplicate the rate of fire, the first shipboard installation in 1939 was quickly nicknamed the Chicago Piano. By 1941, these guns had been mounted on destroyers, cruisers, battleships, aircraft carriers, nearly a thousand guns had been produced before production shifted to more reliable shipboard anti-aircraft machine guns in 1942. Quantities were minimal, one mount for a destroyer, two mounts for battleships, and four mounts for North Carolina–class and newer battleships. On at least some ships they were director-controlled and it was replaced by Oerlikon 20 mm cannon or Bofors 40 mm guns whenever possible, but served until the end of the war on some ships. A twin Bofors gun was about the weight, and was a much more powerful gun. The air-cooled Oerlikon had similar effective range and rate of fire with less weight. The Oerlikon could not sustain fire for as long as the water-cooled 1.1, the gun was based on patents of Richmond, Virginia, inventor Robert Hudson, who used a complicated gas-recoil operating system adapted to. 30-06 Springfield and.50 BMG. The United States Navy Bureau of Ordnance had decided the M2 Browning was inadequate for future AA duties, as a result of this and successive meetings, the decision was made to develop a 1.1 machine gun. On December 13,1923, Mr. C. F, the design of the gun mechanism was completed in 1930 and tests on the initial models were carried out in March, April and May 1931. The tests, which demonstrated a rate of 90 r. p. m. were characterized by primer blow backs, misfires. During the next two years, designers corrected these faults and the rate increased to 140. The design was turned over to the Naval Gun Factory for production in 1934 and it is interesting to note that work on the gun was financed not from regular Navy appropriations but from funds supplied through the National Industrial Recovery Act. While the longer range antiaircraft gun field was taken care of, except for insufficient numbers, the situation was far from satisfactory in the short range category. The 1.1 was too heavy to serve as a last-ditch free mount, four were mounted on the Houston and the fifth was a spare. To the surprise of most at Cavite, the one left on the dock survived the Japanese bombing. There is no record of what happened with that one 1.1 caliber mount sent to Corregidor
13.
M2 Browning
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The M2 Machine Gun or Browning.50 Caliber Machine Gun is a heavy machine gun designed toward the end of World War I by John Browning. Its design is similar to Brownings earlier M1919 Browning machine gun, the M2 uses the much larger and much more powerful.50 BMG cartridge, which was developed alongside and takes its name from the gun itself. It has been referred to as Ma Deuce, in reference to its M2 nomenclature, the design has had many specific designations, the official designation for the current infantry type is Browning Machine Gun, Cal.50, M2, HB, Flexible. It is effective against infantry, unarmored or lightly armored vehicles and boats, light fortifications, the M2 has been produced longer than any other machine gun. The Browning.50 caliber machine gun has been used extensively as a vehicle weapon and it was heavily used during World War II, the Korean War, the Vietnam War, the Falklands War, the Iraq War and the War in Afghanistan in the 2000s and 2010s. It is the heavy machine gun of NATO countries, and has been used by many other countries as well. The M2 has been in use longer than any firearm in U. S. inventory except the.45 ACP M1911 pistol. The current M2HB is manufactured in the U. S. by General Dynamics, Ordnance for use by the U. S. government, and for allies via Foreign Military Sales, as well as foreign manufacturers such as FN Herstal. Machine guns were used in World War I, and weapons of larger than rifle caliber were appearing. Both the British and French had large caliber machine guns, the larger rounds were needed to defeat the armor that was being introduced to the battlefield. Armor was also appearing in the skies, during World War I, the Germans introduced a heavily armored airplane, the Junkers J. I. The armor made aircraft machine guns using conventional rifle ammunition ineffective, consequently, the American Expeditionary Forces commander General John J. Pershing asked for a larger caliber machine gun. Pershing asked the Army Ordnance Department to develop a gun with a caliber of at least 0.50 inches. U. S. Col. John Henry Parker, commanding a machine gun school in France, the Army Ordnance Department ordered eight experimental Colt machine guns rechambered for the French 11 mm cartridge. The French had developed a machine gun for an even larger caliber. The French 11 mm round was found to be unsuitable because its velocity was too low, Pershing wanted a bullet of at least 670 gr and a muzzle velocity of 2,700 ft/s. Development with the French round was dropped, around July 1917, John M. Browning started redesigning his.30 caliber machine gun for a larger caliber. Winchester worked on the cartridge, which was a version of the. 30-06
14.
Torpedo tube
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A torpedo tube is a cylinder shaped device for launching torpedoes. There are two types of torpedo tube, underwater tubes fitted to submarines and some surface ships. Thus a submarine torpedo tube operates on the principle of an airlock, the diagram on the right illustrates the operation of a submarine torpedo tube. The diagram is somewhat simplified but does show the working of a torpedo launch. A torpedo tube has a number of interlocks for safety reasons. For example, an interlock prevents the door and muzzle door from opening at the same time. The submarine torpedo launch sequence is, in simplified form, Open the breech door in the torpedo room, load the torpedo into the tube. Hook up the connection and the torpedo power cable. Shut and lock the breech door, turn on power to the torpedo. A minimum amount of time is required for torpedo warmup, fire control programs are uploaded to the torpedo. This may be manually or automatically, from sea or from tanks. The tube must be vented during this process to allow for complete filling, Open the equalizing valve to equalize pressure in the tube with ambient sea pressure. If the tube is set up for Impulse Mode the slide valve will open with the muzzle door, if Swim Out Mode is selected, the slide valve remains closed. The slide valve allows water from the pump to enter the tube. Modern torpedoes have a safety mechanism that prevents activation of the torpedo unless the torpedo senses the required amount of G-force, the power cable is severed at launch. However, if a wire is used, it remains connected through a drum of wire in the tube. Torpedo propulsion systems vary but electric torpedoes swim out of the tube on their own and are of a smaller diameter,21 weapons with fuel-burning engines usually start outside of the tube. Once outside the tube the torpedo begins its run toward the target as programmed by the control system
15.
Torpedo
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Historically, it was called an automotive, automobile, locomotive or fish torpedo, colloquially called a fish. The term torpedo was originally employed for a variety of devices, from about 1900, torpedo has been used strictly to designate an underwater self-propelled weapon. Todays torpedoes can be divided into lightweight and heavyweight classes, and into straight-running, autonomous homers and they can be launched from a variety of platforms. The word torpedo comes from the name of a genus of rays in the order Torpediniformes. In naval usage, the American Robert Fulton introduced the name to refer to a gunpowder charge used by his French submarine Nautilus to demonstrate that it could sink warships. The concept of a torpedo existed many centuries before it was successfully developed. In 1275, Hasan al-Rammah described. an egg which moves itself, in modern language, a torpedo is an underwater self-propelled explosive, —but historically, the term also applied to primitive naval mines. These were used on an ad hoc basis during the modern period up to the late 19th century. An early submarine, the Turtle, attempted to lay a bomb with a fuse on the hull of HMS Eagle during the American Revolutionary War. In the early 1800s, the American inventor Robert Fulton, while in France and he coined the term torpedo in reference to the explosive charges he outfitted his submarine Nautilus. However, both the French and the Dutch governments were uninterested in the submarine, Fulton then concentrated on developing the torpedo independent of a submarine deployment. However, the British government refused to purchase the invention, stating they did not wish to introduce into naval warfare a system that would give advantage to weaker maritime nations. Fulton carried out a demonstration for the US government on 20 July 1807. Further development languished as Fulton focused on his steam-boat matters, during the War of 1812, torpedoes were employed in attempts to destroy British vessels and protect American harbors. In fact a submarine deployed torpedo was used in an attempt to destroy HMS Ramillies while in New Londons harbor. Hardy to warn the Americans to cease efforts with the use of any boat in this cruel and unheard-of warfare. Torpedoes were used by the Russian Empire during the Crimean War in 1855 against British warships in the Gulf of Finland and they used an early form of chemical detonator. During the American Civil War, the torpedo was used for what is today called a contact mine
16.
Depth charge
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A depth charge is an anti-submarine warfare weapon. It is intended to destroy a submarine by being dropped into the nearby and detonating, subjecting the target to a powerful. Most depth charges use high explosive charges and a set to detonate the charge. Depth charges can be dropped by ships, patrol aircraft, Depth charges were developed during World War I, and were one of the first effective methods of attacking a submarine underwater. They were widely used in World War I and World War II and they remained part of the anti-submarine arsenals of many navies during the Cold War. Depth charges have now largely replaced by anti-submarine homing torpedoes. A depth charge fitted with a warhead is known as a nuclear depth bomb. These were designed to be dropped from a plane or deployed by an anti-submarine missile from a surface ship, or another submarine. All nuclear anti-submarine weapons were withdrawn from service by the United States, the United Kingdom, France, Russia and they were replaced by conventional weapons whose accuracy and range had improved greatly as ASW technology improved. The first attempt to fire charges against submerged targets was with aircraft bombs attached to lanyards which triggered them, a similar idea was a 16 lb guncotton charge in a lanyarded can. Two of these together became known as the depth charge Type A. Problems with the lanyards tangling and failing to function led to the development of a chemical pellet trigger as the Type B and these were effective at a distance of around 20 ft. A1913 Royal Navy Torpedo School report described a device intended for countermining, at Admiral John Jellicoes request, the standard Mark II mine was fitted with a hydrostatic pistol preset for 45 ft firing, to be launched from a stern platform. Weighing 1,150 lb, and effective at 100 ft, the design work was carried out by Herbert Taylor at the RN Torpedo and Mine School, HMS Vernon. The first effective depth charge, the Type D, became available in January 1916 and it was a barrel-like casing containing a high explosive. There were initially two sizes—Type D, with a 300 lb charge for fast ships, and Type D* with a 120 lb charge for ships too slow to leave the area before the more powerful charge detonated. A hydrostatic pistol actuated by water pressure at a pre-selected depth detonated the charge, initial depth settings were 40 or 80 ft. Because production could not keep up with demand, anti-submarine vessels initially carried two depth charges, to be released from a chute at the stern of the ship
17.
United States Navy
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The United States Navy is the naval warfare service branch of the United States Armed Forces and one of the seven uniformed services of the United States. The U. S. Navy is the largest, most capable navy in the world, the U. S. Navy has the worlds largest aircraft carrier fleet, with ten in service, two in the reserve fleet, and three new carriers under construction. The service has 323,792 personnel on duty and 108,515 in the Navy Reserve. It has 274 deployable combat vessels and more than 3,700 operational aircraft as of October 2016, the U. S. Navy traces its origins to the Continental Navy, which was established during the American Revolutionary War and was effectively disbanded as a separate entity shortly thereafter. It played a role in the American Civil War by blockading the Confederacy. It played the role in the World War II defeat of Imperial Japan. The 21st century U. S. Navy maintains a global presence, deploying in strength in such areas as the Western Pacific, the Mediterranean. The Navy is administratively managed by the Department of the Navy, the Department of the Navy is itself a division of the Department of Defense, which is headed by the Secretary of Defense. The Chief of Naval Operations is an admiral and the senior naval officer of the Department of the Navy. The CNO may not be the highest ranking officer in the armed forces if the Chairman or the Vice Chairman of the Joint Chiefs of Staff. The mission of the Navy is to maintain, train and equip combat-ready Naval forces capable of winning wars, deterring aggression, the United States Navy is a seaborne branch of the military of the United States. The Navys three primary areas of responsibility, The preparation of naval forces necessary for the prosecution of war. The development of aircraft, weapons, tactics, technique, organization, U. S. Navy training manuals state that the mission of the U. S. Armed Forces is to prepare and conduct prompt and sustained combat operations in support of the national interest, as part of that establishment, the U. S. Navys functions comprise sea control, power projection and nuclear deterrence, in addition to sealift duties. It follows then as certain as that night succeeds the day, that without a decisive naval force we can do nothing definitive, the Navy was rooted in the colonial seafaring tradition, which produced a large community of sailors, captains, and shipbuilders. In the early stages of the American Revolutionary War, Massachusetts had its own Massachusetts Naval Militia, the establishment of a national navy was an issue of debate among the members of the Second Continental Congress. Supporters argued that a navy would protect shipping, defend the coast, detractors countered that challenging the British Royal Navy, then the worlds preeminent naval power, was a foolish undertaking. Commander in Chief George Washington resolved the debate when he commissioned the ocean-going schooner USS Hannah to interdict British merchant ships, and reported the captures to the Congress
18.
Porter-class destroyer
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The Porter-class destroyers were a class of eight 1, 850-ton large destroyers in the United States Navy. Like the preceding Farragut-class, their construction was authorized by Congress on 26 April 1916, the first four Porters were laid down in 1933 by New York Shipbuilding in Camden, New Jersey and the next four in 1934 at Bethlehem Steel Corporation in Quincy, Massachusetts. All were commissioned in 1936 except Winslow, which was commissioned in 1937 and they were built in response to the large Fubuki-class destroyers that the Imperial Japanese Navy was building at the time, and were initially designated as flotilla leaders. They served extensively in World War II, in the Pacific War, the Atlantic, Porter was the classs only loss, in the Battle of the Santa Cruz Islands on 26 October 1942. The larger destroyer leader type had been under consideration since 1921. Indeed the General Board recommended the construction of five of the type in that year, one factor in favor of leaders was the Navys total lack of modern light cruisers, only partly alleviated by the ten Omaha-class ships built in the 1920s. Naval historian Norman Friedman believed that the number of Wickes. The London Naval Treaty and large French destroyers seem to have become the tipping points, the Porters had the same propulsion technology as the immediately preceding Farraguts, with 400 psi steam superheated to 645 °F. The plant was somewhat larger than in the Farraguts, with designed horsepower increased from 42,800 shaft horsepower to 50,000 shaft horsepower, resulting in a speed of 37 kn. Along with the fuel efficiency resulting from superheated steam, the four boilers included economizers to further extend the ships range by preheating incoming feedwater. The main steam turbines were manufactured by New York Shipbuilding in the case of the built by that yard. However, as in the Farraguts, the turbines had single reduction gearing and no cruising turbines. There were extensive discussions about the armament, the 5-inch /25 caliber anti-aircraft gun being favored as being easy to work and train in a fast moving, the other candidate was the 5-inch/51 caliber surface type, being very powerful but all but useless against aircraft. It was a discussion made more interesting as the 5-inch/38 caliber dual purpose gun became available in the early 1930s, the 5-inch/38 gun was simply a 5-inch/25 gun with the same projectiles and a longer barrel, but that significantly increased its range against both air and surface targets. The class was built with eight Mk 12 5-inch/38 caliber guns in four Mark 22 single purpose twin enclosed mounts. Anti-aircraft protection was provided by two quadruple 1. 1-inch mounts, in the 1930s this was considered sufficient, although the Porters had the same eight 21-inch torpedo tubes as the Farraguts, a full set of reloads was carried. In some ships, mount 52 was replaced by a quad 40 mm mount, additional 40 mm guns were added amidships along with 20 mm weapons. On most ships four K-gun depth charge throwers were added to augment the as-built pair of depth charge racks, selfridge and Phelps were in port during the attack on Pearl Harbor on 7 December 1941 and engaged enemy aircraft
19.
Imperial Japanese Navy
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The Imperial Japanese Navy was the navy of the Empire of Japan from 1868 until 1945, when it was dissolved following Japans defeat and surrender in World War II. The Japan Maritime Self-Defense Force was formed after the dissolution of the IJN, the Japanese Navy was the third largest navy in the world by 1920, behind the Royal Navy and the United States Navy. It was supported by the Imperial Japanese Navy Air Service for aircraft and it was the primary opponent of the Western Allies in the Pacific War. This eventually led to the Meiji Restoration, accompanying the re-ascendance of the Emperor came a period of frantic modernization and industrialization. Following the attempts at Mongol invasions of Japan by Kubilai Khan in 1274 and 1281, Japan undertook major naval building efforts in the 16th century, during the Warring States period, when feudal rulers vying for supremacy built vast coastal navies of several hundred ships. Around that time Japan may have developed one of the first ironclad warships when Oda Nobunaga, in 1588 Toyotomi Hideyoshi issued a ban on Wakō piracy, the pirates then became vassals of Hideyoshi, and comprised the naval force used in the Japanese invasion of Korea. Japan built her first large ocean-going warships in the beginning of the 17th century, from 1604 the Bakufu also commissioned about 350 Red seal ships, usually armed and incorporating some Western technologies, mainly for Southeast Asian trade. For more than 200 years, beginning in the 1640s, the Japanese policy of seclusion forbade contacts with the outside world and prohibited the construction of ocean-going ships on pain of death. Contacts were maintained, however, with the Dutch through the port of Nagasaki, the Chinese also through Nagasaki and the Ryukyus and Korea through intermediaries with Tsushima. Apart from Dutch trade ships no other Western vessels were allowed to enter Japanese ports, an exception was during the Napoleonic wars. However frictions with foreign ships started from the beginning of the 19th century, the Nagasaki Harbour Incident involving the HMS Phaeton in 1808 and other subsequent incidents in the following decades led to the Shogunate to enact an edict to repel foreign vessels. Western ships which were increasing their presence around Japan due to whaling, the shogunate also began to strengthen the nations coastal defenses. Numerous attempts to open Japan ended in failure in part to Japanese resistance, during 1853 and 1854, American warships under the command of Commodore Matthew Perry entered Edo Bay and made demonstrations of force requesting trade negotiations. After two hundred years of seclusion the 1854 Convention of Kanagawa led to the opening of Japan to international trade and this was soon followed by the 1858 Treaty of Amity and Commerce and treaties with other powers. In 1855, with Dutch assistance, the Shogunate acquired its first steam warship, Kankō Maru, samurai such as the future Admiral Enomoto Takeaki were sent by the Shogunate to study in the Netherlands for several years. In 1859 the Naval Training Center relocated to Tsukiji in Tokyo, in 1857 the Shogunate acquired its first screw-driven steam warship Kanrin Maru and used it as an escort for the 1860 Japanese delegation to the United States. In 1865 the French naval engineer Léonce Verny was hired to build Japans first modern naval arsenals, at Yokosuka, in 1867–1868 a British Naval mission headed by Commander Richard Tracey went to Japan to assist the development of the Japanese Navy and to organize the naval school of Tsukiji. The Shogunate also allowed and then ordered various domains to purchase warships and to develop naval fleets, Satsuma, a naval center had been set up by the Satsuma domain in Kagoshima, students were sent abroad for training and a number of ships were acquired
20.
Flotilla leaders
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A flotilla leader was a warship suitable for commanding a flotilla of destroyers or other small warships, typically a small cruiser or a large destroyer. They were a feature of navies in the late 19th century, accordingly, large destroyer designs were produced for use as leaders. The last specialized flotilla leader to be built for the Royal Navy was HMS Inglefield, subsequent leaders used the same design as the private ships of the class, with minor detailed changes to suit them to their role. In the Royal Navy, the leader and commanding officer were known as Captain. In the Royal Navy, flotilla leaders and divisional leaders could be identified by coloured bands painted on their funnels. American Cruisers of World War II, missoula, Montana, Pictorial Histories Publishing Company. Navies of the Second World War, garden City, New York, Doubleday and Company. German Warships of the Second World War, navies of the Second World War. Garden City, New York, Doubleday & Company, garden City, New York, Doubleday & Company. Watts, Anthony J. Japanese Warships of World War II, garden City, New York, Doubleday & Company
21.
Displacement (ship)
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The displacement or displacement tonnage of a ship is the ships weight. The name reflects the fact that it is measured indirectly, by first calculating the volume of water displaced by the ship, by Archimedes principle, this is also the weight of the ship. Displacement should not be confused with other measurements of volume or capacity typically used for vessels such as net tonnage, gross tonnage. The process of determining a vessels displacement begins with measuring its draft This is accomplished by means of its draft marks, a merchant vessel has three matching sets, one mark each on the port and starboard sides forward, midships, and astern. These marks allow a ships displacement to be determined to an accuracy of 0. 5%, the draft observed at each set of marks is averaged to find a mean draft. The ships hydrostatic tables show the corresponding volume displaced, to calculate the weight of the displaced water, it is necessary to know its density. Seawater is more dense than water, so a ship will ride higher in salt water than in fresh. The density of water varies with temperature. Devices akin to slide rules have been available since the 1950s to aid in these calculations and it is done today with computers. Displacement is usually measured in units of tonnes or long tons and these bring the ship down to its load draft, colloquially known as the waterline. Full load displacement and loaded displacement have almost identical definitions, full load is defined as the displacement of a vessel when floating at its greatest allowable draft as established by classification societies. Warships have arbitrary full load condition established, deep load condition means full ammunition and stores, with most available fuel capacity used. Light displacement is defined as the weight of the ship excluding cargo, fuel, water, ballast, stores, passengers, crew, normal displacement is the ships displacement with all outfit, and two-thirds supply of stores, ammunition, etc. on board. Standard displacement, also known as Washington displacement, is a term defined by the Washington Naval Treaty of 1922. Naval architecture Hull Hydrodynamics Tonnage Dear, I. C. B, oxford Companion to Ships and the Sea. George, William E. Stability & Trim for the Ships Officer, turpin, Edward A. McEwen, William A. Trim and Stability Information for Drydocking Calculations, conference on the Limitation of Armament,1922. Papers Relating to the Foreign Relations of the United States,1922, proceedings of the United States Naval Institute
22.
London Naval Treaty
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Ratifications were exchanged in London on October 27,1930, and the treaty went into effect on the same day. It was registered in League of Nations Treaty Series on February 6,1931, the terms of the treaty were seen as an extension of the conditions agreed in the Washington Naval Treaty. That treaty had been an effort to prevent an arms race after World War I. The Conference was a revival of the efforts which had gone into the Geneva Naval Conference of 1927, at Geneva, the various negotiators had been unable to reach agreement because of bad feeling between the British Government and that of the United States. Submarine gun caliber was also restricted for the first time to 6.1 inches with one exception and this put an end to the big-gun submarine concept pioneered by the British M class and the French Surcouf. The Treaty also established a distinction between cruisers armed with no greater than 6.1 inches from those with guns up to 8 inches. The number of cruisers was limited – Britain was permitted 15 with a total tonnage of 147,000, the U. S.18 totalling 180,000. For light cruisers, no numbers were specified but tonnage limits were 143,500 tons for the U. S.192,200 tons for the British, and 100,450 tons for the Japanese. Destroyer tonnage was also limited, with destroyers being defined as ships of less than 1,850 tons and guns not exceeding 5.1 inches, the Americans and British were permitted up to 150,000 tons and Japan 105,500 tons. Article 22 relating to submarine warfare declared international law applied to them as to surface vessels, also merchant vessels which demonstrated persistent refusal to stop or active resistance could be sunk without the ships crew and passengers being first delivered to a place of safety. Active negotiations amongst the other treaty signatories continued during the following years and this was followed by the Second London Naval Treaty of 1936. Treaty for the Limitation of Naval Armament Second London Naval Treaty – List of treaties signed in London, Treaty of London – List of treaties signed in London. May 15 Incident - attempted coup in Japan Steiner, Zara S, the Lights that Failed, European International History 1919–1933. ISBN 978-0-19-822114-2, OCLC58853793 Text of the treaty
23.
Boiler
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A boiler is a closed vessel in which water or other fluid is heated. The fluid does not necessarily boil, the heated or vaporized fluid exits the boiler for use in various processes or heating applications, including water heating, central heating, boiler-based power generation, cooking, and sanitation. The pressure vessel of a boiler is usually made of steel, stainless steel, especially of the austenitic types, is not used in wetted parts of boilers due to corrosion and stress corrosion cracking. In live steam models, copper or brass is used because it is more easily fabricated in smaller size boilers. For much of the Victorian age of steam, the material used for boilermaking was the highest grade of wrought iron. In the 20th century, design practice instead moved towards the use of steel, which is stronger and cheaper, with welded construction, which is quicker and requires less labour. It should be noted, however, that wrought iron boilers corrode far slower than their steel counterparts. This makes the longevity of older wrought-iron boilers far superior to those of welded steel boilers, cast iron may be used for the heating vessel of domestic water heaters. Although such heaters are usually termed boilers in some countries, their purpose is usually to produce hot water, not steam, the brittleness of cast iron makes it impractical for high-pressure steam boilers. The source of heat for a boiler is combustion of any of several fuels, such as wood, coal, oil, electric steam boilers use resistance- or immersion-type heating elements. Nuclear fission is used as a heat source for generating steam, either directly or, in most cases. Heat recovery steam generators use the heat rejected from other such as gas turbine. 18th century Haycock boilers generally produced and stored large volumes of very low-pressure steam and these could burn wood or most often, coal. Flued boiler with one or two large flues—an early type or forerunner of fire-tube boiler, fire-tube boiler, Here, water partially fills a boiler barrel with a small volume left above to accommodate the steam. This is the type of boiler used in nearly all steam locomotives, the heat source is inside a furnace or firebox that has to be kept permanently surrounded by the water in order to maintain the temperature of the heating surface below the boiling point. Fire-tube boilers usually have a low rate of steam production. Fire-tube boilers mostly burn solid fuels, but are adaptable to those of the liquid or gas variety. Water-tube boiler, In this type, tubes filled with water are arranged inside a furnace in a number of possible configurations and this type generally gives high steam production rates, but less storage capacity than the above
24.
World War II
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World War II, also known as the Second World War, was a global war that lasted from 1939 to 1945, although related conflicts began earlier. It involved the vast majority of the worlds countries—including all of the great powers—eventually forming two opposing alliances, the Allies and the Axis. It was the most widespread war in history, and directly involved more than 100 million people from over 30 countries. Marked by mass deaths of civilians, including the Holocaust and the bombing of industrial and population centres. These made World War II the deadliest conflict in human history, from late 1939 to early 1941, in a series of campaigns and treaties, Germany conquered or controlled much of continental Europe, and formed the Axis alliance with Italy and Japan. Under the Molotov–Ribbentrop Pact of August 1939, Germany and the Soviet Union partitioned and annexed territories of their European neighbours, Poland, Finland, Romania and the Baltic states. In December 1941, Japan attacked the United States and European colonies in the Pacific Ocean, and quickly conquered much of the Western Pacific. The Axis advance halted in 1942 when Japan lost the critical Battle of Midway, near Hawaii, in 1944, the Western Allies invaded German-occupied France, while the Soviet Union regained all of its territorial losses and invaded Germany and its allies. During 1944 and 1945 the Japanese suffered major reverses in mainland Asia in South Central China and Burma, while the Allies crippled the Japanese Navy, thus ended the war in Asia, cementing the total victory of the Allies. World War II altered the political alignment and social structure of the world, the United Nations was established to foster international co-operation and prevent future conflicts. The victorious great powers—the United States, the Soviet Union, China, the United Kingdom, the Soviet Union and the United States emerged as rival superpowers, setting the stage for the Cold War, which lasted for the next 46 years. Meanwhile, the influence of European great powers waned, while the decolonisation of Asia, most countries whose industries had been damaged moved towards economic recovery. Political integration, especially in Europe, emerged as an effort to end pre-war enmities, the start of the war in Europe is generally held to be 1 September 1939, beginning with the German invasion of Poland, Britain and France declared war on Germany two days later. The dates for the beginning of war in the Pacific include the start of the Second Sino-Japanese War on 7 July 1937, or even the Japanese invasion of Manchuria on 19 September 1931. Others follow the British historian A. J. P. Taylor, who held that the Sino-Japanese War and war in Europe and its colonies occurred simultaneously and this article uses the conventional dating. Other starting dates sometimes used for World War II include the Italian invasion of Abyssinia on 3 October 1935. The British historian Antony Beevor views the beginning of World War II as the Battles of Khalkhin Gol fought between Japan and the forces of Mongolia and the Soviet Union from May to September 1939, the exact date of the wars end is also not universally agreed upon. It was generally accepted at the time that the war ended with the armistice of 14 August 1945, rather than the formal surrender of Japan
25.
Anti-aircraft warfare
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Anti-aircraft warfare or counter-air defence is defined by NATO as all measures designed to nullify or reduce the effectiveness of hostile air action. They include ground-and air-based weapon systems, associated sensor systems, command and control arrangements and it may be used to protect naval, ground, and air forces in any location. However, for most countries the main effort has tended to be homeland defence, NATO refers to airborne air defence as counter-air and naval air defence as anti-aircraft warfare. Missile defence is an extension of air defence as are initiatives to adapt air defence to the task of intercepting any projectile in flight, a surface-based air defence capability can also be deployed offensively to deny the use of airspace to an opponent. Until the 1950s, guns firing ballistic munitions ranging from 20 mm to 150 mm were the weapons, guided missiles then became dominant. The term air defence was probably first used by Britain when Air Defence of Great Britain was created as a Royal Air Force command in 1925. However, arrangements in the UK were also called anti-aircraft, abbreviated as AA, after the First World War it was sometimes prefixed by Light or Heavy to classify a type of gun or unit. Nicknames for anti-aircraft guns include AA, AAA or triple-A, an abbreviation of anti-aircraft artillery, ack-ack, NATO defines anti-aircraft warfare as measures taken to defend a maritime force against attacks by airborne weapons launched from aircraft, ships, submarines and land-based sites. In some armies the term All-Arms Air Defence is used for air defence by nonspecialist troops, other terms from the late 20th century include GBAD with related terms SHORAD and MANPADS. Anti-aircraft missiles are variously called surface-to-air missile, abbreviated and pronounced SAM, non-English terms for air defence include the German FlaK, whence English flak, and the Russian term Protivovozdushnaya oborona, a literal translation of anti-air defence, abbreviated as PVO. In Russian the AA systems are called zenitnye systems, in French, air defence is called DCA. The maximum distance at which a gun or missile can engage an aircraft is an important figure, however, many different definitions are used but unless the same definition is used, performance of different guns or missiles cannot be compared. For AA guns only the part of the trajectory can be usefully used. By the late 1930s the British definition was that height at which an approaching target at 400 mph can be engaged for 20 seconds before the gun reaches 70 degrees elevation. However, effective ceiling for heavy AA guns was affected by nonballistic factors, The maximum running time of the fuse, the capability of fire control instruments to determine target height at long range. The essence of air defence is to detect aircraft and destroy them. The critical issue is to hit a target moving in three-dimensional space, Air defence evolution covered the areas of sensors and technical fire control, weapons, and command and control. At the start of the 20th century these were very primitive or non-existent
26.
Bofors 40 mm gun
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The Bofors 40 mm gun, often referred to simply as the Bofors gun, is an anti-aircraft/multi-purpose autocannon designed in the 1930s by the Swedish arms manufacturer AB Bofors. It was one of the most popular medium-weight anti-aircraft systems during World War II, a small number of these weapons remain in service to this day, and saw action as late as the Gulf War. In the post-war era the original design was not suitable for action against jet powered aircraft, so Bofors introduced a new model of more power. In spite of sharing almost nothing with the design other than the calibre and the distinctive conical flash hider. Although not as popular as the original L/60 model, the L/70 remains in service to this day, especially as a weapon for light armored vehicles. Bofors itself has been part of BAE Systems AB since March 2005, the Swedish Navy purchased a number of 2 pounder Pom-Poms from Vickers as anti-aircraft guns in 1922. The Navy approached Bofors about the development of a capable replacement. Bofors signed a contract in late 1928, Bofors produced a gun that was a smaller version of a 57 mm semi-automatic gun developed as an anti-torpedo boat weapon in the late 19th century by Finspong. Their first test gun was a re-barreled Nordenfelt version of the Finspong gun, testing of this gun in 1929 demonstrated that a problem existed feeding the weapon in order to maintain a reasonable rate of fire. A mechanism that was enough to handle the stresses of moving the large round was too heavy to move quickly enough to fire rapidly. One attempt to solve this problem used zinc shell cases that burned up when fired and this proved to leave heavy zinc deposits in the barrel, and had to be abandoned. This seemed to be the solution they needed, improving firing rates to a level. During this period Krupp purchased a share of Bofors. Krupp engineers started the process of updating the Bofors factories to use equipment and metallurgy. The prototype was completed and fired in November 1931, and by the middle of the month it was firing strings of two and three rounds. Changes to the mechanism were all that remained, and by the end of the year it was operating at 130 rounds per minute. Continued development was needed to turn it into a suitable for production. Since acceptance trials had been passed the year before, this known as the 40 mm akan M/32
27.
20 mm Oerlikon
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The Oerlikon 20 mm cannon is a series of autocannons, based on an original German 20 mm Becker design that appeared very early in World War I. It was widely produced by Oerlikon Contraves and others, with various models employed by both Allied and Axis forces during World War II, and many still in use today. During World War I, the German Reinhold Becker developed a 20 mm caliber cannon and this used a 20x70 RB cartridge and had a cyclic rate of fire of 300 rpm. It was used on a scale as an aircraft gun on Luftstreitkräfte warplanes. Because the Treaty of Versailles banned further production of weapons in Germany. SEMAG continued development of the weapon, and in 1924 had produced the SEMAG L, the Oerlikon firm, named after the Zürich suburb where it was based, then acquired all rights to the weapon, plus the manufacturing equipment and the employees of SEMAG. In 1927 the Oerlikon S was added to the product line. This fired a larger cartridge to achieve a muzzle velocity of 830 m/s, at the cost of increased weight. The purpose of development was to improve the performance of the gun as an anti-tank and anti-aircraft weapon. An improved version known as the 1S followed in 1930, three sizes of gun with their different ammunition and barrel length, but very similar mechanisms, continued to be developed in parallel. In 1930 Oerlikon reconsidered the application of its gun in aircraft and introduced the AF and AL, designed to be used in flexible mounts, the 15-round box magazine used by earlier versions of the gun was replaced by drum magazine holding 15 or 30 rounds. In 1935 it made an important step by introducing a series of guns designed to be mounted in or on the wings of fighter aircraft, designated with FF for Flügelfest meaning wing-mounted, these weapons were again available in the three sizes, with designations FF, FFL and FFS. The FF fired a larger cartridge than the AF, 20x72RB. The FF weighed 24 kg and achieved a velocity of 550 to 600 m/s with a rate of fire of 520 rpm. The FFL of 30 kg fired a projectile at a velocity of 675 m/s with a rate of fire of 500 rpm. And the FFS, which weighed 39 kg, delivered a high velocity of 830 m/s at a rate of fire of 470 rpm. Apart from changes to the design of the guns for wing-mounting and remote control, for the FF series drum sizes of 45,60,75 and 100 rounds were available, but most users chose the 60-round drum. The 1930s were a period of global re-armament, and a number of foreign firms took licenses for the Oerlikon family of aircraft cannon
28.
Neutrality Patrol
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On September 3,1939, the British and French declarations of war on Germany initiated the Battle of the Atlantic. The United States Navy Chief of Naval Operations established an air and ship patrol of the United States Atlantic coast, including the Caribbean Sea. President Franklin D. Roosevelt declared the United States neutrality on September 5, the concept of a naval Neutrality Patrol within that zone was presented to a Conference of Foreign Ministers of the American Republics convened in Panama on September 25. After considerable debate, the agreed on October 2,1939. Despite the name, the Neutrality Patrol greatly favored the British as the Royal Navy had far greater access to the Atlantic, Patrol One, Destroyers USS Hamilton and Leary were assigned patrol station one along a northwest-southeast line off Georges Bank. Patrol Two, Destroyers USS Hopkins and Goff with aircraft of patrol squadron 54 and seaplane tender USS Owl operated from Newport, Rhode Island, between the 38th and 43rd parallels. Patrol Three, Destroyers USS Manley, Barry, Decatur and Reuben James patrolled between the 34th and 38th parallels with aircraft of patrol squadrons 52 and 53, Patrol Six, Destroyers USS Babbitt and Claxton patrolled the Florida Strait and Yucatan Channel. Gannet and Thrush established a base in Puerto Rico. Patrol Nine, Cruisers USS Quincy and Vincennes patrolled within 300 miles of the coast between Newport and Cape Hatteras, the CNO orders of September 4 directed the patrols to report the movements of warships of warring nations in cipher. The Royal Navy destroyer HMS Hyperion intercepted the German liner Columbus on December 19 after three days of radioed position reports by Neutrality Patrol destroyers and cruisers. The Neutrality Patrol similarly radioed position reports of the British RFA tanker Patella a few days later, the German freighter Konsul Horn left Aruba on January 7,1940, posing as a Soviet ship to avoid identification by the Neutrality Patrol. The German freighter Helgoland sailed from Colombia on October 24,1940, Neutrality Patrols began operating from Bermuda following the Destroyers for Bases Agreement. The base was commissioned on April 7,1941, and Carrier Division 3 began using the base the following day, by mid-June cruisers USS Memphis, Milwaukee, Cincinnati and Omaha were patrolling from Trinidad south along the coast of Brazil. Ships, planes, funding, and personnel were assigned in January and February, admiral Bristol remained in Washington, but material for the various bases was assembled and shipped from Naval Air Station Quonset Point. Admiral Bristol insisted that all records be destroyed when an operation was completed and his staff believed he was following Presidential instructions to avoid revealing operations which might not have public-opinion approval. Efforts to document Support Force operations after the war were discouraged to avoid damaging world opinion as to the integrity of United States neutrality. In Newfoundland on August 9,1941, President Roosevelt agreed to provide American destroyers as escorts for the Canada to Iceland portion of HX convoys, HX150 sailed September 16,1941, as the first convoy with American escort. ON18 sailed September 24 as the first westbound convoy with American escort, the Gleaves-class destroyer Kearny was torpedoed while escorting Convoy SC48 on October 17,1941
29.
Caribbean
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The Caribbean is a region that consists of the Caribbean Sea, its islands and the surrounding coasts. The region is southeast of the Gulf of Mexico and the North American mainland, east of Central America, situated largely on the Caribbean Plate, the region comprises more than 700 islands, islets, reefs and cays. These islands generally form island arcs that delineate the eastern and northern edges of the Caribbean Sea, in a wider sense, the mainland countries of Belize, Guyana, Suriname and French Guiana are often included due to their political and cultural ties with the region. Geopolitically, the Caribbean islands are usually regarded as a subregion of North America and are organized into 30 territories including sovereign states, overseas departments, and dependencies. From December 15,1954, to October 10,2010, there was a known as the Netherlands Antilles composed of five states. The West Indies cricket team continues to represent many of those nations, the region takes its name from that of the Caribs, an ethnic group present in the Lesser Antilles and parts of adjacent South America at the time of the Spanish conquest. The two most prevalent pronunciations of Caribbean are KARR-ə-BEE-ən, with the accent on the third syllable. The former pronunciation is the older of the two, although the variant has been established for over 75 years. It has been suggested that speakers of British English prefer KARR-ə-BEE-ən while North American speakers more typically use kə-RIB-ee-ən, usage is split within Caribbean English itself. The word Caribbean has multiple uses and its principal ones are geographical and political. The Caribbean can also be expanded to include territories with strong cultural and historical connections to slavery, European colonisation, the United Nations geoscheme for the Americas accords the Caribbean as a distinct region within the Americas. Physiographically, the Caribbean region is mainly a chain of islands surrounding the Caribbean Sea, to the north, the region is bordered by the Gulf of Mexico, the Straits of Florida and the Northern Atlantic Ocean, which lies to the east and northeast. To the south lies the coastline of the continent of South America, politically, the Caribbean may be centred on socio-economic groupings found in the region. For example, the known as the Caribbean Community contains the Co-operative Republic of Guyana. Bermuda and the Turks and Caicos Islands, which are in the Atlantic Ocean, are members of the Caribbean Community. The Commonwealth of the Bahamas is also in the Atlantic and is a member of the Caribbean Community. According to the ACS, the population of its member states is 227 million people. The geography and climate in the Caribbean region varies, Some islands in the region have relatively flat terrain of non-volcanic origin and these islands include Aruba, Barbados, Bonaire, the Cayman Islands, Saint Croix, the Bahamas, and Antigua
30.
Southeast Pacific Area
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The Southeast Pacific Area was one of the designated area commands created by the Combined Chiefs of Staff in the Pacific region during World War II. It was responsible to the Joint Chiefs of Staff via the Commander-in-Chief of the United States Navy, rear Admiral Abel T. Bidwell, former commander of Cruiser Division Three, commanded the Southeast Pacific Area during the first months of the war. On 24 March 1942, the newly formed British and Combined Chiefs of Staff issued a directive designating the Pacific theater an area of American strategic responsibility. Six days later the Joint Chiefs of Staff divided the Pacific theater into three areas, the Pacific Ocean Areas, the Southwest Pacific Area, and the Southeast Pacific Area. The Southeast Pacific Force, SoEastPac, was a force of cruisers and destroyers based at Balboa
31.
Panama Canal
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The Panama Canal is an artificial 48-mile waterway in Panama that connects the Atlantic Ocean with the Pacific Ocean. The canal cuts across the Isthmus of Panama and is a key conduit for maritime trade. The original locks are 33.5 metres wide, a third, wider lane of locks was constructed between September 2007 and May 2016. The expanded canal began operation on June 26,2016. The new locks allow transit of larger, Post-Panamax ships, capable of handling more cargo, France began work on the canal in 1881 but stopped due to engineering problems and a high worker mortality rate. The United States took over the project in 1904 and opened the canal on August 15,1914, Colombia, France, and later the United States controlled the territory surrounding the canal during construction. The U. S. continued to control the canal and surrounding Panama Canal Zone until the 1977 Torrijos–Carter Treaties provided for handover to Panama. After a period of joint American–Panamanian control, in 1999 the canal was taken over by the Panamanian government and is now managed and operated by the government-owned Panama Canal Authority. Annual traffic has risen from about 1,000 ships in 1914, by 2012, more than 815,000 vessels had passed through the canal. It takes six to eight hours to pass through the Panama Canal, the American Society of Civil Engineers has called the Panama Canal one of the seven wonders of the modern world. Such a route would have given the Spanish a military advantage over the Portuguese, during an expedition from 1788 to 1793, Alessandro Malaspina outlined plans for its construction. Given the strategic location of Panama and the potential offered by its narrow isthmus separating two great oceans, other links in the area were attempted over the years. The ill-fated Darien scheme was launched by the Kingdom of Scotland in 1698 to set up a trade route. Generally inhospitable conditions thwarted the effort, and it was abandoned in April 1700, another effort was made in 1843. They referred to it as the Atlantic and Pacific Canal and it was a wholly British endeavor and it was expected to be completed in five years, but the plan was never carried out. At nearly the same time, other ideas were floated, including a canal across Mexicos Isthmus of Tehuantepec. Nothing came of that plan either. )In 1846 the Mallarino–Bidlack Treaty, negotiated between the U. S. and New Granada, granted the United States transit rights and the right to intervene militarily in the isthmus. In 1849, the discovery of gold in California created great interest in a crossing between the Atlantic and Pacific Oceans, the Panama Railway was built by the United States to cross the isthmus and opened in 1855
32.
Society Islands
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The Society Islands includes a group of islands in the South Pacific Ocean. It is, politically and legally, part of French Polynesia and they have a population of 235,295 inhabitants. They cover an area of 1,590 square kilometres. The islanders explain their origins in term of a myth, the feathered god Taaroa lay in his shell. He called out but no-one answered, so he went back into his shell, when he came out he changed his body into the multi-layered dome of the sky. Other parts of his body he transformed into Papa-fenua, the earth, other parts he made into Te Tuma, the ata, or shadow of his phallus. Taaroa said, Cast your eyes on my phallus, gaze upon it and insert it in the earth. He came down to earth at Opoa in Havaii, one of the most sacred places in the Society Islands, other gods were created, and these ran directly into the time of the people. The high chiefs or arii rahi were descendants from the gods, in their presence commoners showed respect by stripping to the waist. The high chiefs erected marae as places of worship, in the generations before Europeans arrived, a cult called Oro-maro-ura developed, the cult of the red-feathered girdle. This became a symbol of the chiefs power. Key followers of the Oro cult were the arioi, who lived separately from the common people and they wore scented flowers and adorned themselves with scents and scarlet-dyed cloth. The head of each group was heavily tattooed from ankle to thigh. Both male and female blacklegs were a group but they were forbidden to have children. Their babies were all killed at birth and they received and gave lavish presents. They had a range of artistic skills and could be priests, navigators. Only good-looking men or women could become arioi and they played a crucial role in ceremonies associated with birth, deaths and marriage. The first European explorers arrived in 1722, jacob Roggeveens Dutch West Indian Expedition was shipwrecked on Takapoto
33.
South West Pacific Area (command)
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South West Pacific Area was the name given to the Allied supreme military command in the South West Pacific Theatre of World War II. It was one of four major Allied commands in the Pacific War, SWPA included the Philippines, Borneo, the Dutch East Indies, East Timor, Australia, the Territories of Papua and New Guinea, and the western part of the Solomon Islands. It primarily consisted of United States and Australian forces, although Dutch, Filipino, British, General Douglas MacArthur was appointed as the Supreme Commander, Southwest Pacific Area, on its creation on 18 April 1942. He created five subordinate commands, Allied Land Forces, Allied Air Forces, Allied Naval Forces, United States Army Forces in Australia, and the United States Army Forces in the Philippines. The last command disappeared when Corregidor surrendered on 6 May 1942, while USAFIA became the United States Army Services of Supply, in 1943, United States Army Forces in the Far East was reformed and assumed responsibility for administration, leaving USASOS as a purely logistical agency. Both were swept away in a reorganisation in 1945, the other three commands, Allied Land Forces, Allied Air Forces and Allied Naval Forces, remained until SWPA was abolished on 2 September 1945. The forerunner of the South West Pacific Area was the short-lived American-British-Dutch-Australian Command, in December 1941 and January 1942, ABDA was referred to as the South West Pacific Area. The next day, by radiogram, the Chief of Staff of the United States Army, Marshall, ordered Barnes to assume command as Commander, US Troops in Australia and take charge of all troops and supplies. On 22 December 1941, with the arrival in Brisbane. It was renamed U. S. Army Forces in Australia on 5 January 1942 and its mission was to create a base in Australia for the support of the forces still in the Philippines. What would replace ADBA was the subject of discussions between the Australian and New Zealand chiefs of staff that were held in Melbourne between 26 February and 1 March 1942, churchill responded favourably to the proposal, and the governments of Australia and New Zealand were then consulted. They endorsed the idea of an American supreme commander, but wanted to have input into matters of strategy. This resulted in the creation of the Pacific War Council, which met for the first time in London on 10 February 1942. Churchill, Clement Attlee and Anthony Eden represented the United Kingdom, Page was replaced as the Australian representative by Stanley Bruce in June 1942. A parallel Pacific War Council was created in Washington, D. C. that first met on 1 April 1942 and it was chaired by Roosevelt, with Richard Casey and later Owen Dixon representing Australia, and Prime Minister Mackenzie King representing Canada. The Pacific War Council never became a body, and had no influence on strategy. The obvious choice for a commander in the Pacific was General Douglas MacArthur. MacArthur had solid support from the President, the Army and the American people, while the Army planners, led by Brigadier General Dwight Eisenhower, were willing to compromise on a divided command, they objected to placing Australia and New Zealand in separate theatres
34.
New Guinea
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New Guinea is a large Island in the South West Pacific region. It is the worlds second-largest island, after Greenland, covering an area of 785,753 km2. The island is divided between two countries, Papua New Guinea to the east, and Indonesia to the west, the island has been known by various names. The name Papua was used to refer to parts of the island before contact with the West and its etymology is unclear, one theory states that it is from Tidore, the language used by the Sultanate of Tidore, which controlled parts of the islands coastal region. The name came from papo and ua, which means not united or, ploeg reports that the word papua is often said to derive from the Malay word papua or pua-pua, meaning frizzly-haired, referring to the highly curly hair of the inhabitants of these areas. When the Portuguese and Spanish explorers arrived in the island via the Spice Islands, when the Dutch colonized it as part of Netherlands East Indies, they called it Nieuw Guinea. The name Irian was used in the Indonesian language to refer the island and Indonesian province, the name was promoted in 1945 by Marcus Kaisiepo, brother of the future governor Frans Kaisiepo. It is taken from the Biak language of Biak Island, and means to rise and this name of Irian is the name used in the Biak language and other languages such as Serui, Merauke and Waropen. The name was used until 2001, when the name Papua was again used for the island, the name Irian, which was originally favored by natives, is now considered to be a name imposed by the authority of Jakarta. New Guinea is an island to the north of Australia, and it is isolated by the Arafura Sea to the west and the Torres Strait and Coral Sea to the east. A spine of east–west mountains, the New Guinea Highlands, dominates the geography of New Guinea, stretching over 1,600 km from the head to the tail of the island. The western half of the island of New Guinea contains the highest mountains in Oceania, rising up to 4,884 m high, the tree line is around 4,000 m elevation and the tallest peaks contain permanent equatorial glaciers—which have been retreating since at least 1936. Various other smaller mountain ranges occur both north and west of the central ranges, except in high elevations, most areas possess a warm humid climate throughout the year, with some seasonal variation associated with the northeast monsoon season. At 4,884 metres, Puncak Jaya makes New Guinea the worlds fourth highest landmass, Puncak Mandala, located in Papua, is the second highest peak on the island at 4,760 metres. Puncak Trikora, also in Papua, is 4,750 metres, mount Wilhelm is the highest peak on the PNG side of the border at 4,509 metres. Its granite peak is the highest point of the Bismarck Range, mount Giluwe 4,368 metres is the second highest summit in PNG. It is also the highest volcanic peak in Oceania, another major habitat feature is the vast southern and northern lowlands. Stretching for hundreds of kilometres, these include lowland rainforests, extensive wetlands, savanna grasslands, the southern lowlands are the site of Lorentz National Park, also a UNESCO World Heritage Site
35.
Solomon Islands
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The countrys capital, Honiara, is located on the island of Guadalcanal. The islands have been inhabited for thousands of years, in 1568, the Spanish navigator Álvaro de Mendaña was the first European to visit them, naming them the Islas Salomón. Britain defined its area of interest in the Solomon Islands archipelago in June 1893, during World War II, the Solomon Islands campaign saw fierce fighting between the United States and the Empire of Japan, such as in the Battle of Guadalcanal. The official name of the then British overseas territory was changed from the British Solomon Islands Protectorate to Solomon Islands in 1975, self-government was achieved in 1976, independence was obtained two years later. Today, Solomon Islands is a monarchy with the Queen of Solomon Islands, currently Queen Elizabeth II. Manasseh Sogavare is the current prime minister, in 1568, the Spanish navigator Álvaro de Mendaña was the first European to visit the Solomon Islands archipelago, naming it Islas Salomón after the wealthy biblical King Solomon. It is said that they were given name in the mistaken assumption that they contained great riches. During most of the period of British rule the territory was named the British Solomon Islands Protectorate. On 22 June 1975 the territory was renamed Solomon Islands, when Solomon Islands became independent in 1978 they retained the name. The definite article, the, is not part of the official name but is sometimes used. It is believed that Papuan-speaking settlers began to arrive around 30,000 BC, austronesian speakers arrived c.4000 BC also bringing cultural elements such as the outrigger canoe. Between 1200 and 800 BC the ancestors of the Polynesians, the Lapita people, the first European to visit the islands was the Spanish navigator Álvaro de Mendaña de Neira, coming from Peru in 1568. The people of Solomon Islands were notorious for headhunting and cannibalism before the arrival of the Europeans, missionaries began visiting the Solomons in the mid-19th century. They made little progress at first, because blackbirding led to a series of reprisals, the evils of the labour trade prompted the United Kingdom to declare a protectorate over the southern Solomons in June 1893. Traditional trade and social intercourse between the western Solomon Islands of Mono and Alu and the societies in the south of Bougainville, however. Missionaries settled in the Solomons under the protectorate, converting most of the population to Christianity, in the early 20th century several British and Australian firms began large-scale coconut planting. Economic growth was slow, however, and the islanders benefited little, journalist Joe Melvin visited in 1892, as part of his undercover investigation into blackbirding. In 1908 the islands were visited by Jack London, who was cruising the Pacific on his boat, with the outbreak of the Second World War most planters and traders were evacuated to Australia and most cultivation ceased
36.
Brazil
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Brazil, officially the Federative Republic of Brazil, is the largest country in both South America and Latin America. As the worlds fifth-largest country by area and population, it is the largest country to have Portuguese as an official language. Its Amazon River basin includes a vast tropical forest, home to wildlife, a variety of ecological systems. This unique environmental heritage makes Brazil one of 17 megadiverse countries, Brazil was inhabited by numerous tribal nations prior to the landing in 1500 of explorer Pedro Álvares Cabral, who claimed the area for the Portuguese Empire. Brazil remained a Portuguese colony until 1808, when the capital of the empire was transferred from Lisbon to Rio de Janeiro, in 1815, the colony was elevated to the rank of kingdom upon the formation of the United Kingdom of Portugal, Brazil and the Algarves. Independence was achieved in 1822 with the creation of the Empire of Brazil, a state governed under a constitutional monarchy. The ratification of the first constitution in 1824 led to the formation of a bicameral legislature, the country became a presidential republic in 1889 following a military coup détat. An authoritarian military junta came to power in 1964 and ruled until 1985, Brazils current constitution, formulated in 1988, defines it as a democratic federal republic. The federation is composed of the union of the Federal District, the 26 states, Brazils economy is the worlds ninth-largest by nominal GDP and seventh-largest by GDP as of 2015. A member of the BRICS group, Brazil until 2010 had one of the worlds fastest growing economies, with its economic reforms giving the country new international recognition. Brazils national development bank plays an important role for the economic growth. Brazil is a member of the United Nations, the G20, BRICS, Unasul, Mercosul, Organization of American States, Organization of Ibero-American States, CPLP. Brazil is a power in Latin America and a middle power in international affairs. One of the worlds major breadbaskets, Brazil has been the largest producer of coffee for the last 150 years and it is likely that the word Brazil comes from the Portuguese word for brazilwood, a tree that once grew plentifully along the Brazilian coast. In Portuguese, brazilwood is called pau-brasil, with the word brasil commonly given the etymology red like an ember, formed from Latin brasa and the suffix -il. As brazilwood produces a red dye, it was highly valued by the European cloth industry and was the earliest commercially exploited product from Brazil. The popular appellation eclipsed and eventually supplanted the official Portuguese name, early sailors sometimes also called it the Land of Parrots. In the Guarani language, a language of Paraguay, Brazil is called Pindorama
37.
South Atlantic
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The Atlantic Ocean is the second largest of the worlds oceans with a total area of about 106,460,000 square kilometres. It covers approximately 20 percent of the Earths surface and about 29 percent of its surface area. It separates the Old World from the New World, the Atlantic Ocean occupies an elongated, S-shaped basin extending longitudinally between Eurasia and Africa to the east, and the Americas to the west. The Equatorial Counter Current subdivides it into the North Atlantic Ocean, in contrast, the term Atlantic originally referred specifically to the Atlas Mountains in Morocco and the sea off the Strait of Gibraltar and the North African coast. The Greek word thalassa has been reused by scientists for the huge Panthalassa ocean that surrounded the supercontinent Pangaea hundreds of years ago. The term Aethiopian Ocean, derived from Ancient Ethiopia, was applied to the Southern Atlantic as late as the mid-19th century, many Irish or British people refer to the United States and Canada as across the pond, and vice versa. The Black Atlantic refers to the role of ocean in shaping black peoples history. Irish migration to the US is meant when the term The Green Atlantic is used, the term Red Atlantic has been used in reference to the Marxian concept of an Atlantic working class, as well as to the Atlantic experience of indigenous Americans. Correspondingly, the extent and number of oceans and seas varies, the Atlantic Ocean is bounded on the west by North and South America. It connects to the Arctic Ocean through the Denmark Strait, Greenland Sea, Norwegian Sea, to the east, the boundaries of the ocean proper are Europe, the Strait of Gibraltar and Africa. In the southeast, the Atlantic merges into the Indian Ocean, the 20° East meridian, running south from Cape Agulhas to Antarctica defines its border. In the 1953 definition it extends south to Antarctica, while in later maps it is bounded at the 60° parallel by the Southern Ocean, the Atlantic has irregular coasts indented by numerous bays, gulfs, and seas. Including these marginal seas the coast line of the Atlantic measures 111,866 km compared to 135,663 km for the Pacific. Including its marginal seas, the Atlantic covers an area of 106,460,000 km2 or 23. 5% of the ocean and has a volume of 310,410,900 km3 or 23. 3%. Excluding its marginal seas, the Atlantic covers 81,760,000 km2 and has a volume of 305,811,900 km3, the North Atlantic covers 41,490,000 km2 and the South Atlantic 40,270,000 km2. The average depth is 3,646 m and the maximum depth, the bathymetry of the Atlantic is dominated by a submarine mountain range called the Mid-Atlantic Ridge. It runs from 87°N or 300 km south of the North Pole to the subantarctic Bouvet Island at 42°S, the MAR divides the Atlantic longitudinally into two halves, in each of which a series of basins are delimited by secondary, transverse ridges. The MAR reaches above 2000 m along most of its length, the MAR is a barrier for bottom water, but at these two transform faults deep water currents can pass from one side to the other
38.
Invasion of Normandy
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The Western Allies of World War II launched the largest amphibious invasion in history when they assaulted Normandy, located on the northern coast of France, on 6 June 1944. The invaders were able to establish a beachhead as part of Operation Overlord after a successful D-Day, Allied land forces came from the United States, Britain, Canada, and Free French forces. The Normandy invasion began with overnight parachute and glider landings, massive air attacks, the invasion began and during the evening the remaining elements of the airborne divisions landed. Land forces used on D-Day sailed from bases along the south coast of England, Allied forces rehearsed their D-Day roles for months before the invasion. On 28 April 1944, in south Devon on the English coast,749 U. S. soldiers and sailors were killed when German torpedo boats surprised one of these landing exercises, Exercise Tiger. In the months leading up to the invasion, the Allied forces conducted an operation, Operation Fortitude, aimed at misleading the Germans with respect to the date. There were several leaks prior to or on D-Day, through the Cicero affair, the Germans obtained documents containing references to Overlord, but these documents lacked all detail. Double Cross agents, such as the Spaniard Juan Pujol, played an important role in convincing the German High Command that Normandy was at best a diversionary attack. After being told, Eisenhower reduced Miller to lieutenant colonel and sent him back to the U. S. where he retired, another such leak was General Charles de Gaulles radio message after D-Day. He, unlike all the leaders, stated that this invasion was the real invasion. This had the potential to ruin the Allied deceptions Fortitude North, in contrast, Gen. Eisenhower referred to the landings as the initial invasion. A full moon occurred on 6 June, Allied Expeditionary Force Supreme Commander Dwight D. Eisenhower had tentatively selected 5 June as the date for the assault. The weather was fine during most of May, but deteriorated in early June, the Allied troop convoys already at sea were forced to take shelter in bays and inlets on the south coast of Britain for the night. It seemed possible that everything would have to be cancelled and the returned to their embarkation camps. The next full moon period would be nearly a month away, at a vital meeting on 5 June, Eisenhowers chief meteorologist forecast a brief improvement for 6 June. Commander of all forces for the invasion General Bernard Montgomery. Commander of the Allied Air Forces Air Chief Marshal Leigh Mallory was doubtful, on the strength of Staggs forecast, Eisenhower ordered the invasion to proceed. As a result, prevailing overcast skies limited Allied air support, some troops stood down and many senior officers were away for the weekend
39.
Operation Dragoon
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Operation Dragoon was the code name for the Allied invasion of Southern France on 15 August 1944. By July 1944 the landing was reconsidered, as the ports in Normandy did not have the capacity to adequately supply the Allied forces. Concurrently, the French High Command pushed for a revival of the operation that would include large numbers of French troops, as a result, the operation was finally approved in July to be executed in August. The goal of the operation was to secure the ports on the French Mediterranean coast. After some preliminary commando operations, the US VI Corps landed on the beaches of the Côte dAzur under the shield of a naval task force. Hindered by total Allied air superiority and an uprising by the French Resistance. The Germans decided to withdraw towards the north through the Rhône valley, Allied mobile units were able to overtake the Germans and partially block their route at the town of Montélimar. The ensuing battle led to a stalemate, with neither able to achieve a decisive breakthrough, until the Germans were finally able to complete their withdrawal. While the Germans were retreating, the French managed to capture the important ports of Marseille and Toulon, the Germans were not able to hold Dijon and ordered a complete withdrawal from Southern France. Army Group G retreated further north, pursued by Allied forces, the fighting ultimately came to a stop at the Vosges mountains, where Army Group G was finally able to establish a stable defense line. After meeting with the Allied units from Operation Overlord, the Allied forces were in need of reorganizing and, facing stiffened German resistance, Operation Dragoon was considered a success by the Allies. The captured French ports were put into operation, allowing the Allies to solve their supply problems soon after, during planning stages, the 1942 operation was known as Anvil, to complement Operation Sledgehammer, at that time the code name for the invasion of Normandy. Subsequently, both plans were renamed, Sledgehammer becoming Operation Overlord, and Anvil becoming Operation Dragoon, the original idea of an invasion of Southern France had come from General George Marshall, the U. S. Army Chief of Staff already in 1942. Operation Dragoon was controversial from the time it was first proposed, the American military leadership and its British counterparts disagreed on the operation. When first planned, the landings were to take place simultaneously – Overlord in Normandy and it soon became clear that a dual landing was impossible to conduct with the available forces. The expansion of Overlord from a three- to a five-division front required many additional LSTs, at the same time, another Allied amphibious landing in Italy at Anzio had gone badly. All of these resulted in the postponing of Anvil by the Allies, after the landing at Normandy, a revival of Anvil became increasingly attractive to the Allied planners. These factors led to a reconsideration of the plan, despite Churchills objections, the operation was authorized by the Allied Combined Chiefs of Staff on 14 July and then renamed Dragoon on 1 August
40.
Tropical cyclone
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Depending on its location and strength, a tropical cyclone is referred to by names such as hurricane, typhoon /taɪˈfuːn/, tropical storm, cyclonic storm, tropical depression, and simply cyclone. A hurricane is a storm that occurs in the Atlantic Ocean and northeastern Pacific Ocean, a typhoon occurs in the northwestern Pacific Ocean, Tropical cyclones typically form over large bodies of relatively warm water. They derive their energy through the evaporation of water from the ocean surface and this energy source differs from that of mid-latitude cyclonic storms, such as noreasters and European windstorms, which are fueled primarily by horizontal temperature contrasts. The strong rotating winds of a tropical cyclone are a result of the conservation of momentum imparted by the Earths rotation as air flows inwards toward the axis of rotation. As a result, they form within 5° of the equator. Tropical cyclones are typically between 100 and 2,000 km in diameter, Tropical refers to the geographical origin of these systems, which form almost exclusively over tropical seas. Cyclone refers to their nature, with wind blowing counterclockwise in the Northern Hemisphere. The opposite direction of circulation is due to the Coriolis effect, in addition to strong winds and rain, tropical cyclones are capable of generating high waves, damaging storm surge, and tornadoes. They typically weaken rapidly over land where they are cut off from their energy source. For this reason, coastal regions are vulnerable to damage from a tropical cyclone as compared to inland regions. Heavy rains, however, can cause significant flooding inland, though their effects on human populations are often devastating, tropical cyclones can relieve drought conditions. They also carry heat away from the tropics and transport it toward temperate latitudes. Tropical cyclones are areas of low pressure in the troposphere. On Earth, the pressures recorded at the centers of tropical cyclones are among the lowest ever observed at sea level, the environment near the center of tropical cyclones is warmer than the surroundings at all altitudes, thus they are characterized as warm core systems. The near-surface wind field of a cyclone is characterized by air rotating rapidly around a center of circulation while also flowing radially inwards. At the outer edge of the storm, air may be nearly calm, however, due to the Earths rotation, as air flows radially inward, it begins to rotate cyclonically in order to conserve angular momentum. At an inner radius, air begins to ascend to the top of the troposphere and this radius is typically coincident with the inner radius of the eyewall, and has the strongest near-surface winds of the storm, consequently, it is known as the radius of maximum winds. Once aloft, air flows away from the center, producing a shield of cirrus clouds
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The Bahamas
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The Bahamas, known officially as the Commonwealth of the Bahamas, is an archipelagic state within the Lucayan Archipelago. The capital is Nassau on the island of New Providence, the designation of the Bahamas can refer either to the country or to the larger island chain that it shares with the Turks and Caicos Islands. As stated in the mandate/manifesto of the Royal Bahamas Defence Force, the Bahamas is the site of Columbus first landfall in the New World in 1492. At that time, the islands were inhabited by the Lucayan, although the Spanish never colonised the Bahamas, they shipped the native Lucayans to slavery in Hispaniola. The islands were mostly deserted from 1513 until 1648, when English colonists from Bermuda settled on the island of Eleuthera, the Bahamas became a British Crown colony in 1718, when the British clamped down on piracy. After the American War of Independence, the Crown resettled thousands of American Loyalists in the Bahamas, they brought their slaves with them, Africans constituted the majority of the population from this period. Slavery in the Bahamas was abolished in 1834, Today the descendants of slaves and free Africans make up nearly 90% of the population, issues related to the slavery years are part of society. The Bahamas became an independent Commonwealth realm in 1973, retaining Queen Elizabeth II as its monarch, in terms of gross domestic product per capita, the Bahamas is one of the richest countries in the Americas, with an economy based on tourism and finance. The name Bahamas is derived from either the Taino ba ha ma, alternatively, it may originate from Guanahani, a local name of unclear meaning. In English, the Bahamas is one of two countries whose self-standing short name begins with the word the, along with The Gambia. Taino people moved into the uninhabited southern Bahamas from Hispaniola and Cuba around the 11th century and they came to be known as the Lucayan people. An estimated 30,000 Lucayan inhabited the Bahamas at the time of Christopher Columbus arrival in 1492, Columbuss first landfall in the New World was on an island he named San Salvador. Some researchers believe this site to be present-day San Salvador Island, an alternative theory holds that Columbus landed to the southeast on Samana Cay, according to calculations made in 1986 by National Geographic writer and editor Joseph Judge, based on Columbuss log. Evidence in support of this remains inconclusive, on the landfall island, Columbus made first contact with the Lucayan and exchanged goods with them. The Spanish forced much of the Lucayan population to Hispaniola for use as forced labour, the slaves suffered from harsh conditions and most died from contracting diseases to which they had no immunity, half of the Taino died from smallpox alone. The population of the Bahamas was severely diminished, in 1648, the Eleutherian Adventurers, led by William Sayle, migrated from Bermuda. These English Puritans established the first permanent European settlement on an island which they named Eleuthera—the name derives from the Greek word for freedom and they later settled New Providence, naming it Sayles Island after one of their leaders. To survive, the settlers salvaged goods from wrecks, in 1670 King Charles II granted the islands to the Lords Proprietors of the Carolinas in North America
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Battleship
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A battleship is a large armored warship with a main battery consisting of large caliber guns. During the late 19th and early 20th centuries the battleship was the most powerful type of warship, the word battleship was coined around 1794 and is a contraction of the phrase line-of-battle ship, the dominant wooden warship during the Age of Sail. The term came into use in the late 1880s to describe a type of ironclad warship. In 1906, the commissioning of HMS Dreadnought heralded a revolution in battleship design, subsequent battleship designs, influenced by HMS Dreadnought, were referred to as dreadnoughts. Battleships were a symbol of naval dominance and national might, the launch of Dreadnought in 1906 commenced a new naval arms race. Jutland was the largest naval battle and the only full-scale clash of battleships in the war, the Naval Treaties of the 1920s and 1930s limited the number of battleships, though technical innovation in battleship design continued. The value of the battleship has been questioned, even during their heyday, there were few of the decisive fleet battles that battleship proponents expected, and used to justify the vast resources spent on building battlefleets. Battleships were retained by the United States Navy into the Cold War for fire support purposes before being stricken from the U. S. Naval Vessel Register in the 2000s. A ship of the line was a large, unarmored wooden sailing ship which mounted a battery of up to 120 smoothbore guns, from 1794, the alternative term line of battle ship was contracted to battle ship or battleship. The sheer number of guns fired broadside meant a sail battleship could wreck any wooden enemy, holing her hull, knocking down masts, wrecking her rigging, and killing her crew. However, the range of the guns was as little as a few hundred yards. The first major change to the ship of the concept was the introduction of steam power as an auxiliary propulsion system. Steam power was introduced to the navy in the first half of the 19th century, initially for small craft. The French Navy introduced steam to the line of battle with the 90-gun Napoléon in 1850—the first true steam battleship, Napoléon was armed as a conventional ship-of-the-line, but her steam engines could give her a speed of 12 knots, regardless of the wind condition. This was a decisive advantage in a naval engagement. The introduction of steam accelerated the growth in size of battleships, the adoption of steam power was only one of a number of technological advances which revolutionized warship design in the 19th century. The ship of the line was overtaken by the ironclad, powered by steam, protected by metal armor, and armed with guns firing high-explosive shells. In the Crimean War, six ships and two frigates of the Russian Black Sea Fleet destroyed seven Turkish frigates and three corvettes with explosive shells at the Battle of Sinop in 1853
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USS New Mexico (BB-40)
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USS New Mexico was a battleship in service with the United States Navy from 1918 to 1946. She was the ship of a class of three battleships, and the first ship to be named for the state of New Mexico. Her keel was laid down on 14 October 1915 at the New York Navy Yard, she was launched on 23 April 1917 and she was the first ship with a turbo-electric transmission, which helped her reach a cruising speed of 10 knots. Shortly after completing training, New Mexico escorted the ship that carried President Woodrow Wilson to Brest. The interwar period was marked with repeated exercises with the Pacific and Atlantic Fleets, use as a ship for PID controllers. The ships first actions during World War II were neutrality patrols in the Atlantic Ocean and these were interspersed with escort duties, patrols, and refits. The ship was attacked by kamikazes on several occasions, New Mexico was present in Tokyo Bay for the signing of the Japanese Instrument of Surrender on 2 September 1945. Four days later, she sailed for the United States, New Mexico was decommissioned in Boston on 19 July 1946, and struck from the Naval Vessel Register on 25 February 1947. City fireboats were sent to block the passage of the battleship, scrapping commenced in November and was completed by July 1948. New Mexico was 624 feet long overall and had a beam of 97 ft 5 in and she displaced 32,000 long tons as designed and up to 33,000 long tons at full combat load. The ship had a range of 8,000 nautical miles at a speed of 10 kn. Her crew numbered 1,084 officers and enlisted men, as built, she was fitted with two lattice masts with spotting tops for the main gun battery. The main armored belt was 13.5 in thick, while the armored deck was up to 3.5 in thick. The main battery gun turrets had 18 in thick faces on 13 in barbettes, the conning tower had 16 in thick sides. The ship was armed with a battery of twelve 14-inch /50 caliber guns in four, three-gun turrets on the centerline. Unlike earlier American battleships with triple turrets, these mounts were true three-gun barrels, the secondary battery consisted of fourteen 5-inch /51 caliber guns mounted in individual casemates clustered in the superstructure amidships. As a result, these guns were removed and the casemates were plated over to prevent flooding, the secondary battery was augmented with four 3-inch /50 caliber guns. In addition to her gun armament, New Mexico was also fitted with two 21-inch torpedo tubes, mounted submerged in the hull, one on each broadside, on 30 June 1914, New Mexico was authorized by the United States Congress
44.
Gibbs & Cox
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Gibbs & Cox is a U. S. naval architecture firm that specializes in designing surface warships. Founded in 1922 in New York City, Gibbs & Cox is now headquartered in Arlington, the firm has offices in New York City, Washington, D. C. Newport News, Virginia, Philadelphia, Pennsylvania, and New Orleans, in 2003, more than 150 warships built to the firms designs, including 60 percent of the U. S. Navys surface combatant fleet, were on active duty in nearly 20 navies. The firm was founded as Gibbs Brothers by self-taught naval architect William Francis Gibbs, the name was changed when architect Daniel H. Cox of Cox & Stevens joined the firm in 1929. In 1931, Gibbs & Cox designed the MV Savarona, a luxury yacht. According to company officials, more than 70 percent of U. S. tonnage launched during World War II was built to Gibbs & Cox designs, ship types included destroyers, LST landing craft, minesweepers, tankers, cruisers, Liberty Ships, and a variety of conversions. In 1950, Gibbs & Cox designed the SS United States, the largest liner built in the United States. Of these, the most expensive and elaborate was a 1/24-scale cutaway model of the USS Agerholm and this model, which is over 16 feet long, shows the complete inner structure on the starboard, and the exterior on the port. Another notable model is the USS Missouri as she appeared on September 2,1945, at 9,02 in the morning, the time of the Japanese surrender. This 1/48-scale ship required 77,000 man-hours to construct, and is as of September 2012 on display at the Navy Museum, Washington Navy Yard, Washington, DC. Gibbs & Cox Official site
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Gridley-class destroyer
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The Gridley-class destroyers were a class of four 1500-ton destroyers in the United States Navy. They were part of a series of USN destroyers limited to 1,500 tons standard displacement by the London Naval Treaty, the first two ships were laid down on 3 June 1935 and commissioned in 1937. The second two were laid down in March 1936 and commissioned in 1938, based on the preceding Mahan-class destroyers with somewhat different machinery, they had the same hull but had only a single stack and mounted sixteen 21 inch torpedo tubes, an increase of four. To compensate for the torpedo armament weight, the gun armament was slightly reduced from five 5/38 caliber guns to four. USS Maury made the highest trial speed ever recorded for a United States Navy destroyer,42.8 knots, All four ships served extensively in World War II, notably in the Solomon Islands and the Battle of the Philippine Sea, with Maury receiving a Presidential Unit Citation. The four Gridleys were part of a series of three classes with similar characteristics laid down 1935-1937, the other two were the Bagley class and the Benham class. All three featured four 5 inch guns and sixteen 21 inch torpedo tubes in four quadruple mounts as built, although all had only one stack, they differed primarily in their machinery. The Gridleys were designed by Bethlehem Shipbuilding Company with advanced high-pressure boilers but turbines generally similar to the earlier Farragut class, the Bagleys were a Navy design that duplicated the machinery of the preceding long-range Mahan class. The Benhams were a Gibbs & Cox design with new boiler design that allowed a reduction from four boilers to three, with an efficient turbine arrangement resembling the Mahans. The Gridleys boilers were a significant upgrade from the Mahan class, with steam pressure increased from 465 psi to 565 psi, the increased steam pressure contributed to fuel economy. The boilers were Yarrow-type boilers built by Bethlehem Steel, however, the turbines were generally similar to the Farragut class, and thus were less efficient than those in the Mahan class. They were Parsons-type reaction turbines built by Bethlehem Steel, with single-reduction gearing, the result was a reduced range of 5,520 nautical miles compared to 6,940 nautical miles for the Mahans. The Gridleys introduced an armament of four 5 inch dual purpose guns in single mounts, the class was initially equipped with the Mark 11 torpedo or Mark 12 torpedo, which were replaced by the Mark 15 torpedo beginning in 1938. Their near-sisters the Bagleys and Benhams duplicated this armament, the heaviest in torpedoes ever on US destroyers, compared with the Mahans, they sacrificed one gun for four additional torpedo tubes. It was suggested that these ships could use curved ahead fire, as with most other US destroyers of this period, the 5 inch guns featured all-angle power loading and were director controlled, making them as effective as the technology allowed against aircraft. By late 1942, radio proximity fuses made them more effective. As in the last two Maurys, the two forward 5 inch guns were in enclosed mounts, while the guns were open. However, in common with all US surface combatants in the 1930s and it was apparently felt that the heavy AA armament would shoot down most incoming aircraft in all situations, but the attack on Pearl Harbor showed that this was not true
46.
Caliber (artillery)
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In artillery, caliber or calibre is the internal diameter of a gun barrel, or by extension a relative measure of the length. Rifled barrels introduce ambiguity to measurement of caliber, a rifled bore consists of alternating grooves and lands. The distance across the bore from groove to groove is greater than the distance from land to land, the depth of rifling grooves increases in larger calibers. United States Navy guns typically used rifling depth between one-half and one percent of caliber, projectile bourrelet diameter specification was 0.015 inches less than land to land diameter with a minus manufacturing tolerance so average clearance was about 0.012 inches. Driving band diameter was groove to groove diameter plus 0.02 inches, the length of the barrel is often quoted in calibers. For example, US Naval Rifles 3 in or larger, the effective length of the barrel is divided by the barrel diameter to give a dimensionless quantity.81 As an example, the main guns of the Iowa-class battleships can be referred to as 16/50 caliber. They are 16 inches in diameter and the barrel is 800 inches long, the bore to barrel length ratio is called caliber in naval gunnery,81 but is called length in army artillery. Before World War II, the US Navy used 5/51 caliber as surface-to-surface guns, by the end of World War II, the dual purpose 5/38 caliber was standard naval armament against surface and air targets. All three had a diameter of 5 inches. At sea, a weapon had to perform, without fail, there was no ready replacement, nor one that could be readily supplied. Over time, the terms of pound and bore became confused and blurred, eventually, when the technology existed, the bore came to be the standard measure. For naval rifles, the change was to actual bore. They then began to measure the length of the weapon in calibers. These were a measure of the bore of the barrel versus the rifled bore of the barrel. In other words, a 12/45 is 12×45= the length of the bore of that gun in inches. This explains the differences in both penetration and long range performance of naval rifles over the years. In addition to the improvements in overall performance, the increase in barrel length also allowed, in some circumstances. For example, the American 14/45, as introduced in the New York-class battleships, later improvements to the design, lengthening the rifle itself and also altering the breech, allowed a 1400 lb. projectile and, overall, a greater barrel life
47.
Babcock & Wilcox
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Babcock & Wilcox Enterprises is an American power generation company headquartered in Charlotte, North Carolina. The company was founded in 1867 in Providence, Rhode Island by partners Stephen Wilcox and George Babcock as Babcock, Wilcox & Company to manufacture, built nuclear-powered surface ship, NS Savannah. B&Ws boilers supply more than 300,000 megawatts of installed capacity in over 90 countries around the world, a reactor from B&W was destroyed by a nuclear meltdown in the Three Mile Island accident. During World War II, over half of the US Navy fleet was powered by Babcock & Wilcox boilers, the company has its headquarters in Charlotte, North Carolina. B&W also has joint major joint venture companies in Beijing and the Indian city of Pune, on June 30,2015, Babcock & Wilcox completed a spinoff from BWX Technologies, its former parent which is now headquartered in Lynchburg, Virginia. The two companies began trading separately on July 1, B&W employs approximately 5,700 people, in addition to several thousand joint venture employees. B&W PGG and its subsidiaries have facilities in Ohio, Wisconsin, Arona, Italy, Beijing, China, Esbjerg, Denmark, Babcock & Wilcox MEGTEC LLC B&W SPIG Diamond Power International, Inc. The boilers more safely generated higher pressure steam and was more efficient than existing designs, in 1891, Babcock & Wilcox Ltd is established as a separate United Kingdom company, to be responsible for all sales outside the US and Cuba. In 1902 the New York Citys first subway is powered by B&W boilers, during 1907 and 1909 Theodore Roosevelts Great White Fleet were powered by B&W Boilers. In 1929 B&W installs the worlds first commercial size recovery boiler using the magnesium bisulfite process in Quebec, between 1941 and 1945 B&W designed and delivered 4,100 marine boilers for combat and merchant ships, including 95 percent of the US fleet in Tokyo Bay at Japanese surrender. In 1942, the developed the cyclone furnace. Between 1943 and 1945 B&W provided components, materials and process development for Manhattan Project, between 1949 and 1952 B&W provided the 8 boilers for the SS United States, the fastest ocean liner ever constructed. Between 1953 and 1955 B&W designed and fabricated components for USS Nautilus, in 1961 B&W designed and supplied reactors for world’s first commercial nuclear ship NS Savannah. In 1962 B&W designed and furnished reactor systems for B&Ws first commercial reactor, Indian Point, in 1975 B&W designed and built components for liquid metal fast breeder reactors. In 1975 the long term agreements with the British Babcock & Wilcox Ltd were ended. Subsequently, the British company was renamed Babcock International Group plc, in 1978 B&W designed and built the nuclear reactor that was involved in the Three Mile Island accident. In 1999 B&W was awarded the contract to develop fuel cells, on February 22,2000, B&W filed for Chapter 11 bankruptcy in part as a result of thousands of claims for personal injury due to prolonged exposure to asbestos and asbestos fibers. Claims included asbestosis, lung cancer, pleural and peritoneal mesothelioma, as a condition of emerging from bankruptcy, B&W created a trust fund to compensate victims, but for amounts far less than settlements paid in individual personal injury lawsuits
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Horsepower
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Horsepower is a unit of measurement of power. There are many different standards and types of horsepower, two common definitions being used today are the mechanical horsepower, which is approximately 746 watts, and the metric horsepower, which is approximately 735.5 watts. The term was adopted in the late 18th century by Scottish engineer James Watt to compare the output of engines with the power of draft horses. It was later expanded to include the power of other types of piston engines, as well as turbines, electric motors. The definition of the unit varied among geographical regions, most countries now use the SI unit watt for measurement of power. With the implementation of the EU Directive 80/181/EEC on January 1,2010, units called horsepower have differing definitions, The mechanical horsepower, also known as imperial horsepower equals approximately 745.7 watts. It was defined originally as exactly 550 foot-pounds per second [745.7 N. m/s), the metric horsepower equals approximately 735.5 watts. It was defined originally as 75 kgf-m per second is approximately equivalent to 735.5 watts, the Pferdestärke PS is a name for a group of similar power measurements used in Germany around the end of the 19th century, all of about one metric horsepower in size. The boiler horsepower equals 9809.5 watts and it was used for rating steam boilers and is equivalent to 34.5 pounds of water evaporated per hour at 212 degrees Fahrenheit. One horsepower for rating electric motors is equal to 746 watts, one horsepower for rating Continental European electric motors is equal to 735 watts. Continental European electric motors used to have dual ratings, one British Royal Automobile Club horsepower can equal a range of values based on estimates of several engine dimensions. It is one of the tax horsepower systems adopted around Europe, the development of the steam engine provided a reason to compare the output of horses with that of the engines that could replace them. He had previously agreed to take royalties of one third of the savings in coal from the older Newcomen steam engines and this royalty scheme did not work with customers who did not have existing steam engines but used horses instead. Watt determined that a horse could turn a mill wheel 144 times in an hour, the wheel was 12 feet in radius, therefore, the horse travelled 2.4 × 2π ×12 feet in one minute. Watt judged that the horse could pull with a force of 180 pounds-force. So, P = W t = F d t =180 l b f ×2.4 ×2 π ×12 f t 1 m i n =32,572 f t ⋅ l b f m i n. Watt defined and calculated the horsepower as 32,572 ft·lbf/min, Watt determined that a pony could lift an average 220 lbf 100 ft per minute over a four-hour working shift. Watt then judged a horse was 50% more powerful than a pony, engineering in History recounts that John Smeaton initially estimated that a horse could produce 22,916 foot-pounds per minute
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