Tazewell County, Illinois
Tazewell County is a county in the U. S. state of Illinois. According to the 2010 census, it had a population of 135,394, its county seat and largest city is Pekin. It is pronounced with a short "a", to rhyme with "razz" rather than "raze". Tazewell County is part of IL Metropolitan Statistical Area; the majority of the population lives along the county's western border. Tazewell County was formed out of Peoria County in 1827; the consensus appears to be that it was named in honor of Littleton Tazewell, who served in the U. S. Senate, who became Governor of Virginia in 1834, it is, possible that it was named after Littleton's father, prominent Virginia politician Henry Tazewell, after whom Tazewell County, was named. According to the U. S. Census Bureau, the county has a total area of 658 square miles, of which 649 square miles is land and 9.0 square miles is water. In recent years, average temperatures in the county seat of Pekin have ranged from a low of 14 °F in January to a high of 86 °F in July, although a record low of −27 °F was recorded in January 1884 and a record high of 113 °F was recorded in July 1936.
Average monthly precipitation ranged from 1.50 inches in January to 4.17 inches in May. Woodford County McLean County Logan County Mason County Fulton County Peoria County The following public-use airports are located in Tazewell County: Pekin Municipal Airport - serves Pekin Manito Mitchell Airport - serves Manito, a village in Mason County As of the 2010 United States Census, there were 135,394 people, 54,146 households, 37,163 families residing in the county; the population density was 208.6 inhabitants per square mile. There were 57,516 housing units at an average density of 88.6 per square mile. The racial makeup of the county was 96.2% white, 1.0% black or African American, 0.7% Asian, 0.3% American Indian, 0.5% from other races, 1.3% from two or more races. Those of Hispanic or Latino origin made up 1.9% of the population. In terms of ancestry, 35.6% were German, 15.6% were American, 14.4% were Irish, 12.0% were English. Of the 54,146 households, 31.4% had children under the age of 18 living with them, 54.2% were married couples living together, 10.2% had a female householder with no husband present, 31.4% were non-families, 26.3% of all households were made up of individuals.
The average household size was 2.45 and the average family size was 2.94. The median age was 39.8 years. The median income for a household in the county was $54,232 and the median income for a family was $66,764. Males had a median income of $50,372 versus $34,747 for females; the per capita income for the county was $27,036. About 6.3% of families and 7.9% of the population were below the poverty line, including 11.2% of those under age 18 and 4.5% of those age 65 or over. Delavan East Peoria Morton Marquette Heights Pekin Washington Heritage Lake Allentown Dillon Groveland Normandale Parkland Schaeferville Winkel Tazewell County is divided into these townships: Tazewell County has been solidly Republican on the national level, voting for the Republican candidate since 1996. National Register of Historic Places listings in Tazewell County, Illinois
Federal Aviation Administration
The Federal Aviation Administration is a governmental body of the United States with powers to regulate all aspects of civil aviation in that nation as well as over its surrounding international waters. Its powers include the construction and operation of airports, air traffic management, the certification of personnel and aircraft, the protection of U. S. assets during the launch or re-entry of commercial space vehicles. Powers over neighboring international waters were delegated to the FAA by authority of the International Civil Aviation Organization. Created in August 1958, the FAA replaced the former Civil Aeronautics Administration and became an agency within the US Department of Transportation; the FAA's roles include: Regulating U. S. commercial space transportation Regulating air navigation facilities' geometric and flight inspection standards Encouraging and developing civil aeronautics, including new aviation technology Issuing, suspending, or revoking pilot certificates Regulating civil aviation to promote transportation safety in the United States through local offices called Flight Standards District Offices Developing and operating a system of air traffic control and navigation for both civil and military aircraft Researching and developing the National Airspace System and civil aeronautics Developing and carrying out programs to control aircraft noise and other environmental effects of civil aviation The FAA is divided into four "lines of business".
Each LOB has a specific role within the FAA. Airports: plans and develops projects involving airports, overseeing their construction and operations. Ensures compliance with federal regulations. Air Traffic Organization: primary duty is to safely and efficiently move air traffic within the National Airspace System. ATO employees manage air traffic facilities including Airport Traffic Control Towers and Terminal Radar Approach Control Facilities. See Airway Operational Support. Aviation Safety: Responsible for aeronautical certification of personnel and aircraft, including pilots and mechanics. Commercial Space Transportation: ensures protection of U. S. assets during the launch or reentry of commercial space vehicles. The FAA is headquartered in Washington, D. C. as well as the William J. Hughes Technical Center in Atlantic City, New Jersey, the Mike Monroney Aeronautical Center in Oklahoma City and its nine regional offices: Alaskan Region – Anchorage, Alaska Northwest Mountain – Seattle, Washington Western Pacific – Los Angeles, California Southwest – Fort Worth, Texas Central – Kansas City, Missouri Great Lakes – Chicago, Illinois Southern – Atlanta, Georgia Eastern – New York, New York New England – Boston, Massachusetts The Air Commerce Act of May 20, 1926, is the cornerstone of the federal government's regulation of civil aviation.
This landmark legislation was passed at the urging of the aviation industry, whose leaders believed the airplane could not reach its full commercial potential without federal action to improve and maintain safety standards. The Act charged the Secretary of Commerce with fostering air commerce and enforcing air traffic rules, licensing pilots, certifying aircraft, establishing airways, operating and maintaining aids to air navigation; the newly created Aeronautics Branch, operating under the Department of Commerce assumed primary responsibility for aviation oversight. In fulfilling its civil aviation responsibilities, the Department of Commerce concentrated on such functions as safety regulations and the certification of pilots and aircraft, it took over the building and operation of the nation's system of lighted airways, a task initiated by the Post Office Department. The Department of Commerce improved aeronautical radio communications—before the founding of the Federal Communications Commission in 1934, which handles most such matters today—and introduced radio beacons as an effective aid to air navigation.
The Aeronautics Branch was renamed the Bureau of Air Commerce in 1934 to reflect its enhanced status within the Department. As commercial flying increased, the Bureau encouraged a group of airlines to establish the first three centers for providing air traffic control along the airways. In 1936, the Bureau itself began to expand the ATC system; the pioneer air traffic controllers used maps and mental calculations to ensure the safe separation of aircraft traveling along designated routes between cities. In 1938, the Civil Aeronautics Act transferred the federal civil aviation responsibilities from the Commerce Department to a new independent agency, the Civil Aeronautics Authority; the legislation expanded the government's role by giving the CAA the authority and the power to regulate airline fares and to determine the routes that air carriers would serve. President Franklin D. Roosevelt split the authority into two agencies in 1940: the Civil Aeronautics Administration and the Civil Aeronautics Board.
CAA was responsible for ATC, airman and aircraft certification, safety enforcement, airway development. CAB was entrusted with safety regulation, accident investigation, economic regulation of the airlines; the CAA was part of the Department of Commerce. The CAB was an independent federal agency. On the eve of America's entry into World War II, CAA began to extend its ATC responsibilities to takeoff and landing operations at airports; this expanded role became permanent after the war. The application of radar to ATC helped controllers in their drive to keep abreast of the postwar boom in commercial air transportation. In 1946, Congress gave CAA the added task of administering the federal-aid airport program, the first peacetime program of financial assistance aimed exclusivel
An aircraft engine is a component of the propulsion system for an aircraft that generates mechanical power. Aircraft engines are always either lightweight piston engines or gas turbines, except for small multicopter UAVs which are always electric aircraft. In commercial aviation, the major players in the manufacturing of turbofan engines are Pratt & Whitney, General Electric, Rolls-Royce, CFM International. A major entrant into the market launched in 2016 when Aeroengine Corporation of China was formed by organizing smaller companies engaged in designing and manufacturing aircraft engines into a new state owned behemoth of 96,000 employees. In general aviation, the dominant manufacturer of turboprop engines has been Whitney. General Electric announced in 2015 entrance into the market. 1848: John Stringfellow made a steam engine for a 10-foot wingspan model aircraft which achieved the first powered flight, albeit with negligible payload. 1903: Charlie Taylor built an inline aeroengine for the Wright Flyer.
1903: Manly-Balzer engine sets standards for radial engines. 1906: Léon Levavasseur produces a successful water-cooled V8 engine for aircraft use. 1908: René Lorin patents a design for the ramjet engine. 1908: Louis Seguin designed the Gnome Omega, the world's first rotary engine to be produced in quantity. In 1909 a Gnome powered Farman III aircraft won the prize for the greatest non-stop distance flown at the Reims Grande Semaine d'Aviation setting a world record for endurance of 180 kilometres. 1910: Coandă-1910, an unsuccessful ducted fan aircraft exhibited at Paris Aero Salon, powered by a piston engine. The aircraft never flew, but a patent was filed for routing exhaust gases into the duct to augment thrust. 1914: Auguste Rateau suggests using exhaust-powered compressor – a turbocharger – to improve high-altitude performance. VI heavy bomber becomes the earliest known supercharger-equipped aircraft to fly, with a Mercedes D. II straight-six engine in the central fuselage driving a Brown-Boveri mechanical supercharger for the R.30/16's four Mercedes D.
IVa engines. 1918: Sanford Alexander Moss picks up Rateau's idea and creates the first successful turbocharger 1926: Armstrong Siddeley Jaguar IV, the first series-produced supercharged engine for aircraft use. 1930: Frank Whittle submitted his first patent for a turbojet engine. June 1939: Heinkel He 176 is the first successful aircraft to fly powered by a liquid-fueled rocket engine. August 1939: Heinkel HeS 3 turbojet propels the pioneering German Heinkel He 178 aircraft. 1940: Jendrassik Cs-1, the world's first run of a turboprop engine. It is not put into service. 1943 Daimler-Benz DB 670, first turbofan runs 1944: Messerschmitt Me 163B Komet, the world's first rocket-propelled combat aircraft deployed. 1945: First turboprop-powered aircraft flies, a modified Gloster Meteor with two Rolls-Royce Trent engines. 1947: Bell X-1 rocket-propelled aircraft exceeds the speed of sound. 1948: 100 shp 782, the first turboshaft engine to be applied to aircraft use. 1949: Leduc 010, the world's first ramjet-powered aircraft flight.
1950: Rolls-Royce Conway, the world's first production turbofan, enters service. 1968: General Electric TF39 high bypass turbofan enters service delivering greater thrust and much better efficiency. 2002: HyShot scramjet flew in dive. 2004: NASA X-43, the first scramjet to maintain altitude. In this entry, for clarity, the term "inline engine" refers only to engines with a single row of cylinders, as used in automotive language, but in aviation terms, the phrase "inline engine" covers V-type and opposed engines, is not limited to engines with a single row of cylinders; this is to differentiate them from radial engines. A straight engine has an number of cylinders, but there are instances of three- and five-cylinder engines; the greatest advantage of an inline engine is that it allows the aircraft to be designed with a low frontal area to minimize drag. If the engine crankshaft is located above the cylinders, it is called an inverted inline engine: this allows the propeller to be mounted high up to increase ground clearance, enabling shorter landing gear.
The disadvantages of an inline engine include a poor power-to-weight ratio, because the crankcase and crankshaft are long and thus heavy. An in-line engine may be either air-cooled or liquid-cooled, but liquid-cooling is more common because it is difficult to get enough air-flow to cool the rear cylinders directly. Inline engines were common in early aircraft. However, the inherent disadvantages of the design soon became apparent, the inline design was abandoned, becoming a rarity in modern aviation. For other configurations of aviation inline engine, such as U-engines, H-engines, etc.. See Inline engine. Cylinders in this engine are arranged in two in-line banks tilted 60–90 degrees apart from each other and driving a common crankshaft; the vast majority of V engines are water-cooled. The V design provides a higher power-to-weight ratio than an inline engine, while still providing a small frontal area; the most famous example of this design is the legendary Rolls-Royce Merlin engine, a 27-litre 60° V12 engine used in, among others, the Spitfires that played a major role in the Battle of Britain.
A horizontally opposed engine called a flat or boxer engine, ha
According to the International Civil Aviation Organization, a runway is a "defined rectangular area on a land aerodrome prepared for the landing and takeoff of aircraft". Runways may be a natural surface. In January 1919, aviation pioneer Orville Wright underlined the need for "distinctly marked and prepared landing places, the preparing of the surface of reasonably flat ground an expensive undertaking there would be a continuous expense for the upkeep." Runways are named by a number between 01 and 36, the magnetic azimuth of the runway's heading in decadegrees. This heading differs from true north by the local magnetic declination. A runway numbered 09 points east, runway 18 is south, runway 27 points west and runway 36 points to the north; when taking off from or landing on runway 09, a plane is heading around 90°. A runway can be used in both directions, is named for each direction separately: e.g. "runway 15" in one direction is "runway 33" when used in the other. The two numbers differ by 18.
For clarity in radio communications, each digit in the runway name is pronounced individually: runway one-five, runway three-three, etc.. A leading zero, for example in "runway zero-six" or "runway zero-one-left", is included for all ICAO and some U. S. military airports. However, most U. S. civil aviation airports drop the leading zero. This includes some military airfields such as Cairns Army Airfield; this American anomaly may lead to inconsistencies in conversations between American pilots and controllers in other countries. It is common in a country such as Canada for a controller to clear an incoming American aircraft to, for example, runway 04, the pilot read back the clearance as runway 4. In flight simulation programs those of American origin might apply U. S. usage to airports around the world. For example, runway 05 at Halifax will appear on the program as the single digit 5 rather than 05. If there is more than one runway pointing in the same direction, each runway is identified by appending left and right to the number to identify its position — for example, runways one-five-left, one-five-center, one-five-right.
Runway zero-three-left becomes runway two-one-right. In some countries, regulations mandate that where parallel runways are too close to each other, only one may be used at a time under certain conditions. At large airports with four or more parallel runways some runway identifiers are shifted by 1 to avoid the ambiguity that would result with more than three parallel runways. For example, in Los Angeles, this system results in runways 6L, 6R, 7L, 7R though all four runways are parallel at 69°. At Dallas/Fort Worth International Airport, there are five parallel runways, named 17L, 17C, 17R, 18L, 18R, all oriented at a heading of 175.4°. An airport with only three parallel runways may use different runway identifiers, such as when a third parallel runway was opened at Phoenix Sky Harbor International Airport in 2000 to the south of existing 8R/26L — rather than confusingly becoming the "new" 8R/26L it was instead designated 7R/25L, with the former 8R/26L becoming 7L/25R and 8L/26R becoming 8/26.
Runway designations may change over time because Earth's magnetic lines drift on the surface and the magnetic direction changes. Depending on the airport location and how much drift occurs, it may be necessary to change the runway designation; as runways are designated with headings rounded to the nearest 10°, this affects some runways sooner than others. For example, if the magnetic heading of a runway is 233°, it is designated Runway 23. If the magnetic heading changes downwards by 5 degrees to 228°, the runway remains Runway 23. If on the other hand the original magnetic heading was 226°, the heading decreased by only 2 degrees to 224°, the runway becomes Runway 22; because magnetic drift itself is slow, runway designation changes are uncommon, not welcomed, as they require an accompanying change in aeronautical charts and descriptive documents. When runway designations do change at major airports, it is changed at night as taxiway signs need to be changed and the huge numbers at each end of the runway need to be repainted to the new runway designators.
In July 2009 for example, London Stansted Airport in the United Kingdom changed its runway designations from 05/23 to 04/22 during the night. For fixed-wing aircraft it is advantageous to perform takeoffs and landings into the wind to reduce takeoff or landing roll and reduce the ground speed needed to attain flying speed. Larger airports have several runways in different directions, so that one can be selected, most nearly aligned with the wind. Airports with one runway are constructed to be aligned with the prevailing wind. Compiling a wind rose is in fact one of the preliminary steps taken in constructing airport runways. Note that wind direction is given as the direction the wind is coming from: a plane taking off from runway 09 faces east, into an "east wind" blowing from 090°. Runway dimensions vary from as small as 245 m long and 8 m wide in s
An air taxi is a small commercial aircraft which makes short flights on demand. In 2001 air taxi operations were promoted in the United States by a NASA and aerospace industry study on the potential Small Aircraft Transportation System and the rise of light-jet aircraft manufacturing. In Canada, air taxi operations are regulated by Transport Canada under Canadian Aviation Regulation 703; the Canadian definition of air taxi includes all commercial single engined aircraft, multi-engined helicopters flown by day visual flight rules by one pilot and all multi-engined, non-turbo-jet aircraft, with a maximum take-off weight 8,618 kg or less and nine or fewer passenger seats, that are used to transport people or goods or for sightseeing. In the US, air taxi and air charter operations are governed by Part 135 of the Federal Aviation Regulations, unlike the larger scheduled air carriers which are governed by more stringent standards of FAR Part 121. Air Taxi Association Commercial aviation General aviation Very light jet NCFlyPorts Passenger drone Fractional Jets ImagineAir Propair Skymax Airstream Jets
The hectare is an SI accepted metric system unit of area equal to a square with 100-metre sides, or 10,000 m2, is used in the measurement of land. There are 100 hectares in one square kilometre. An acre is about 0.405 hectare and one hectare contains about 2.47 acres. In 1795, when the metric system was introduced, the "are" was defined as 100 square metres and the hectare was thus 100 "ares" or 1⁄100 km2; when the metric system was further rationalised in 1960, resulting in the International System of Units, the are was not included as a recognised unit. The hectare, remains as a non-SI unit accepted for use with the SI units, mentioned in Section 4.1 of the SI Brochure as a unit whose use is "expected to continue indefinitely". The name was coined from the Latin ārea; the metric system of measurement was first given a legal basis in 1795 by the French Revolutionary government. The law of 18 Germinal, Year III defined five units of measure: The metre for length The are for area The stère for volume of stacked firewood The litre for volumes of liquid The gram for massIn 1960, when the metric system was updated as the International System of Units, the are did not receive international recognition.
The International Committee for Weights and Measures makes no mention of the are in the current definition of the SI, but classifies the hectare as a "Non-SI unit accepted for use with the International System of Units". In 1972, the European Economic Community passed directive 71/354/EEC, which catalogued the units of measure that might be used within the Community; the units that were catalogued replicated the recommendations of the CGPM, supplemented by a few other units including the are whose use was limited to the measurement of land. The names centiare, deciare and hectare are derived by adding the standard metric prefixes to the original base unit of area, the are; the centiare is one square metre. The deciare is ten square metres; the are is a unit of area, used for measuring land area. It was defined by older forms of the metric system, but is now outside the modern International System of Units, it is still used in colloquial speech to measure real estate, in particular in Indonesia, in various European countries.
In Russian and other languages of the former Soviet Union, the are is called sotka. It is used to describe the size of suburban dacha or allotment garden plots or small city parks where the hectare would be too large; the decare is derived from deca and are, is equal to 10 ares or 1000 square metres. It is used in Norway and in the former Ottoman areas of the Middle East and the Balkans as a measure of land area. Instead of the name "decare", the names of traditional land measures are used, redefined as one decare: Stremma in Greece Dunam, donum, or dönüm in Israel, Jordan, Lebanon and Turkey Mål is sometimes used for decare in Norway, from the old measure of about the same area; the hectare, although not a unit of SI, is the only named unit of area, accepted for use within the SI. In practice the hectare is derived from the SI, being equivalent to a square hectometre, it is used throughout the world for the measurement of large areas of land, it is the legal unit of measure in domains concerned with land ownership and management, including law, agriculture and town planning throughout the European Union.
The United Kingdom, United States, to some extent Canada use the acre instead. Some countries that underwent a general conversion from traditional measurements to metric measurements required a resurvey when units of measure in legal descriptions relating to land were converted to metric units. Others, such as South Africa, published conversion factors which were to be used "when preparing consolidation diagrams by compilation". In many countries, metrication clarified existing measures in terms of metric units; the following legacy units of area have been redefined as being equal to one hectare: Jerib in Iran Djerib in Turkey Gong Qing in Hong Kong / mainland China Manzana in Argentina Bunder in The Netherlands The most used units are in bold. One hectare is equivalent to: 1 square hectometre 15 mǔ or 0.15 qǐng 10 dunam or dönüm 10 stremmata 6.25 rai ≈ 1.008 chō ≈ 2.381 feddan Conversion of units Hecto- Hectometre Order of magnitude Official SI website: Table 6. Non-SI units accepted for use with the International System of Units
Central business district
A central business district is the commercial and business center of a city. In larger cities, it is synonymous with the city's "financial district". Geographically, it coincides with the "city centre" or "downtown", but the two concepts are separate: many cities have a central business district located away from its commercial or cultural city centre or downtown; the CBD is also the "city centre" or "downtown", but this is often not the case. Midtown Manhattan is the largest central business district in the world. For example, London's "city centre" is regarded as encompassing the historic City of London and the mediaeval City of Westminster, whereas the City of London and the transformed Docklands area are regarded as its two CBDs. Mexico City has a historic city centre, the colonial-era Centro Histórico, along with two CBDs: the mid-late 20th century Paseo de la Reforma - Polanco, the new Santa Fe; the shape and type of a CBD always reflect the city's history. Cities with strong preservation laws and maximum building height restrictions to retain the character of the historic and cultural core will have a CBD quite a distance from the centre of the city.
This is quite common for European cities such as Vienna. In cities in the New World that grew after the invention of mechanised modes such as road or rail transport, a single central area or downtown will contain most of the region's tallest buildings and act both as the CBD and the commercial and cultural city center. Increasing urbanisation in the 21st century have developed megacities in Asia, that will have multiple CBDs scattered across the urban area, it has been said. No two CBDs look alike in terms of their spatial shape, however certain geometric patterns in these areas are recurring throughout many cities due to the nature of centralised commercial and industrial activities. In Australia the acronym CBD is used commonly to refer to major city "centres", it is used in particular to refer to the skyscraper districts in state capital cities such as Melbourne, Perth and Sydney. Melbourne is Australia's largest CBD with Sydney second and Brisbane third when judged by area size; the iTowers of Masa Square CBD were built for doing business tasks only.
It is located within Gaborone. In China terms "city centre" are used but a different commercial district outside of the historic core called a "CBD" or "Financial District" may exist. Large Chinese cities have multiple CBDs spread throughout the urban area. Cities traditionally being major cultural centres with many historic structures in the core such as Beijing, Suzhou or Xi'an will have the greenfield CBDs built adjacent to the urban core, similar to European cities. While other cities such as Guangzhou, Shanghai and Wuhan the city centre will house a number of CBDs in addition to greenfield CBDs built in the periphery. In France, the term « quartier d’affaires » may be used to describe the central business district; the main ones business districts in the country are as following: La Défense in Paris, which with 3,300,000 square metres of office space is Europe's leading business district in terms of area. La Part-Dieu in Lyon, is the 2nd largest business district in France and has nearly 1,600,000 square metres.
Euralille in Lille, is the 3rd business district of France with 1,120,000 square metres of offices. Euroméditerranée in Marseille, is the 4th business district in France with 650,000 square metres of offices. In Germany, the terms Innenstadt and Stadtzentrum may be used to describe the central business district. Both terms can be translated to mean "inner city" and "city centre"; some of the larger cities have more than one central business district, like Berlin, which has three. Due to Berlin's history of division during the Cold War, the city contains central business districts both in West and East Berlin, as well as a newly-built business centre near Potsdamer Platz; the city's historic centre — the location of the Reichstag building, as well as the Brandenburg gate and most federal ministries — was abandoned when the Berlin Wall cut through the area. Only after the reunification with the redevelopment of Potsdamer Platz, the construction of numerous shopping centers, government ministries, office buildings and entertainment venues, was the area revived.
In Frankfurt, there is a business district, in the geographical centre of the city and it is called the Bankenviertel. In Düsseldorf, there is a business district, located around the famous High-Street Königsallee with banks and offices. In Hong Kong, Sheung Wan and Causeway Bay are considered as the central business districts of Victoria City; the Yau Tsim Mong District has been considered the city centre of Kowloon before another core emerged in Cheung Sha Wan. As part of the Airport Core Programme, the Union Square project launched by the MTR Corporation has brought it another CBD in West Kowloon. With the latest implementation of "Energising Kowloon East" Scheme by the Hong Kong Government, Kowloon Bay and Kwun Tong Business Area have been redeveloped and transformed into CBDs; the CBDs of new towns and satellite cities such as Tuen Mun, Sha Tin and Tung Chung have been characterised by sky-scraping residential blocks on top of large shopping centres that provide services to local resi