1.
Weymann Fabric Bodies
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Weymann Fabric Bodies is a patented design system for fuselages for aircraft and superlight coachwork for motor vehicles. The system used a wood frame covered in fabric. It was popular on cars from the 1920s until the early 1930s as it reduced the usual squeaks, Fabric provided a matt surface and the framework sharp corners. Introduced to the market in 1921, Weymanns bodies fell out of popularity within a decade, the Weymann system comprises an ultra-light wood framework with special metal joints so that timber does not touch timber. Small metal panels are inserted between the fabric and the framework to make rounded external corners, straining wires are fitted to hold the doors in shape when they are stressed by acceleration or bumps. Any exposed joints in the fabric are covered with aluminium mouldings, the seats are fixed directly to the chassis. Passengers were therefore in almost direct contact with the firmly mounted engine, where the market permitted some isolation was provided by luxuriously sprung passenger-seating often topped with inflated pneumatic cushions. An early portrait may be seen in the archives of FLIGHT magazine, daimler had always built their own bodies though as usual in that period to suit customers they provided a large number of chassis to external coach builders. Seats were Dryad basket-chairs of wicker button-quilted in Bedford cord, daimler chose to name its Weymann bodies Construction Z. The licensing company which provided customers with permits to make Weymann fabric bodies for fitting to chassis was based in Paris, Weymann claimed 123 licensees of his patents and that he received payment for around 70,000 bodies. Licensed manufacturers included, Weymann Motor Bodies limited, founded in England in 1922 with the first licences issued in 1923 to, amongst others, the Rover Company. In 1925 a move was made into actual body production as well as licensing, the enterprise was a success and a move was made to larger premises at what had been the Blériot aircraft factory, Addlestone near Weybridge, Surrey, England. By 1930 the company had turned its attention to bus body construction, Weymann American Body Company of Indianapolis, USA Carrozzeria Touring, Milan Lombardy Italy and its own development, Superleggera. The Weymann Story, Part One - 1923-1945, coachbuilt Weymann American Voisin C7 under restoration
2.
H. J. Mulliner & Co.
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H. J. Mulliner & Co. was a well-known British coachbuilder operating from Bedford Park, Chiswick, West London. The company which owned it was formed by H J Mulliner in 1897, in December 1909 the controlling interest in this company passed to John Croall & Sons of Edinburgh. Croall sold that interest to Rolls-Royce in 1959, Mulliner is now the personal commissioning department for Bentley. Henry Jervis Mulliner, born in Liverpool but raised in Chiswick, was the son of Robert Bouverie Mulliner from Northampton, third son of Francis Mulliner of Leamington Spa. His son H J Mulliner incorporated his own company in 1897 while with Mulliner London Limited and he found a special interest in the automobile side of that business and expanded in 1900 by buying from Mulliner London Limited the Mulliner showroom in Brook Street, Mayfair, London. The location was convenient for his clients than Chiswick. One of the clients was C. S. Rolls who had a built on a Rolls-Royce Silver Ghost for his own use. In 1906 the London works were moved from Mayfair to Chiswick, a family connection was maintained as Croall employed H J Mulliners wifes brother, Frank Piesse, to run the company. Although bodies were fitted to chassis, by the 1930s virtually the entire output was being fitted to Rolls-Royce. Rolls-Royce acquired Mulliner in July 1959 and merged it with Park Ward which they had owned since 1939 forming Mulliner Park Ward in 1961, a financial columnist noted that the outlay for Rolls-Royce was relatively small as the net assets of John Croall were around £250,000. It was noted that Mulliner was one of the last independent coach builders, others being controlled by motor manufacturers or distributors
3.
Bentley
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Bentley Motors Limited is a British manufacturer and marketer of luxury cars and SUVs—and a subsidiary of Volkswagen AG since 1998. The joining and eventual separation of Bentley and Rolls-Royce follows a series of mergers and acquisitions, beginning with the 1931 purchase by Rolls-Royce of Bentley, Rolls-Royce Motors was subsequently sold to engineering conglomerate, Vickers and in 1998, Vickers sold Rolls-Royce to Volkswagen AG. The aerospace company, Rolls-Royce Plc, ultimately sold both to BMW AG, at the DFP factory, in 1913, he noticed an aluminum paperweight and thought that aluminum might be a suitable replacement for cast iron to fabricate lighter pistons. The first Bentley aluminum pistons were fitted to Sopwith Camel aero engines during World War I, in August 1919, W. O. registered Bentley Motors Ltd. and in October he exhibited a car chassis, with dummy engine, at the London Motor Show. Ex–Royal Flying Corps officer Clive Gallop designed an innovative 4 valves per cylinder engine for the chassis, by December the engine was built and running. Delivery of the first cars was scheduled for June 1920, the durability of the first Bentley cars earned widespread acclaim and they competed in hill climbs and raced at Brooklands. Bentleys first major event was the 1922 Indianapolis 500, a race dominated by specialized cars with Duesenberg racing chassis and they entered a modified road car driven by works driver, Douglas Hawkes, accompanied by riding mechanic, H. S. Bertie Browning. Hawkes completed the full 500 miles and finished 13th with an speed of 74.95 mph after starting in 19th position. The team was rushed back to England to compete in the 1922 RAC Tourist Trophy. In ironic reference to his heavyweight boxers stature, Captain Woolf Barnato was nicknamed Babe, in 1925, he acquired his first Bentley, a 3-litre. With this car he won numerous Brooklands races, just a year later he acquired the Bentley business itself. The Bentley enterprise was always underfunded, but inspired by the 1924 Le Mans win by John Duff and Frank Clement, Barnato had incorporated Baromans Ltd in 1922, which existed as his finance and investment vehicle. Via Baromans, Barnato initially invested in excess of £100,000, saving the business, a financial reorganisation of the original Bentley company was carried out and all existing creditors paid off for £75,000. Existing shares were devalued from £1 each to just 1 shilling, Barnato held 149,500 of the new shares giving him control of the company and he became chairman. Barnato injected further cash into the business, £35,000 secured by debenture in July 1927, £40,000 in 1928, with renewed financial input, W. O. Bentley was able to design another generation of cars. The Bentley Boys were a group of British motoring enthusiasts that included Woolf Barnato, Sir Henry Tim Birkin, steeple chaser George Duller, aviator Glen Kidston, sammy Davis, and Dr Dudley Benjafield. The Bentley Boys, favored Bentley cars, many were independently wealthy and often had a military background. They kept the reputation for high performance alive, Bentley was noted for its four consecutive victories at the 24 Hours of Le Mans from 1927 to 1930
4.
Automotive design
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Automotive design is the profession involved in the development of the appearance, and to some extent the ergonomics, of motor vehicles or more specifically road vehicles. This most commonly refers to automobiles but also refers to motorcycles, trucks, buses, coaches, the functional design and development of a modern motor vehicle is typically done by a large team from many different disciplines included within automotive engineering. Automotive design in context is primarily concerned with developing the visual appearance or aesthetics of the vehicle. Automotive design is practiced by designers who usually have an art background, the task of the design team is usually split into three main aspects, exterior design, interior design, and color and trim design. Graphic design is also an aspect of design, this is generally shared amongst the design team as the lead designer sees fit. Design focuses not only on the outer shape of automobile parts. The aesthetic value will need to correspond to ergonomic functionality and utility features as well, though not all the new vehicular gadgets are to be designated as factory standard items, some of them may be integral to determining the future course of any specific vehicular models. The stylist responsible for the design of the exterior of the vehicle develops the proportions, shape, Exterior design is first done by a series of digital or manual drawings. Progressively, drawings that are more detailed are executed and approved by appropriate layers of management, Clay and or digital models are developed from, and along with the drawings. The data from these models are used to create a full sized mock-up of the final design. With three- and five-axis CNC milling machines, the model is first designed in a computer program and then carved using the machine. Even in times of high-class 3d software and virtual models on power walls, here the emphasis is on ergonomics and the comfort of the passengers. The procedure here is the same as with exterior design, the color and trim designer is responsible for the research, design, and development of all interior and exterior colors and materials used on a vehicle. These include paints, plastics, fabric designs, leather, grains, carpet, headliner, wood trim, Color, contrast, texture, and pattern must be carefully combined to give the vehicle a unique interior environment experience. Designers work closely with the exterior and interior designers, designers draw inspiration from other design disciplines such as, industrial design, fashion, home furnishing, architecture, and sometimes product design. Specific research is done into global trends to design for two to three model years in the future. Trend boards are created from research in order to keep track of design influences as they relate to the automotive industry. The designer then uses this information to develop themes and concepts that are further refined and tested on the vehicle models
5.
W. O. Bentley
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Walter Owen Bentley, MBE was an English engineer who designed engines for cars and aircraft, raced cars and motorcycles, and founded Bentley Motors Limited in Cricklewood near London. He was known as W. O. without any need to add the word Bentley, Bentley, born in Hampstead, London, was the youngest of his Adelaide-born parents’ nine children. His father was retired businessman Alfred Bentley, and mother was Emily and he later recalled, The sight of one of Patrick Stirlings eight-foot singles could move me profoundly. My longest day, ” he said, “was London to Leeds and back and this was a total days run of 400 miles, entailing a consumption of about seven tons of coal, every pound of it to be shovelled. He completed his apprenticeship in the summer of 1910 but decided that the railways did not offer him enough scope for a satisfying career, in 1909 and 1910 Bentley raced Quadrant, Rex, and Indian motorcycles. He competed in two Isle of Man Tourist Trophy races, on a Rex in 1909 and as a member of Indians factory team in 1910 and he was fascinated by the cabbies ingenuity at fiddling the meters. In 1912 he joined his brother, H. M. Bentley, fitted with the alloy pistons and a modified camshaft, a DFP took several records at Brooklands in 1913 and 1914. As security considerations prevented his broadcasting the information to engine manufacturers and that man, Commander Wilfred Briggs, would be his senior officer throughout the war. Bentley next visited Louis Coatalen at Sunbeam, with the result that the innovation was used in all their aero engines. Bentley also visited Gwynnes, whose Chiswick factory made French Clerget engines under licence, when the Clerget licensees proved unwilling to implement Bentley’s more important suggestions the Navy gave him a team to design his own aero engine at the Humber factory in Coventry. Designated the BR1, Bentley Rotary 1, the engine was different from the Clerget except in the design of the cam mechanism. A prototype was running in the summer of 1916. The bigger BR2 followed in early 1918, in recognition, Bentley was awarded the MBE. After he was invited In 1920 to make a claim, which the Clerget licensees contested unsuccessfully, after the war, in early 1919, W. O. and his brother founded Bentley Motors Limited. They formed a group at small premises in Cricklewood to turn his aero engines business into one of car production, in a group that included Frank Burgess and Harry Varley, they set about designing a high quality sporting tourer for production under the name Bentley Motors. Clive Gallop joined the team as a designer to help develop their 3,000 cubic centimetres straight-4 engine. The 3-litre engine ran for the first time in New Street Mews, Baker Street, a plaque marks the building in what is now Chagford Street NW1. W. O. ’s first complete Bentley 3 Litre car began road tests in January 1920, W. O. ’s motto was To build a good car, a fast car, the best in class.95 mph
6.
Car classification
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Governments and private organizations have developed car classification schemes that are used for innumerable purposes including regulation, description and categorization, among others. This article details commonly used classification schemes in use worldwide, vehicles can be categorized in numerous ways. Regulatory agencies may also establish a vehicle classification system for determining a tax amount, in the United Kingdom, a vehicle is taxed according to the vehicles construction, engine, weight, type of fuel and emissions, as well as the purpose for which it is used. Other jurisdictions may determine vehicle tax based upon environmental principles, such as the user pays principle, another standard for road vehicles of all types that is used internationally, is ISO 3833-1977. In the United States, since 2010 the Insurance Institute for Highway Safety uses a scheme it has developed that takes into account a combination of both shadow and weight. The United States Federal Highway Administration has developed a scheme used for automatically calculating road use tolls. There are two categories depending on whether the vehicle carries passengers or commodities. Vehicles that carry commodities are further subdivided by number of axles and number of units, the United States Environmental Protection Agency has developed a classification scheme used to compare fuel economy among similar vehicles. Passenger vehicles are classified based on a total interior passenger. Trucks are classified based upon their gross vehicle weight rating, heavy duty vehicles are not included within the EPA scheme. A similar set of classes is used by the Canadian EPA, in Australia, the Federal Chamber of Automotive Industries publishes its own classifications. This is a table listing several different methods of vehicle classification. Straddling the boundary between car and motorbike, these vehicles have engines under 1.0 litre, typically only two passengers, and are sometimes unorthodox in construction. Some microcars are three-wheelers, while the majority have four wheels, microcars were popular in post-war Europe, where their appearance led them to be called Bubble cars. More recent microcars are often electric powered, the size of ultracompact cars will be less than minicars, but have engine greater than 50cc displacement and able to transport 1 or 2 persons. Ultracompact cars cannot use standard, because of strict safety standards for minicars. The regulation about running capacity and safety performance of cars will be published in early autumn. Today, there are smaller than ultracompact cars, called category-1 motorized vehicles which it has 50cc displacement or less
7.
Luxury vehicle
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Luxury vehicle is a marketing term for a vehicle that provides luxury — pleasant or desirable features beyond strict necessity — at increased expense. The term is also broad, highly variable and relative and it is a perceptual, conditional and subjective attribute that may be comprehended differently by different people, What is a luxury car to some. Therefore, automakers differentiate among their product lines in collusion with the car-buying public, while a high price is the most frequent factor, it is styling, engineering, and even public opinion which cars had the highest and lowest status associated with them. Every era in history has had a group of car marques and models that have been expensive to purchase, due to their alleged superiority of their design. Aimed at wealthy buyers, such automobiles might be generically termed luxury cars and this term is also used for unique vehicles produced during an era when luxury was individualistic consideration, and coachwork could be tailored to an owner like a bespoke suit. Although there is literature about specific marques, there is a lack of systematic. Luxury vehicle makers may either be stand-alone companies in their own right, such as BMW and Mercedes-Benz, badge engineering is often used for cost savings, for example, the Lincoln vehicles that are based on Ford platforms or Acura models derived from Honda. Though widely used, the term luxury is broad and highly variable and it is a perceptual, conditional and subjective attribute and may be understood differently by different people, What is a luxury car to some. According to the European Commission, the luxury segment is classified as F-segment. However, the boundaries between the segments are increasingly becoming blurred and diluted as features once exclusive to luxury vehicles become standard equipment on even small cars. ACRISS is a system used by many car rental companies in the US for classifying vehicles. The system includes Luxury and Premium categories, Australia, In Australia, for taxation purposes a luxury car is defined as a passenger car whose value exceeds a certain threshold. France, In France the term voiture de luxe is used, Germany, In Germany the term Upper class is used. Russia, Russian markets use the term representative class vehicle, the classification varies, for instance Consumer Guide Automotive in the U. S. The premium compact segment is targeted at a market of consumers who found the existing entry-level luxury offerings to be too expensive. By offering a smaller, lighter, more fuel-efficient, and less expensive vehicle, premium compacts introduces younger buyers to the luxury marque, in hopes of retaining the coveted customer loyalty. This includes the Acura CSX, Audi A3, Buick Verano, BMW2 Series, BMW i3, Cadillac ELR, Chrysler 200, Lexus CT, Mercedes-Benz CLA-Class, Mercedes-Benz B-Class, Saab 9-2X, and the Volvo V40. Premium compacts compete with well-equipped midsize cars, and with options they overlap much with compact executive cars, Premium compacts may share components with mass market cars from the marques parent company, and/or have less sophisticated platforms compared to upmarket vehicles in the lineup
8.
Overhead camshaft
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Compared to OHV pushrod systems with the same number of valves, the reciprocating components of the OHC system are fewer and have a lower overall mass. Though the system drives the camshafts may be more complex, most engine manufacturers accept that added complexity as a trade-off for better engine performance. The fundamental reason for the OHC valvetrain is that it offers an increase in the ability to exchange induction. Another performance advantage is gained as a result of the better optimised port configurations made possible with overhead camshaft designs, with no intrusive pushrods, the overhead camshaft cylinder head design can use straighter ports of more advantageous cross-section and length. The OHC design allows for higher speeds than comparable cam-in-block designs. The higher engine speeds thus allowed increases power output for a given torque output, in earlier OHC systems, including inter-war Morrises and Wolseleys, oil leaks in the lubrication systems were also an issue. Single overhead camshaft is a design in which one camshaft is placed within the cylinder head, in the SOHC design, the camshaft operates the valves directly, traditionally via a bucket tappet, or via an intermediary rocker arm. SOHC cylinder heads are less expensive to manufacture than double overhead camshaft cylinder heads. Timing belt replacement can be easier since there are fewer camshaft drive sprockets that need to be aligned during the replacement procedure, SOHC designs offer reduced complexity compared to overhead valve designs — when used for multivalve cylinder heads, in which each cylinder has more than two valves. Exhaust and inlet manifolds were both on the side of the engine block. This did, however, offer excellent access to the spark plugs, in the early 1980s, Toyota and Volkswagen Group also used a directly actuated, SOHC parallel valve configuration with two valves for each cylinder. The Toyota system used hydraulic tappets, the Volkswagen system used bucket tappets with shims for valve clearance adjustment. Honda later used a similar system in their motorcycles, using the term Unicam for the concept. This system uses one camshaft for each bank of cylinder heads, with the cams operating directly onto the valve and indirectly, through a short rocker arm. This allows a compact, light valvetrain to operate valves in a combustion chamber. The Unicam valve train was first used in single cylinder dirt bikes, a dual overhead camshaft valvetrain layout is characterised by two camshafts located within the cylinder head, one operating the intake valves and the other one operating the exhaust valves. This design reduces valvetrain inertia more than is the case with a SOHC engine, a DOHC design permits a wider angle between intake and exhaust valves than do SOHC engines. This can allow for a less restricted airflow at higher engine speeds, DOHC with a multivalve design also allows for the optimum placement of the spark plug which, in turn, improves combustion efficiency
9.
Straight-six engine
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The straight-six engine or inline-six engine is an internal combustion engine with the cylinders mounted in a straight line along the crankcase with all the pistons driving a common crankshaft. The bank of cylinders may be oriented at any angle, and where the bank is inclined to the vertical, the straight-six layout is the simplest engine layout that possesses both primary and secondary mechanical engine balance, resulting in much less vibration than engines with fewer cylinders. In automobiles, the design is used for engine displacements ranging from approximately 2 to 5 litres. It is also used for smaller engines but these, although very smooth running. Since the length of an engine is proportional to the number of cylinders in one bank. Pre-World War II engines could be large by modern standards — such as the Rolls Royce Silver Ghosts 7.4 L engine and the 824 cu in of the 1910s Peerless, Pierce. They were used in a variety of including the de Havilland Dragon Rapide. The largest are used to ships, and use fuel oil. The straight-six can also be viewed as a modular component of larger motors which stack several straight-sixes together, e. g. flat- or V-12s, W-18s. Straight-six engines were introduced earlier than V6 engines. While the first straight-six was manufactured in 1903 by Spyker, it was not until 1950 that a production V6 was introduced, V6s had intrinsic vibration problems not present in the straight-six. The poor secondary harmonic balance of four-cylinder engines is largely addressed with the use of balance shafts although it can never match the in-line six, TVR used a straight-six configuration exclusively in their final cars before their demise. In a reversal of trends, Mercedes-Benz announced a return to inline-6 engines in October 2016. This was a part of a trend toward higher efficiency engines with fewer cylinders, manufacturers began to replace V8 engines with straight-6 engines and V6 engines with straight-4 engines, while V8 engines became smaller. Straight-sixes continue to be used in medium to large trucks, Ford is one notable exception using a V8 in medium duty trucks. GM pickup trucks abandoned the straight-six in 1984 for the 4.3 V6, in 2002, General Motors introduced the Vortec 4200 as part of the modular straight-four, straight-five and straight-six GM Atlas engine line. It was used in their sport utility vehicles. Jeep abandoned the straight-six in 2006 with the 2006 Jeep Wrangler being the last vehicle, Ram Trucks continues to offer straight-six engines in its heavy duty pickup truck and chassis cab models, although only V6 and V8 engines are available in the smaller versions
10.
Cylinder block
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A cylinder block is an integrated structure comprising the cylinder of a reciprocating engine and often some or all of their associated surrounding structures. The term engine block is used synonymously with cylinder block. In the basic terms of elements, the various main parts of an engine are conceptually distinct. However, it is no longer the way of building most petrol engines and diesel engines, because for any given engine configuration. These generally involve integrating multiple machine elements into one discrete part and this yields lower unit cost of production. Thus engine block, cylinder block, or simply block are the likely to be heard in the garage or on the street. This evolution has occurred throughout the history of reciprocating engines, with instances of every conceptual variation coexisting here and there. The increase in prevalence of ever-more-integrated designs relied on the development of foundry. For example, a practical low-cost V8 engine was not feasible until Ford developed the techniques used to build the Ford flathead V8 engine, which soon also disseminated to the larger society. Today the foundry and machining processes for manufacturing engines are highly automated. A cylinder block is a unit comprising several cylinders, in the earliest decades of internal combustion engine development, monobloc cylinder construction was rare, cylinders were usually cast individually. Combining their castings into pairs or triples was a win of monobloc design. A wet liner cylinder block features cylinder walls that are entirely removable and they are referred to as wet liners because their outer sides come in direct contact with the engines coolant. In other words, the liner is the wall, rather than being merely a sleeve. Wet liner designs are popular with European manufacturers, most notably Renault and Peugeot, dry liner designs use either the blocks material or a discrete liner inserted into the block to form the backbone of the cylinder wall. Additional sleeves are inserted within, which dry on their outside. It is likelier to be scrapped, with new equipment—engine or entire vehicle—replacing it, most early engines, particularly those with more than four cylinders, had their cylinders cast as pairs or triplets of cylinders, then bolted to a single crankcase. As casting techniques improved, a cylinder block of 4,6
11.
Monobloc engine
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A monobloc or en bloc engine is an internal-combustion piston engine where some of the major components are formed, usually by casting, as a single integral unit, rather than being assembled later. This has the advantages of improving mechanical stiffness, and also improving the reliability of the sealing between them, monobloc techniques date back to the beginnings of the internal combustion engine. Use of the term has changed over time, usually to address the most pressing mechanical problem affecting the engines of its day, where the monobloc technique has later become the norm, the specific term falls from favour. It is now usual and un-noteworthy practice to use monobloc cylinders and crankcases, the head gasket is the most highly stressed static seal in an engine and was a source of considerable trouble in early years. The monobloc cylinder head forms both cylinder and head in one unit, thus avoiding the need for a seal, along with head gasket failure, one of the least reliable parts of the early petrol engine was the exhaust valve, which tended to fail by overheating and burning. A monobloc head could provide water cooling, thus reduced valve wear. Engines with gaskets required a metal-to-metal contact face here, disrupting water flow, the drawback to the monobloc head is that access to the inside of the combustion chamber becomes difficult. Access through the bore is restricted for machining the valve seats. An even more serious restriction is that for the task of de-coking and re-grinding the valve seats. Rather than removing the head from above, the mechanic must now remove pistons, connecting rods. One solution to this for side-valve engines was to place a screwed plug directly above each valve, the tapered threads of the screwed plug provided a reliable seal. For low-powered engines this was a solution for some years. It was difficult to cool this plug, as the water jacket didnt extend into the plug, as performance increased, it also became important to have better combustion chamber designs with less dead space. One solution was to place the spark plug in the centre of this plug, however this also placed the spark plug further away from the main combustion chamber, leading to long flame paths and slower ignition. During World War I, development of the combustion engine progressed enormously. After the war, as civilian car production recommenced, the cylinder head was required less frequently. Only high-performance cars such as the Leyland Eight of 1920 persisted with it, aircraft engines at this time were beginning to use high supercharging pressures, increasing the stress on their head gaskets. Engines such as the Rolls-Royce Buzzard used monobloc heads for reliability, the last engines to make widespread use of monobloc cylinder heads were large air-cooled aircraft radial engines, such as the Wasp Major
12.
Fuel
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A fuel is any material that can be made to react with other substances so that it releases chemical or nuclear energy as heat or to be used for work. The concept was applied solely to those materials capable of releasing chemical energy but has since also been applied to other sources of heat energy such as nuclear energy. The heat energy released by reactions of fuels is converted into mechanical energy via a heat engine, other times the heat itself is valued for warmth, cooking, or industrial processes, as well as the illumination that comes with combustion. Fuels are also used in the cells of organisms in a known as cellular respiration. Hydrocarbons and related oxygen-containing molecules are by far the most common source of fuel used by humans, fuels are contrasted with other substances or devices storing potential energy, such as those that directly release electrical energy or mechanical energy. The first known use of fuel was the combustion of wood or sticks by Homo erectus near 2,000,000 years ago, throughout most of human history fuels derived from plants or animal fat were only used by humans. Charcoal, a derivative, has been used since at least 6,000 BCE for melting metals. It was only supplanted by coke, derived from coal, as European forests started to become depleted around the 18th century, charcoal briquettes are now commonly used as a fuel for barbecue cooking. Coal was first used as a fuel around 1000 BCE in China, coal was later used to drive ships and locomotives. By the 19th century, gas extracted from coal was being used for lighting in London. In the 20th and 21st centuries, the use of coal is to generate electricity. Fossil fuels were rapidly adopted during the revolution, because they were more concentrated and flexible than traditional energy sources. They have become a part of our contemporary society, with most countries in the world burning fossil fuels in order to produce power. Currently the trend has been towards renewable fuels, such as biofuels like alcohols, chemical fuels are substances that release energy by reacting with substances around them, most notably by the process of combustion. Most of the energy released in combustion was not stored in the chemical bonds of the fuel. Chemical fuels are divided in two ways, first, by their physical properties, as a solid, liquid or gas. Secondly, on the basis of their occurrence, primary and secondary, solid fuels include wood, charcoal, peat, coal, Hexamine fuel tablets, and pellets made from wood, corn, wheat, rye and other grains. Solid-fuel rocket technology also uses solid fuel, solid fuels have been used by humanity for many years to create fire
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