BSA Thunderbolt
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BSA Thunderbolt
The BSA Thunderbolt was a British motorcycle made by BSA at their factory in Armoury Road in Small Heath, Birmingham between 1962 and 1972. Fitted with a single carburettor it was capable of over . Development The BSA Thunderbolt was designed as a touring motorcycle. A traditional air cooled 650 cc twin cylinder with a single large bore Amal Monobloc carburettor, it did not suffer from the same level of vibration as earlier BSA twins and could comfortably cruise at . and reached over . in road tests. The BSA development team decided to keep costs down by re-using the well proven single sided front brake from the BSA Gold Star and the same full race camshaft as the BSA Lightning. Fitted with 12 volt electrics, a Zener diode voltage regulator and twin coil ignition, the Thunderbolt sold well in the important US import market and with the fuel tank gave a range of . From 1968 the Thunderbolt benefited from a number of minor improvements including a longer kick start ...
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Birmingham Small Arms Company
The Birmingham Small Arms Company Limited (BSA) was a major British industrial combine, a group of businesses manufacturing military and sporting firearms; bicycles; motorcycles; cars; buses and bodies; steel; iron castings; hand tool, hand, power tool, power, and machine tool, machine tools; coal cleaning and handling plants; sintered metals; and hard chrome process. After the Second World War, BSA did not manage its business well, and a government-organised rescue operation in 1973 led to a takeover of such operations as it still owned. Those few that survived this process disappeared into the ownership of other businesses. History of the BSA industrial group Machine-made guns BSA began in June 1861 in the Gun Quarter, Birmingham, England. It was formed by a group of fourteen gunsmith members of the Birmingham Small Arms Trade Association specifically to manufacture guns by machinery. They were encouraged to do this by the War Office which gave the BSA gunsmiths free access ...
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Birmingham
Birmingham ( ) is a city and metropolitan borough in the metropolitan county of West Midlands in England. It is the second-largest city in the United Kingdom with a population of 1.145 million in the city proper, 2.92 million in the West Midlands metropolitan county, and approximately 4.3 million in the wider metropolitan area. It is the largest UK metropolitan area outside of London. Birmingham is known as the second city of the United Kingdom. Located in the West Midlands region of England, approximately from London, Birmingham is considered to be the social, cultural, financial and commercial centre of the Midlands. Distinctively, Birmingham only has small rivers flowing through it, mainly the River Tame and its tributaries River Rea and River Cole – one of the closest main rivers is the Severn, approximately west of the city centre. Historically a market town in Warwickshire in the medieval period, Birmingham grew during the 18th century during the Midla ...
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Great Britain
Great Britain is an island in the North Atlantic Ocean off the northwest coast of continental Europe. With an area of , it is the largest of the British Isles, the largest European island and the ninth-largest island in the world. It is dominated by a maritime climate with narrow temperature differences between seasons. The 60% smaller island of Ireland is to the west—these islands, along with over 1,000 smaller surrounding islands and named substantial rocks, form the British Isles archipelago. Connected to mainland Europe until 9,000 years ago by a landbridge now known as Doggerland, Great Britain has been inhabited by modern humans for around 30,000 years. In 2011, it had a population of about , making it the world's third-most-populous island after Java in Indonesia and Honshu in Japan. The term "Great Britain" is often used to refer to England, Scotland and Wales, including their component adjoining islands. Great Britain and Northern Ireland now constitute the ...
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Motorcycle
A motorcycle (motorbike, bike, or trike (if three-wheeled)) is a two or three-wheeled motor vehicle steered by a handlebar. Motorcycle design varies greatly to suit a range of different purposes: long-distance travel, commuting, cruising, sport (including racing), and off-road riding. Motorcycling is riding a motorcycle and being involved in other related social activity such as joining a motorcycle club and attending motorcycle rallies. The 1885 Daimler Reitwagen made by Gottlieb Daimler and Wilhelm Maybach in Germany was the first internal combustion, petroleum-fueled motorcycle. In 1894, Hildebrand & Wolfmüller became the first series production motorcycle. Globally, motorcycles are comparably popular to cars as a method of transport. In 2021, approximately 58.6 million new motorcycles were sold around the world, fewer than the 66.7 million cars sold over the same period. In 2014, the three top motorcycle producers globally by volume were Honda (28%), Yamaha (17 ...
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Small Heath, Birmingham
Small Heath is an area in south-east Birmingham, West Midlands, England situated on and around the Coventry Road about from the city centre. History Small Heath, which has been settled and used since Roman times, sits on top of a small hill. The slightly elevated site offers poor agricultural land, lying on a glacial drift of sand, gravel, and clay, resulting in a heathland that provides adequate grazing for livestock. The land, therefore, seems to have developed as a pasture or common land, on which locals could graze their animals. However, the site lies directly on the route between Birmingham and Coventry, and so was probably used by drovers transporting animals to and from the two cities, and the livestock markets within each. The Coventry Road itself was first recorded in 1226, leading from the Digbeth crossing of the River Rea. At this time Birmingham was a medieval market town whilst Coventry was a major city of national importance. In 1745, the Coventry Turnpike was cr ...
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Amal Monobloc
AMAL was a British engineering company servicing the motorcycle and other light-engineering motor industries between 1927 and 1993Amalgamated Carburetters
Grace's Industrial Guide. Retrieved 2013-07-09
based in . AMAL is a British trademark. Amal was the supplier of carburettors to many marques within the British motorcycle industry including the largest of British manufacturers, such as
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BSA Gold Star
The BSA Gold Star is a motorcycle made by BSA from 1938 to 1963. They were 350 cc and 500 cc single-cylinder four-stroke production motorcycles known for being among the fastest bikes of the 1950s. Being hand built and with many optional performance modifications available, each motorcycle came from the factory with documented dynamometer test results, allowing the new owner to see the horsepower (bhp) produced. The Gold Star was almost continuously developed over its lifetime by BSA's engineers and riders, who improved its capabilities and increased output from its essentially simple push-rod petrol engine than had been thought possible. It was highly successful across almost all areas of motorcycle sport for well over a decade and is still regarded as a design icon of its era. Origin In 1937, Wal Handley lapped the Brooklands circuit at over on a BSA Empire Star, and was awarded one of the traditional Gold Star badges. That inspired BSA to produce the BSA Gold S ...
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BSA Lightning
The BSA Lightning is a British BSA 650 cc-class motorcycle made in Birmingham between 1965 and 1972. Development The BSA Lightning was designed as the all-round sports machine of the 1960s,''Motorcycle Sport'', June 1969, p.226 ''BSA Lightning road test''. "The catalogue describes the Lightning as a sports machine...". Accessed and added 2014-07-02 planned largely for export to the US market Motorcycle Mechanics, August 1965, p.36/37, ''Leapaway Lightning. Road test by Editor John Houslander. "Bulk of the Lightning production is said to be earmarked for the American market—and frankly we can't blame the Yanks for wanting them—they are the cream at the top of BSA's big bike production''". Accessed and added 2014-07-02 to complement the touring Thunderbolt and the later development, the supersports Spitfire. Development of the engine aimed to make it more reliable, quieter and less prone to oil leaks, with top speed sacrificed to improve mid-range and rideability. Never ...
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Zener Diode
A Zener diode is a special type of diode designed to reliably allow current to flow "backwards" (inverted polarity) when a certain set reverse voltage, known as the ''Zener voltage'', is reached. Zener diodes are manufactured with a great variety of Zener voltages and some are even variable. Some Zener diodes have a sharp, highly doped p–n junction with a low Zener voltage, in which case the reverse conduction occurs due to electron quantum tunnelling in the short space between p and n regions − this is known as the Zener effect, after Clarence Zener. Diodes with a higher Zener voltage have a more gradual junction and their mode of operation also involves avalanche breakdown. Both breakdown types are present in Zener diodes with the Zener effect predominating at lower voltages and avalanche breakdown at higher voltages. They are used to generate low-power stabilized supply rails from a higher voltage and to provide reference voltages for circuits, especially stabilized powe ...
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Amal Concentric
AMAL was a British engineering company servicing the motorcycle and other light-engineering motor industries between 1927 and 1993Amalgamated Carburetters
Grace's Industrial Guide. Retrieved 2013-07-09
based in . AMAL is a British trademark. Amal was the supplier of carburettors to many marques within the British motorcycle industry including the largest of British manufacturers, such as
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Honda CB750
The Honda CB750 is an air-cooled, transverse, in-line four-cylinder engine motorcycle made by Honda over several generations for year models 1969–2003 as well as 2007 with an upright or standard riding posture. It is often called the original Universal Japanese Motorcycle (UJM). Though other manufacturers had marketed the transverse, overhead camshaft, inline four-cylinder engine configuration and the layout had been used in racing engines prior to World War II, Honda popularized the configuration with the CB750, and the layout subsequently became the dominant sport bike engine layout. The CB750 is included in the AMA Motorcycle Hall of Fame Classic Bikes; was named in the Discovery Channel's "Greatest Motorbikes Ever"; was in ''The Art of the Motorcycle'' exhibition, and is in the UK National Motor Museum. The Society of Automotive Engineers of Japan, Inc. rates the 1969 CB750 as one of the ''240 Landmarks of Japanese Automotive Technology''. The CB750 was the first moto ...
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Triumph TR6 Trophy
The TR6 Trophy is a motorcycle that was made by Triumph, in Meriden, from 1956 to 1973, when it was replaced by the five-speed 750-cc Triumph Tiger TR7V. During this time, it was a successful model, particularly in the US. The competition variant, popularly known as the "desert sled", won numerous competitions throughout the late 1950s and 1960s. Steve McQueen's fondness for the model is well known, as is his participation in the 1964 ISDT on a TR6 Trophy. Background The genesis of the model came with the introduction of the 650-cc Thunderbird Model in 1950. This was released to meet the demand for higher-capacity motorcycles, particularly from the United States, Triumph's largest export market. In 1954, the T110 model was introduced, a higher performance version of the Thunderbird. The success of these models and the 500-cc TR5 Trophy led to the creation of a 650-cc TR6 Trophy model. The TR6 was developed and produced specifically for the US market, in particular, Califor ...
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