Ascot-Pullin 500

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Ascot-Pullin 500
Ascot Pullin 1929 500cc 1 cyl ohv right.jpg
Right side of a 1929 Ascot-Pullin 500
Manufacturer Ascot-Pullin Motorcycles
Production1928–1930 [1]
PredecessorPullin-Groom
Engine 496  cc (30.3 cu in) air-cooled OHV single
Top speed70 mph (110 km/h) [2]
Power 17  bhp (13 kW) [2]
Transmission Three speed chain final drive
Suspension Pressed steel girder front, rigid rear
Brakes Drum front and rear
Weight330 lb (150 kg)[ citation needed ] (dry)

The Ascot-Pullin 500 was a motorcycle made by Ascot-Pullin Motorcycles in Letchworth, Hertfordshire in 1928. [1] As an updated version of the Pullin motor bicycle of 1919, [3] the Ascot-Pullin 500 overhead valve single was the first time hydraulic brakes were used on a motorcycle. [4]

Contents

History

In 1919, British inventor Cyril Pullin and Stanley L. Groom produced the Pullin motor bicycle, [3] a wheeled machine that included a novel two-stroke engine and extensive manufacture use of steel pressings that anticipated developments by British motorcycle manufacturer Ariel Motorcycles in the late 1950s and Japanese motorcycle manufacturers in 1960s. [3] The bicycle was patented in 1920. [3] Since 1920, Pullin had been working with Stanley Groom to develop and patent a two-stroke motorcycle with a unique design of pressed sheet metal frame and forks. After working on a range of other inventions including the Ascot, Pullin teamed up with Groom again to further develop their ideas and patent the Ascot Pullin motorcycle, with a four-stroke rather than two-cycle engine. [5] At a time when manufacturers were taking a very traditional approach to motorcycle design with conventional frames and engine layout, Pullin and Grom were keen to create an enclosed feel by mounting the engine horizontally within a pressed-steel frame. As well as the hydraulic brakes, Pullin also designed a telescopic centre stand and an adjustable windshield, complete with a windscreen wiper and rear-view mirror, as well as a fully enclosed chain and interchangeable wheels. [2]

With estimated 17  bhp (13 kW), the Ascot-Pullin was capable of 70 mph (110 km/h), but approximately 400 to 500 were produced, so few survive to this day. [1] [2]

Pullin's influence can be seen in the emergence of the Ariel Leader and the Vincent Black Prince thirty years later, which both developed the enclosed concept in an attempt to attract a wider range of customers. As with the Ascot-Pullin, however, the fully enclosed look has never really led to high volume sales but instead attracts a niche market.

At present, the U.S. National Highway Traffic Safety Administration recognizes that the first hydraulic brakes on motorcycles occurred in 1952. [6]

See also

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References

  1. 1 2 3 "Ascot Motor and Manufacturing Co". GracesGuide.co.uk. Grace's Guide Ltd. Archived from the original on 28 March 2019. Retrieved 28 March 2019.
  2. 1 2 3 4 Brown, Roland (1 September 1999). The History of British Bikes (hardback). Bath, United Kingdom: Parragon Plus. ISBN   978-0-752-53153-3. OCLC   42578944. OL   10821108M.
  3. 1 2 3 4 "Pullin motor bicycle, 1919". Science and Society Picture Library . Science Museum. 2004. Retrieved 6 December 2008.
  4. Chadwick, Ian. "Ascot-Pullin". Archived from the original on 11 December 2008. Retrieved 1 December 2008.
  5. Kephart, Douglas. "Researching the Douglas Patents" . Retrieved 3 December 2008.
  6. U.S. National Highway Traffic Safety Administration (2000). National Agenda for Motorcycle Safety. Washington, D.C.: United States Department of Transportation. p. 1983. Retrieved 6 December 2008.