Williamson Flat Twin

Williamson Flat Twin

Infobox Motorcycle
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name=Williamson Flat Twin


aka=
manufacturer=flagicon|UK Williamson Motor Company
production=1912-1920
class=
related=
wheelbase= convert|60.5|in|cm
length=
width=
height=
seat height=
engine=964cc water cooled twin
power=
torque=
dry weight= convert|300|lbs|kg
fuel_capacity=
fuel_economy=
transmission=

The Williamson Flat Twin was the a British motorcycle made in Coventry by Willaim ('Billy') Williamson, who had been MD of the Coventry-based Rex company. He teamed up with William Douglas (of Douglas Motorcycles to develop new prototype motorcycles under the name Williamson-Douglas and employed Billy's brother Howard as a test rider. Douglas had been developing a 964cm³ water-cooled flat twin engine that could be used either for light cars or motorcycles. Billy Williamson fitted this engine into a frame with Douglas-Druid girder forks and a Douglas two-speed gearbox and a foot-operated clutch which was launched in 1912 at a cost of £82. In 1913 an air-cooled version was added to the range and in 1914 a kick starter was added. Production was halted by the first world war and in 1919 the only engines availabe were JAP 980 cm³ air-cooled side valves, so Williamson redesigned the frame to fit. Unfortunately Billy Williamson suffered a fatal heart attack in 1920 after only twenty motorcycles had been produced. [cite book|last=Currie|first=Bob|title=Classic British Motorcycles of over 500cc|publisher=Patrick Stephens Ltd|date=1988|isbn=1-85260-083-7]

ee also

* Douglas (motorcycles)
* Rex-Acme
* National Motorcycle Museum

References

External links


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