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The Williamson Flat Twin was motorcycle made in Coventry, UK by William ('Billy') Williamson, who had been managing director 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 Harold as a test rider. Douglas had been developing a 964 cc 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 World War I and in 1919 the only engines available were JAP 980 cc 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.[1]

Williamson Flat Twin

Manufacturer	Williamson Motor Company
Production	1912-1920
Engine	964cc water-cooled twin
Wheelbase	60.5 inches (154 cm)

References

See also

• List of motorcycles of the 1910s
• List of motorcycles by type of engine
• List of fastest production motorcycles

Records
Preceded by Scott two speed	Fastest production motorcycle 1913–1914	Succeeded by Pope Model L

На других языках

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[de] Williamson Motor Company

Williamson Motor Company Ltd. war ein britischer Hersteller von Automobilen und Motorrädern.[1][2]

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- [en] Williamson Flat Twin

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