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stanchions. Although the frame and suspension were innovative, the engine was essentially a generator, designed to run for long periods at a steady speed and it did not cope well with the varying engine speeds of motorcycling. There was also a tendency to sideways shaking at low engine speeds which was a feature of the horizontally opposed engine. Douglas hired former
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164:. By the end of the war in 1945, Douglas restarted motorcycle production – much to the surprise of the industry, as it was generally expected that the war had led to other interests, with the company being taken over by Aero Engines Ltd, so there were not many engineering staff left for the development of new motorcycles. The
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In 1948, the company developed a series of motorcycles based on the T35. Designed by George
Halliday, these featured Douglas "Radialraulic" forks with the front wheel spindle carried on short leading links pivoted at the rear of the fork stanchions – with springs and a damping mechanism inside the
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Competition version with high-level exhausts and a less deeply valanced front mudguard. There never was a
Douglas Mark II, and the Mark IV was short-lived, so the end of the line of development was the Mark V produced between 1951 and 1954, when it was replaced by the
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of the flat twin was useful for trials control but it did have a clearance problem over the rough ground. Occasionally one of the carburettors would be knocked off, but the team developed a "quick change" replacement and always kept spares ready.
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engine in the
Douglas Mark III was based on a Second World War electricity generator. As well as the 1948-9 Douglas Mark III, Douglas also produced a Mark III "De Luxe", a Mark III Sports, and a rigid-framed
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used the same flat-twin 350 cc as the generator, mounted in a duplex fame with torsion bar rear suspension. The T35 was an unexpected export success; 1947 factory records show them being exported to
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rider David Tye worked for
Douglas as a sales rep, competing at weekends in the factory trials team. In 1950, he won the Nevis Trophy and the Special First Class Award in the demanding
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Works rider Don
Chapman on the Douglas Mark III Sports gave Douglas their only major successes in motorcycle racing by winning at the
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magazine prize for "most meritorious" performance in the
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in 1950. Securing a win by 19 seconds, Chapman was awarded the
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as their specialist engine tuner and Walter Moore (who designed the
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riding the
Douglas Mark III Competition model. The low
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148:engines using their 348 cc overhead valve
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336:"A classic: The 1947 Douglas T35 Motorcycle"
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156:'s wartime summit meeting held next to the
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443:Douglas Mark III in Motor Cycle magazine
305:Great British Motorcycles of the Fifties
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123:between 1948 and 1949. The 350 cc
53:MkIII 1948–1949, Mk IV 1950, Mk V 1951
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235:Douglas Mark III Competition version
463:Motorcycles introduced in the 1940s
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88:Four-speed with chain final drive
279:List of motorcycles of the 1940s
140:During the Second World War the
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307:. Hamlyn Publishing Group Ltd.
96:300 pounds (140 kg) (
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361:Classic British Motorcycles
274:List of Douglas motorcycles
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40:Douglas Motorcycle Company
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418:. Patrick Stephens Ltd.
244:Scottish Six Days Trial
206:as Technical Director,
410:Reynolds, Jim (1990).
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115:designed and built by
414:Best of British Bikes
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132:Competition version.
363:. Chancellor Press.
359:Currie, Bob (1993).
303:Currie, Bob (1980).
73:horizontally opposed
458:Douglas motorcycles
256:Silverstone Circuit
227:Competition success
200:Sunbeam motorcycles
117:Douglas motorcycles
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18:Type of motorcycle
425:978-1-85260-033-4
370:978-1-85152-250-7
314:978-0-86363-010-1
240:Motorcycle trials
221:Douglas Dragonfly
216:motorcycle trials
154:Winston Churchill
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388:. Retrieved
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339:. Retrieved
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204:Erling Poppe
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84:Transmission
36:Manufacturer
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193:Development
175:Switzerland
166:Douglas T35
77:four stroke
61:Douglas T35
58:Predecessor
452:Categories
285:References
212:Norton CS1
113:motorcycle
50:Production
202:designer
150:flat twin
146:generator
125:flat twin
268:See also
183:Santiago
179:Belgium
142:Bristol
136:History
121:Bristol
71:348 cc
44:Bristol
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390:10 May
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341:10 May
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187:Russia
185:, and
171:Canada
158:Sphinx
93:Weight
67:Engine
420:ISBN
392:2009
365:ISBN
343:2009
309:ISBN
162:Giza
107:The
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