Scott model 3 3/4

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Scott 3 3/4 (1913)

The Scott Model 3 3/4 from 1911 was a racing motorcycle from the English Scott Motor Cycle Company , which was the first to have a two-cylinder two - stroke engine. With this innovative motorcycle model, drivers Frank Applebee and Tim Wood won the senior class races of the Isle of Man TT on the Snaefell Mountain Course in 1912 and 1913 . These were the first racing successes of a two-stroke engine in motorcycle racing.

history

In 1908 Alfred Angas Scott developed a parallel twin two-stroke engine with a displacement of 333 cc. The first model had air-cooled cylinders, but a water-cooled cylinder head and a crankshaft with two bearings. The two-stroke engine was separately lubricated by oil pumps . For the first time, the power was transmitted to the rear wheel via a two-speed gearbox with foot shift and chain drive; was started with the Kickstarter invented by Scott .

In 1911 Scott developed a completely water-cooled engine with rotary valve control , which in 1912 had a displacement of 532 cm³; the commercial street version had an output of 12  hp at 3000 rpm. The radiator in front of the inclined engine was designed according to the thermosiphon cooling system, the gasoline tank was relocated around the seat tube. The frame consisted of a composite of straight tubes - an inspiration Scott had got from the Hildebrand and Wolfmüller motorcycle ; this frame was used unchanged in the Scott Super Squirrel and Scott Flying Squirrel models until the 1930s . The Scott front fork is considered a forerunner of the telescopic fork .

The tank and cylinders of the essentially black motorcycle were painted in a striking purple , the favorite color of Scott's sister Alice. The Scott Motor Cycle Company kept this unusual color combination after the death of the company founder.

Individual evidence

  1. ^ Hugo Wilson: The Lexicon from the motorcycle. Motorbuch Verlag, Stuttgart 2001, ISBN 3-613-01719-9 , p. 166.
  2. ^ Frank Applebee, 1912
  3. ↑ a b c Helmut Krackowizer: Milestones in motorcycle history. 1st edition. Motorbuch Verlag, 1987, ISBN 3-613-01141-7 , p. 21.
  4. ↑ a b Motorcycle Revue. Edition 1984/85, p. 60.
  5. ^ A b Roger Hicks: The international encyclopedia motorcycles. 1st edition. Motorbuch Verlag, Stuttgart 2006, ISBN 3-613-02660-0 , p. 442.
  6. ^ LJK Setright: The Guinness Book of Motorcycling. Facts and Feats. 1982, ISBN 0-85112-255-8 , p. 28.
  7. ↑ Thomas Trapp: Motorcycle Oldtimer Catalog . Heel Verlag, 2003, ISBN 3-89880-099-7 , p. 141
  8. ↑ a b Alan Cathcart in Motorrad Classic. 5/2013, pp. 73-78.