Scott model 3S
The Scott Model 3S from 1934 was a motorcycle made by the English manufacturer Scott Motor Cycle Company , which was the first to use a three-cylinder two-stroke engine.
The motorcycle was presented to the press in 1934, but only a few copies were delivered in 1936. Nine motorcycles have been built from this model; five copies are said to still exist today, one of which is ready to drive.
The water-cooled three-cylinder two-stroke engine with nose piston and separate lubrication, designed by Bill Cull, was innovative and new . Since each cylinder had a separate crankcase, three oil pumps supplied the engine with lubricant to the bearings and cylinder walls. An engine sold to Auto Union is said to have contributed to the development of the local three-cylinder two-stroke engine.
The chassis consisted of a conventional double tube frame, which, according to the state of the art, was unsprung at the rear and sprung at the front by a Webb trapeze fork .
Technical specifications
| Engine type | Three-cylinder two-stroke engine | |
| Displacement | 986 cc | |
| Bore × stroke | 73 × 78 mm | |
| compression | 5.8: 1 | |
| power | 35.3 kW (48 hp) at 5200 min -1 | |
| Carburetor | 1 amal, 28 mm | |
| ignition | Battery coil ignition | |
| transmission | 4 gears (foot switch), chain drive | |
| frame | Double loop tubular frame | |
| wheelbase | 1420 mm | |
| Front and rear tires | 3.25–19 (in the back also 3.50–19) | |
| Brakes front and rear | Drum Ø 178 mm (front), Ø 255 mm (rear) | |
| Empty weight | approx. 222 kg | |
| Tank capacity | 11 l | |
| Top speed | 153 km / h | |
| price | 115 pounds sterling | |