Bristol Draco

The Bristol Draco is one of the air-cooled 9-cylinder radial engines of the British manufacturer Bristol Aeroplane Company. For experimental purposes, he was equipped in 1930 with a fuel injection. For better performance at high altitudes was provided by a loader.

History

The basis for the development of Draco the Bristol Pegasus IM.3. The carburetor had only a simple throttle while two -line injection pumps supplied four or five cylinders with fuel. The injection was made into the intake before each fork in the intake manifold to the two intake valves of each cylinder. Built and tested in flight tests, the engine was in a Westland Wapiti. Since the effort for the injection did not yield any significant improvements, the experiments were terminated. Both the engine and these attempts were largely unknown, but had an impact on the further development of engines in the UK.

Specifications

  • Bore: 146 mm
  • Stroke: 190.5 mm
  • Displacement: 28.7 l
  • Compression ratio: 5.3:1
  • Propellers reduction: 0.5:1
  • Diameter: 1410 mm
  • Length: 1105 mm
  • Continuous power: 540 hp

Swell

  • "British Piston Aero Engines and Their Aircraft ," Alec Lumsden, ISBN 1853102946
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