Grace's Guide To British Industrial History

Registered UK Charity (No. 115342)

Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 147,919 pages of information and 233,587 images on early companies, their products and the people who designed and built them.

Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 147,919 pages of information and 233,587 images on early companies, their products and the people who designed and built them.

Bristol Engine Co: Draco

From Graces Guide

Note: This is a sub-section of Bristol Engine Co.

The Bristol Draco was an air-cooled 9-cylinder radial engine from the Bristol Engine Co. It was essentially a version of the Jupiter converted to use a fuel injection system.

The carburettor had only a simple butterfly valve, while two injection pumps supplied the cylinders with fuel: one handling four and one five cylinders. Injection was into the manifold before they split into the two intake valves for each cylinder. The engine was flight tested in a Westland Wapiti. Since the expenditure did not bring considerable improvements the development was stopped.

Specifications

  • Bore: 5.75 in (146 mm)
  • Stroke: 7.5 in (190.5 mm)
  • Capacity: 1,750 in³ (28.7 L)
  • Compression: 5.3:1
  • Propeller reduction: 0.5:1
  • Diameter: 1,410 mm
  • Length: 1,105 mm
  • Continuous duty: 540 hp

See Also

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Sources of Information