Green C.4

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Preserved Green C.4.
Type Piston aero engine
Manufacturer Green Engine Co Ltd
Designed by Gustavus Green
First run c.1908
Major applications Avro Type D

The Green C.4 was a British four-cylinder, water-cooled aero engine that first ran in 1908, it was designed by Gustavus Green and built by the Green Engine Co and Aster Engineering. The engine was one of two Green designs to win a government prize.[1]


Engines on display[edit]

A preserved Green C.4 engine is on public display at the Royal Air Force Museum London.

Specifications (C.4)[edit]

Data from Lumsden.[2]

General characteristics

  • Type: 4-cylinder, inline, upright piston engine
  • Bore: 4.13 in (105 mm)
  • Stroke: 4.73 in (120 mm)
  • Displacement: 253.44 cu in (4.158 L)
  • Length: 39 in (991 mm)
  • Width: 16 in (406 mm)
  • Height: 28 in (711 mm)
  • Dry weight: 184 lb (83 kg)



  • Power output: 30–35 hp (22–26 kW) nominal, 52 hp (39 kW) at 1,460 rpm (maximum power)
  • Specific power: 0.2 hp/cu in (9.37 kw/L)
  • Power-to-weight ratio: 0.28 hp/lb (0.46 kW/kg)

See also[edit]

Related lists



  1. ^ Gunston 1989, p. 74.
  2. ^ Lumsden 2003, p. 155.


  • Gunston, Bill. World Encyclopaedia of Aero Engines. Cambridge, England. Patrick Stephens Limited, 1989. ISBN 1-85260-163-9
  • Lumsden, Alec. British Piston Engines and their Aircraft. Marlborough, Wiltshire: Airlife Publishing, 2003. ISBN 1-85310-294-6.

External links[edit]