Renault 80 hp

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80 hp/Type WS
Renault 80.jpg
Renault 80 hp at the Canada Aviation Museum
Type Air-cooled V-8 piston engine
National origin France
Manufacturer Renault
First run 1914
Major applications Airco DH.6
Number built 2,216[1]
Developed from Renault 70 hp

The Renault 80 hp, or Type WS in British service, was a V-8 aero engine that first ran in 1914. The engine was manufactured in Britain by Renault Limited of West Brompton, London between August 1914 and December 1918, seven other companies, including Rolls-Royce and Brazil Straker,[2] also produced the engine.[3] The Renault V-8 engines were noted as inefficient but reliable, the inefficiency being mainly due to the excessively rich fuel/air mixture used to assist cooling.[4]


Engines on display[edit]

A preserved Renault 80 hp is on display at the Canada Aviation Museum. Another one on display at the Museo Nacional de Aeronautica in Morón -Buenos Aires-Argentina

Specifications (80 hp)[edit]

Data from Lumsden [3]

General characteristics

  • Type: Inline air-cooled, upright, 90-degree, V-8 piston engine
  • Bore: 4.13 in (105 mm)
  • Stroke: 5.12 in (130 mm)
  • Displacement: 548.9 cu in (9 L)
  • Length: 50.6 in (1,285 mm)
  • Width: 35.5 in (902 mm)
  • Height: 35.3 in (897 mm)
  • Dry weight: 463 lb (210 kg)


  • Valvetrain: Single overhead exhaust valve, single side inlet valve per cylinder.Although this valve arrangement is cited as "one side and one overhead valve" it should be noted that both valves are situated in a lateral pocket from/to which gases flow. Therefore both valves are "side valves" one on top of this lateral pocket and one on its bottom. There are no valves on the combustion chamber or on the overhead position.
  • Fuel system: Single 32 mm Claudel-Hobson carburettor
  • Fuel type: 40–50 octane petrol
  • Cooling system: Air-cooled
  • Reduction gear: 0.5:1, left hand tractor.(There is no proper "reduction gear". The reduction in this case is achieved due to the fact that the Airscrew is mounted on the Cam Shaft, therefore the shaft rotation speed, and so the airscrew, is half of the crank speed)


See also[edit]

Related development
Related lists



  1. ^ British production
  2. ^ Gunston, Bill (1998). Fedden. Rolls-Royce Heritage Trust. pp. 35–37. ISBN 1-872922-13-9. Historical Series No26. 
  3. ^ a b Lumsden 2003, p. 181
  4. ^ Gunston 1989, p. 135.


  • 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.