Renault 80 hp

Updated on Dec 15, 2023

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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, also produced the engine. 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.

Applications

Airco DH.6

Alliance P.1

Avro 548

Caudron G.3

Farman Shorthorn

Vickers F.B.7A

Engines on display

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)

Data from Lumsden

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)

Components

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)