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Renault 80 hp

The first versions of this engine were built in 1908, and the engine set an 8-hour endurance record in 1910. The engine continued to be used through World War I, especially in British training planes. A unique feature of the engine was that the propeller was driven at one-half engine speed by being driven off of the camshaft rather than the crankshaft in the conventional manner.

The engine illustrates another way of satisfactorily cooling air-cooled engines. On tractor planes a cowl was fitted to the engine to funnel the prop wash through the cylinders. On pusher planes, a fan was mounted opposite the propeller end to force air through a casing which partially surrounded the cylinders. This method of cooling the cylinders was augmented with fuel cooling i.e., an over-rich fuel mixture which meant that its fuel consumption was very high.

The 80 hp Renault engine powered French aircraft including Farman, Voisin, and BE 2, and British aircraft including Airco D.H.6, Alliance P.1, Avro 548, Caudron G. III, Maurice Farman Serie VII Longhorn and Serie 11 Shorthorn, Royal Aircraft Factory S.E.5a, and Vickers F.B.7A.

 Display Status

This object is not on display at the National Air and Space Museum. It is either on loan or in storage.
Object Details
Country of Origin France Type PROPULSION-Components (Engine Parts) Physical Description Metal clip like object - metal bolt with a rectanglular piece of metal folded around it. Another piece of metal wrapped within the rectangle. Red plastic plug. Dimensions Other (Clip?): 3/8 x 1 1/2 x 1 1/8 in. (1 x 3.8 x 2.9cm)
3-D (Cap): 1.9 x 2.5cm (3/4 x 1 in.)
 Materials Aluminum, Steel, Brass, plastic
 Inventory Number A19710884001 Credit Line Transferred from the U.S. Navy Data Source National Air and Space Museum Restrictions & Rights Usage conditions apply
For more information, visit the Smithsonians Terms of Use.