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Continental built this engine under license from Wright. It is a member of the Wright J-6 Whirlwind family, which was sometimes referred to as the J-6-9. The well known designers Sam Heron, and Charles Lawrance were involved during the mid-1920s with the original version of the J-6, which produced up to 336 kW (450 hp).

During World War II, the further developed Continental engine was installed in medium tanks. Post-World War II R-975 engines powered helicopters such as the Kaman HOK, Kellet H-10, Piasecki HUP, and Piasecki XHRP as well as the McDonnell XV-1 convertiplane.

 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
Date Circa World War II Country of Origin United States of America Type PROPULSION-Reciprocating & Rotary Manufacturer Continental, Inc.
 Designer Wright Aeronautical
 Physical Description Type: Radial, 9 cylinders, air-cooled Power rating: 410 kW (550 hp) at 2,400 rpm Displacement: 16 L (975 cu in) Bore and Stroke: 127 mm (5 in.) x 140 mm (5.5 in.) Weight: 331.1 kg (730 lb) Dimensions Overall: 730lb. (331.1kg)
Other: 42 3/8 x 45 1/2in. (107.7 x 115.6cm)
Diameter 115.6 cm (45.5 in.), Length 107.7 cm (42.4 in.) (Dimensions for R-975-42)
 Inventory Number A19771196000 Credit Line Transferred from the Naval Aviation Museum Data Source National Air and Space Museum Restrictions & Rights Usage conditions apply
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