graduate

R-985 Aircraft Engine


Photograph of R-985 aircraft engine

National Museum of the U.S. Air Force

The Pratt & Whitney R-985 Wasp Junior was an air-cooled supercharged radial aircraft engine with nine cylinders. It was an economy version of the SR-1340 Wasp with bore and stroke reduced to 5.1875 inches (132mm), for a total displacement of 985 cubic inches (16.14 liters) and a rating of 450 hp (336 kW). Maximum RPMs were 2300 and the engine cost about $6000.

The R-985 was used on the OS2U Kingfisher and on most U.S. trainer aircraft, including the AT-7 Navigator, AT-11 Kansan, and BT-13.

References

Gunston (2006)
National Museum of the U.S. Air Force (2011-2-4; accessed 2012-5-21)


Valid HTML 4.01 Transitional