The Pacific War Online Encyclopedia
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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)The Pacific War Online Encyclopedia © 2009, 2012 by Kent G. Budge. Index
