Titan Missile Museum
 

Pratt & Whitney R-985 Wasp Junior

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Engine entered civilian and military service in 1932 rated at 300 horsepower final version rated at 450 horsepower after WW-II. Photo above shows engine as installed on UC-45J.

All photographs and text copyright Arizona Aerospace Foundation, 2009 and may not be used in any way without express written permission.

Technical Specifications
Cylinders 9
Displacement/ Compressions 985 cu in
Rated Output 450 hp at 2,300 r.p.m.
Dry Weight 560 lbs.
Commonly Used On AT-7, AT-11, BT-13, OS2U-1, UC-43, UC-45, JRB-, SNB-, HUP-2, H-5, HO3S-1, Model 10A & many civilian aircraft.