Pratt & Whittney R-985 Wasp Junior

The first R-985 produced 300 hp and flew in 1930. By the end of World
War II, improved R-985s produced 450 hp and were used in thousands of
military and civilian aircraft.

The R-985 was in production from 1930 through 1953. Over 39,000 were
produced.



9-cylinder, air-cooled radial
displacement: 985 cubic inches (16.1 liters)
Bore x stroke: 5 3/16 x 5 3/16 in