6 pp
The Wasp Jr. R-985 was the third engine type designed by Pratt & Whitney Aircraft, following the Wasp R-1340 and Hornet R-1690, all of which were nine-cylinder engines. Virtually a Wasp of reduced dimensions, the Wasp Jr. followed closely the details of construction throughout. The Wasp Jr., originally rated at 224 kW (300 hp), was first type certificated in January 1930. Designed for light transp
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