The Pratt & Whitney R-1340 Wasp was an aircraft engine of the reciprocating type that was widely used in American aircraft from 1920 onwards.  It was the Pratt & Whitney Aircraft Company’s first engine and the first of the famed Wasp series of engines and featured a single-row, nine-cylinder, air-cooled engine of radial design.

The R-1340-AN1 engine variant was used to power the North American Harvard used by the South African Air Force and consisted of a 550hp (410kW), 600hp (447kW) that displaced 1,344 cubic inches (22L).  The bore and stroke were both 5.75in (146mm).  A total of 34,966 of these engines were manufactured.