The Pratt & Whitney Wasp was the civilian name of a family of air-cooled radial piston engines developed in the 1930s, 1940s, and 1950s. The Pratt & Whitney Aircraft Company (P&W) was founded in 1925 by Frederick B. Rentschler, who had previously been the President of Wright Aeronautical. He brought with him some of Wright's best designers and the new team quickly came up with their first design, the R-1340 Wasp. Wasp series Pratt & Whitney R-1340 Wasp Pratt & Whitney R-985 Wasp Junior Pratt & Whitney R-1830 Twin Wasp Pratt & Whitney R-1535 Twin Wasp Junior Pratt & Whitney R-2000 Twin Wasp Pratt & Whitney R-2180-E Twin Wasp E Pratt & Whitney R-2800 Double Wasp Pratt & Whitney R-4360 Wasp Major Note: the designations refer to the engine configurations as follows: "R" = Radial, followed by the approximate displacement in cubic inches. See also References Notes Bibliography External links Pratt & Whitney - Classic engines Aircraft air-cooled radial piston engines 1930s aircraft piston engines Wasp series