Pratt & Whitney Wasp series

The Pratt & Whitney Wasp was the civilian name of a family of air-cooled, radial piston engines developed in the 1920s, 1930s, and 1940s.

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. The name "Wasp" was suggested for the first model by Rentschler's wife, Faye.

Wasp series R-985 Wasp Junior (1930) Nine-cylinder, single-row, air-cooled radial Bore x stroke: Displacement:

R-1340 Wasp (1925) Nine-cylinder, single-row, air-cooled radial Bore x stroke: Displacement:

R-1535 Twin Wasp Junior (1931) 14-cylinder, two-row, air-cooled radial Bore x stroke: Displacement: Power output:

R-1830 Twin Wasp (1931) 14-cylinder, two-row, air-cooled radial Bore x stroke: Displacement: Power output:

R-2000 Twin Wasp 14-cylinder, two-row, air-cooled radial Bore x stroke: Displacement: Power output:

R-2180-E Twin Wasp E 14-cylinder, two-row, air-cooled radial Bore x stroke: Displacement: Power output:

R-2800 Double Wasp (1940) 18-cylinder, two-row, air-cooled radial Bore x stroke: Displacement: Power output: ( with ADI)

R-4360 Wasp Major (1942) 28-cylinder, four-row, air-cooled radial Bore x stroke: Displacement:

Note: the designations refer to the engine configurations as follows: "R" = Radial, followed by the approximate displacement in cubic inches.

Pratt & Whitney Wasp series

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