Factory workers assemble the cylinders on an early production Pratt and Whitney R-2800 Double Wasp radial aircraft engine in June 1942. (U.S. National Archives and Records Admin. Photograph.)
(U.S. National Archives and Records Admin. Photograph.)

Pratt & Whitney R-2800 Double Wasp

Factory workers assemble the cylinders on an early production Pratt & Whitney R-2800 Double Wasp radial aircraft engine in June 1942. (U.S. National Archives and Records Admin. Photograph.)

Factory workers assemble the cylinders on an early production Pratt and Whitney R-2800 Double Wasp radial aircraft engine in June 1942. (U.S. National Archives and Records Admin. Photograph.)
(U.S. National Archives and Records Admin. Photograph.)

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