The Pratt & Whitney R-2800 Double Wasp is a legendary 18-cylinder, double-row, air-cooled radial engine. Introduced in 1939, it was renowned for its immense power—exceeding 2,000 hp—and rugged reliability during World War II. This engineering masterpiece powered iconic aircraft such as the F4U Corsair, P-47 Thunderbolt, and F6F Hellcat, making it one of the premier piston engines in aviation history.