Pratt & Whitney R-2800-31 Double Wasp
Ford Motor Co., Dearborn, Michigan, U.S.A. 1943
  Pratt & Whitney R-2800-31 Double Wasp


The engine R-2800 Double Wasp was for the American engine company Pratt & Whitney the top expression of the classical arrangement of 18 star cylinders on two ranks. Designed by A. V. D. Willgoos and prototype like manufactured in 1941, the R-2800 was directly derived from previous models R-1830 Twin Wasp and R-2180 Twin Hornet with 14 cylinders. Produced in more than 70 thousand units and in different versions, the engine was assembled during the war on many types of planes, i.e. Douglas A26, Martin AT23, Vega B 34A, Curtiss C46, Lockheed PV-1 and PV-2. During the war time, the engine was licence manufactured also by other American companies, such as Ford. Even in post-war time, the use of these engines mainly involved business aircrafts, such as Douglas DC 6A, DC 6B, Fairchild C123.