How many R2800 engines were built?
By the time production ended in 1960, more than 125,000 r-2800s had been manufactured by pratt & whitney and its licensees, one of the largest production runs of any single aircraft engine model. R-4360 wasp major engine. The pratt & whitney r-4360 wasp major is an american 28-cylinder four-row radial piston aircraft engine designed and built during world war 2. First run in 1944, it is the largest-displacement aviation piston engine to be mass-produced in the united states, and at 4,300 hp, the most powerful.Pratt & Whitney initiated design and development of the R-2800 Double Wasp in 1936, and first displayed it in 1939 at the New York World’s Fair. With water injection and turbo-supercharging, the R-2800 produced more than one-horsepower per 16.A Pratt & Whitney R-1830 Twin Wasp 14-cylinder radial engine, the most produced aircraft engine in history. Displacing 30 litres (1,830 cu in) and producing 1,200 hp, it was used in a number of notable aircraft, including the PBY Catalina and C-47. It also powered the B-24 Liberator heavy bomber.