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Pratt & Whitney R-2000 Twin Wasp




The R-2000 was an enlarged version of the radial Pratt & Whitney R-1830 Twin Wasp developed in 1942, with focus on reducing the manufacturing costs and fuel requirements. The bore was increased to 5.75 inch, while it still retained the 5.5 inch stroke. This brought displacement up to 2,000 There were a number of detail changes from the R-1830, such as front-mounted instead of rear-mounted magnetos, plain bearings for the crankshaft rather than roller bearings, and 87 octane fuel (specified because there were fears wartime supplies of 100 octane might fall short, but those fears were groundless). The R-2000 produced 1,300 hp @ 2,700 rpm with 87 octane, 1,350 hp with 100 octane and 1,450 hp @ 2,800 rpm with 100/130-grade fuel.


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Type: Twin-row radial engine, 14 cylinder
Bore: 5.75 in (146 mm)
Stroke: 5.5 in (139.7 mm)
Displacement: 2,004 cu in (32.8 lt)
Length: 61.02 in (1550 mm)
Diameter: 49.49 in (1257 mm)
Dry weight: 1570 lb (714 kg)
Fuel system: Stromberg carburetor
Fuel type: 100/130 grade gasoline
Cooling system: Air-cooled
Reduction gear: 2:1
Power output: 1,350 hp at 2,700 rpm (sea level)
Compression ratio: 6.5:1






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