The Pratt & Whitney R-2000 Twin Wasp is an American radial engine developed in 1942 to power military aircraft. It is one of the Pratt & Whitney Wasp series of radial engines.
Contents
Design and development
The R-2000 was an enlarged version of the Pratt & Whitney R-1830 Twin Wasp, with focus on reducing the manufacturing costs and fuel requirements. The bore was increased to 5.75 in (146 mm), while it still retained the 5.5 in (140 mm) stroke. This brought displacement up to 2,000 in3 (32.8 L). There were a number of detail changes from the R-1830, such as front-mounted instead of rear-mounted magnetos (as with the larger, and earlier Double Wasp), 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 (970 kW) at 2,700 rpm with 87 octane fuel, 1,350 hp (1,010 kW) with 100 octane fuel and 1,450 hp (1,080 kW) at 2,800 rpm with 100/130-grade fuel.
Applications
Aviation Traders Carvair
Douglas C-54 Skymaster
Douglas DC-4
Douglas Hyper DC-3
de Havilland Canada DHC-4 Caribou
Vought XF5U
Specifications (R-2000 2SD1-G)
Data from Aircraft Engines of the World
General characteristics
Type: Twin-row radial engine, 14-cylinder
Bore: 5.75 in (146.05 mm)
Stroke: 5.5 in (139.7 mm)
Displacement: 2,004 in3 (32.84 L)
Length: 60.7 in (1,540 mm)
Diameter: 49.5 in (1,260 mm)
Dry weight: 1,590 lb (720 kg)
Components
Supercharger: 2-speed
Fuel system: Stromberg carburetor
Fuel type: 100/130 grade gasoline
Cooling system: Air-cooled
Reduction gear: 2:1
Performance
Power output:
Compression ratio: 6.5:1