Pratt & Whitney R-2000 Twin Wasp

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, while it still retained the 5.5 in stroke. This brought displacement up to 2000 in3. 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 1300 hp at 2,700 rpm with 87 octane fuel, 1350 hp with 100 octane fuel and 1450 hp 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)

and start a new, fully-formatted line with -- |1450 hp at 2,700 rpm at 1000 ft (low-altitude military rating) |1100 hp at 2,700 rpm at 16000 ft (high-altitude military rating) |1100 hp at 2,550 rpm at 7500 ft (low-altitude normal rating) |1000 hp at 2,550 rpm at 17000 ft (high-altitude normal rating) |735 hp at 2,230 rpm at 14700 ft (cruise rating) |700 hp at 2,150 rpm at 2150 ft (cruise rating)}} |power/weight=

References

Notes

Bibliography

• Gunston, Bill. World Encyclopedia of Aero Engines: From the Pioneers to the Present Day. 5th edition, Stroud, UK: Sutton, 2006.
• White, Graham. Allied Aircraft Piston Engines of World War II: History and Development of Frontline Aircraft Piston Engines Produced by Great Britain and the United States During World War II. Warrendale, Pennsylvania: SAE International, 1995.
• Wilkinson, Paul H. Aircraft Engines of the World 1945. 3rd edition, New York: Paul H. Wilkinson, 1945.

References

1. White (1995), p. 221.
2. Wilkinson (1945), p. 137.