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Pratt & Whitney R-2000

The Pratt & Whitney R-2000 Twin Wasp is a radial engine developed in the United States in 1942 to power military aircraft. It is one of the Pratt & Whitney Wasp series of radial engines.

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 inch, while it still retained the 5.5 inch stroke. This brought displacement up to 2,000 inĀ³. 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.

Specifications: (R-2000-3)

Type: two-row, 14-cylinder, air-cooled radial
Manufacturer: Pratt & Whitney
First run: 1942
Number built: N/A

General characteristics
  Type: Fourteen-cylinder two-row
    supercharged air-cooled radial engine
  Bore: 5.75 in (146 mm)
  Stroke: 5.5 in (139.7 mm)

  Displacement: 2,004 cu in (32.8 L)
  Length: 1550 mm
  Diameter: 1257 mm

Components
  Fuel system: Stromberg carburETOr
  Fuel type: 100/130 grade gasoline
  Cooling system: Air-cooled
  Reduction gear: 2:1

Performance
  Power output: 1,350 hp at 2,700 rpm (sea level)
  Compression ratio: 6.5:1

[Source - Wikipedia]


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