The Pratt & Whitney R-1535 Twin Wasp Junior is an American aircraft engine developed in the 1930s. The engine was introduced in 1932 as a 14-cylinder version of the 9-cylinder R-985, and was a two-row, air-cooled radial design. Displacement was ; bore and stroke were both .

Variants

  • R-1535-11 -
  • R-1535-13 - ,
  • R-1535-44 -
  • R-1535-72 -
  • R-1535-94 -
  • R-1535-96 -
  • R-1535-98 -
  • R-1535-SB4-G -

Applications

Engines on display

  • There is a R-1535-96 on display at the New England Air Museum, Bradley International Airport, Windsor Locks, CT.
  • There is an R-1535 on display at the San Diego Air and Space Museum. It is now being installed in the museum's Hughes H-1 Racer reproduction project.
  • There is an R-1535 on display at Patria Group Linnavuori plant at Jyväskylä, Finland. It had belonged to Finnish Air Force Fokker D.XXI FR-137

Specifications (R-1535-SB4-G)

See also

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.
  • Pratt & Whitney - R1535 page
  • Shanaberger.com - R-1535