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Pratt & Whitney R-1535 Twin Wasp Junior

1930s American aircraft engine

1930s American aircraft engine

FieldValue
nameR-1535 Twin Wasp Junior
imagePratt & Whitney R-1535 Twin Wasp Junior.jpg
captionPratt & Whitney Twin Wasp Junior, at the National Museum of Naval Aviation, Pensacola, Florida
engine_typeRadial engine
national_originUnited States
manufacturerPratt & Whitney
first_run1932
major_applications{{ubl
developed_fromPratt & Whitney R-985 Wasp Junior
  • Bristol Bolingbroke
  • Curtiss SBC-3 Helldiver
  • Hughes H-1 Racer
  • Vought SB2U Vindicator

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 1535 cuin; bore and stroke were both 5+3/16 in.

Variants

  • R-1535-11 - 750 hp
  • R-1535-13 - 750 hp, 825 hp
  • R-1535-44 - 625 hp
  • R-1535-72 - 650 hp
  • R-1535-94 - 825 hp
  • R-1535-96 - 825 hp
  • R-1535-98 - 700 hp
  • R-1535-SB4-G - 825 hp

Applications

  • Bellanca 28-70
  • Boeing XF6B
  • Breguet 695
  • Bristol Fairchild Bolingbroke (Canadian licence-built version of the Blenheim)
  • Canadian Car and Foundry FDB-1
  • Consolidated XB2Y
  • Curtiss SBC-3 Helldiver
  • Douglas O-46
  • Fokker G.I (G.I The Wasp)
  • Fokker D.XXI (Finnish licence-built series 4 and 5)
  • Great Lakes BG
  • Grumman F2F
  • Grumman F3F-1
  • Grumman XJF-1 Duck (prototype only)
  • Grumman XSBF
  • Grumman XSF-2
  • Hughes H-1 Racer
  • Miles Master
  • Northrop A-17
  • Northrop BT
  • Northrop XFT-2
  • Vought SBU Corsair
  • Vought SB2U Vindicator
  • Vought V-141
  • Vought XF3U
  • Vought XO4U-2

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.

Specifications (R-1535-SB4-G)

and start a new, fully-formatted line with -- |power/weight=0.76 hp/lb

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.

References

  1. "P&W Twin Wasp Junior(R-1535)".
  2. [http://neam.org/index.php?option=com_content&view=article&layout=edit&id=1130 "Pratt & Whitney R-1535-96 Twin Wasp Junior"]
  3. Tsygulev. (1939). "Aviacionnye motory voennykh vozdushnykh sil inostrannykh gosudarstv (Авиационные моторы военных воздушных сил иностранных государств)". Gosudarstvennoe voennoe izdatelstvo Narkomata Oborony Soyuza SSR.
Info: Wikipedia Source

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