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The Pratt & Whitney R-1340 Wasp is an aircraft engine of the reciprocating type that was widely used in American aircraft from the 1920s onward. It was the Pratt & Whitney aircraft company's first engine, and the first of the famed Wasp series. It was a single-row, nine-cylinder, air-cooled, radial design, and displaced 1,344 cubic inches (22&nbsp;L); bore and stroke were both 5.75&nbsp;in (146&nbsp;mm). A total of 34,966 engines were produced.

As well as numerous types of fixed-wing aircraft, it was used to power helicopters, the Agusta-Bell AB.102 and the Sikorsky H-19, and a class of airship, the K-class blimp.

In 2016, it received designation as a Historic Engineering Landmark from the American Society of Mechanical Engineers.

Variants

Note: R for Radial and 1340 for 1340 cubic inch displacement.

;R-1340-7: ,

;R-1340-8:

;R-1340-9: ,

;R-1340-16:

;R-1340-17:

;R-1340-19:

;R-1340-19F:

;R-1340-21G:

;R-1340-22:

;R-1340-23:

;R-1340-30:

;R-1340-31:

;R-1340-33:

;R-1340-48:

;R-1340-49:

;R-1340-AN1: ,

;R-1340-AN2: , 3:2 geared prop shaft

;R-1340-B:

;R-1340-D:

;R-1340-S1D1:

;R-1340-S1H1-G:,

;R-1340-S3H1:

;R-1340-T1D1:

Applications

thumb|R-1340 powered [[Curtiss SOC Seagull, 1939]]

thumb|right|The gondola of a US Navy [[K-class blimp. One of its two R-1340 engines is being serviced, 1943]]

Engines on display

  • There are a Wasp A and three Wasp C's on display at the New England Air Museum, Bradley International Airport, Windsor Locks, CT.

Specifications (R-1340-S1H1-G)

thumb|right|Pratt & Whitney R-1340 installed in a [[T-6 Texan]]

See also

References

Notes

Bibliography

  • Bridgman, Leonard. Jane's All the World's Aircraft 1945-46. Hammersmith, London: HarperCollinsPublishers (1994 reprint).
  • 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.
  • "Index of Wasp & R-1340 Designated Engines", a scanned Pratt & Whitney reference document from 1956 detailing the different Wasp versions, their specifications, and the aircraft they were installed in.
  • There is a "Pratt & Whitney 1340N Radial Engine" in use on a T-6 Texan at Pacific Warbirds, Oahu, HI