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Curtiss YP-20

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Curtiss YP-20
Role

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This page is a soft redirect. Biplane fighter #REDIRECTmw:Help:Magic words#Other
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Manufacturer

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Primary user

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Number built

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Curtiss YP-20 was a United States Army Air Service biplane fighter project.

In 1929, three Curtiss P-11 Hawks were ordered with 600 hp (447 kW) Curtiss H-1640 Chieftain engines. These proved a failure, and before completion, the third was converted to use a 9 cylinder 575 hp (429 kW) Wright Cyclone, being completed as the YP-20. Testing with the R1820 was prolonged, so the Army's intention to promptly switch to a Curtiss V-1570 Conqueror engine and redesignate the aircraft XP-22 was dropped; another P-11 was chosen for that instead.

Except for the engine change and its Townend ring cowling, the YP-20 was not drastically different from the P-6 from which both it and the P-11 derived, though the YP-20 had more fin and less rudder area,[1] and featured a steerable tailwheel, rather than the original skid.[2] Later, a crankcase cover, gear strut fairings, and wheel pants were added.

In June 1931, the AAC held a competition to evaluate the P-6, P-12, XP-22, and YP-20. The XP-22 came out the winner, but the YP-20 was given a nose and landing gear graft from the XP-22, becoming the XP-6E (P-6E prototype). With the addition of a supercharger and an enclosed cockpit, it was tested as the XP-6F.

Operators

23x15px United States

Specifications (original YP-20)

Data from U.S.Fighters, Lloyd Jones, Aero Publishers 1975.

General characteristics

Performance

2 × 0.30 in (7.62 mm) M1919 Browning machine guns (cowl)

Notes

  1. ^ Fitzsimons, Bernard, ed. Illustrated Encyclopedia of Weapons and Warfare (London: Phoebus, 1978), Volume 12, p.1255.
  2. ^ Fitzsimons, p.1255.

References

  • Fitzsimons, Bernard, ed. Illustrated Encyclopedia of Weapons and Warfare. Volume 12, pp. 1255–6, "Hawk, Curtiss Models 34 and 35 (P-1 to P-6 and F6C". London: Phoebus Publishing, 1978.
  • Donald, David, ed. Encyclopedia of World Aircraft. Etobicoke, ON: Prospero Books, 1997.
  • Jones, Lloyd S. U.S. Fighters. Fallbrook, CA: Aero Publishers, 1975.