The Full Wiki

More info on XP-22 Hawk

XP-22 Hawk: Wikis


Note: Many of our articles have direct quotes from sources you can cite, within the Wikipedia article! This article doesn't yet, but we're working on it! See more info or our list of citable articles.


From Wikipedia, the free encyclopedia

XP-22 Hawk
Role Experimental biplane fighter
Manufacturer Curtiss Aeroplane and Motor Company
Primary user United States Army Air Force
Number built 1

The Curtiss XP-22 Hawk was an 1930s American experimental biplane fighter built by Curtiss for evaluation by the United States Army Air Service.



In 1929, the AAC ordered three P-11 Hawks for testing of the 600 hp (447 kW) H-1640 Chieftain engine. This engine proved a failure, and before completion, one of the three was converted to use a 9-cylinder 575 hp (429 kW) Cyclone, being completed as the YP-20. Testing with the R-1820 was prolonged, so the Army acquired another of the three P-11s, instead. This became the XP-22.

A number of changes were made for installing the 700 hp (520 kW) Curtiss V-1570 Conqueror engine. The radiator was relocated, a new cowl was fitted, and the tail was given more fin and less rudder area,and featured a steerable tailwheel, rather than the original skid. For these changes, Curtiss charged only US$1.[1]

During testing, the XP-22 underwent a number of alterations and improvements, including a change from a three-strut landing gear to a single streamlined strut, later fitted with wheel pants. Fillets were added where struts joined the wing and the tail was briefly reduced in area, to P-6 standard.[1] The XP-22 was also the Army's first fighter capable of 200 mph (320 km/h), achieving 202 mph (325 km/h).[2]

In June 1931, the AAC held a competition to evaluate the P-6, P-12, YP-20, and XP-22. The XP-22 came out the winner, earning a contract for 45 aircraft as the Y1P-22. Following the trials, the XP-22 donated a nose and landing gear graft to the YP-20, which became the XP-6E, and the 45 production aircraft were completed to this standard.

Curtiss XP-22 060906-F-1234P-009.jpg


 United States


Data from U.S.Fighters, Jones 1975, p. 58.

General characteristics





  1. ^ a b Fitzsimons 1978, p. 1255.
  2. ^ Jones 1975, p. 58.


  • Donald, David, ed. Encyclopedia of World Aircraft. Etobicoke, ON: Prospero Books, 1997. ISBN 1-85605-375-X.
  • 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.
  • Jones, Lloyd S. U.S. Fighters: 1925-1980s. Fallbrook, California: Aero Publishers, Inc., 1975. ISBN 0-8168-9200-8.


Got something to say? Make a comment.
Your name
Your email address