Curtiss XP-11

The Curtiss XP-11 was the designation given to three Hawk biplanes that were to have been powered by the Curtiss Chieftain engine, but the failure of that engine meant that none were completed as P-11s.

The Curtiss H-1640 Chieftain was a two-bank 12-cylinder air cooled engine that was being developed at the same time as the V-1570 Conqueror. Before the P-11s had been completed it became clear that the Chieftain was an unsatisfactory design, and it was decided to complete them with other engines.

Two were given Conqueror engines and became P-6Ds while the third was given a Wright Cyclone radial engine and became the YP-20. After some further work this became the prototype for the P-6E.

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How to cite this article: Rickard, J (20 December 2012), Curtiss XP-11 , http://www.historyofwar.org/articles/weapons_curtiss_XP-11.html

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