Curtiss XA-6

Last revised July 3, 2000

Curtiss O-1B serial number 27-263 was redesignated XO-18 when used as a flying testbed for the experimental 600 hp Curtiss H-1640 Chieftain twelve-cylinder twin-row air-cooled radial engine. The Chieftain engine proved to be unsuitable and the XO-18 was refitted with the standard Curtiss V-1150-5 engine and reverted to O-1B configuration. The XA-6 was a proposed attack version of the XO-18. However, the XA-6 was cancelled before anything could be built.


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