Tags: Aircraft.
The Keystone XO-15 was an American prototype observation aircraft built by the Keystone Aircraft Corporation for the United States Army Air Corps First flown in 1930 only a single prototype was built.
Tags: Aircraft.
The Keystone XO-15 was an American prototype observation aircraft built by the Keystone Aircraft Corporation for the United States Army Air Corps First flown in 1930 only a single prototype was built.
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