Keystone XO-15
Overview
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.
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.
