Number 21 was the name of an aircraft that aviation pioneer Gustave Whitehead claimed to have flown near Bridgeport Connecticut on August 14 1901. The flight was reported in the August 18 1901 issue of The Bridgeport Sunday Herald but the claims have been disputed. A monoplane design powered by a 20 hp acetylene engine - it started the takeoff run using the engine to power the wheels; upon takeoff power would be switched to the propellers.
Made by Gustave Whitehead.