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Doak Aircraft Company from Los Angeles film of US Army experimental vertical and takeoff and landing (VTOL) aircraft. Only one built, jet engine-2 ducted fan test flight footage. From the archives of the San Diego Air and Space Museum. Please do not use for commercial purposes without permission. http://www.sandiegoairandspace.org/research/index.
Doak aircraft company Aircraft (Invention) Army Flight test Los Angeles VTOL