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The February 1942 issue of
Flying Aces magazine contained a quadruplet of 3-view scale drawings of
early airplanes: The German
Fokker D.V Albatros
fighter biplane, the American Army Air Force's
Douglas O-31A observation
monoplane, the
Ryan Navy
Seaplane, and Russian
I-16 Mosca fighter low wing monoplane. Per Wikipedia, "The
Douglas O-31 was the Douglas Aircraft Company's first monoplane
observation straight-wing aircraft used by the United States Army Air Corps. Anxious
to retain its position as chief supplier of observation aircraft to the USAAC, Douglas
developed a proposal for a high-wing monoplane successor to the O-2. A contract
was signed on January 7, 1930 for two XO-31 prototype aircraft, the first of them
being flown in December of the same year. A fabric-covered gull-wing monoplane,
the XO-31 had a slim corrugated dural-wrapped fuselage, carrying a tandem arrangement
of open cockpits for the pilot and observer. It had one 675 hp Curtiss GIV-1570-FM
Conqueror V-12 engine and fixed landing gear with provision for large wheel fairings."
Douglas O-31A
 Former Army Air Corps Douglas Observation
Span = 45' 11"
Length = 33' 10-1/2"
Corrugated Rudder and Elevator
Posted October 28, 2019
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