Photograph of a United States Army Air Corps Douglas YO-31B aircraft parked by a hangar, likely at the National Air Races in Ohio, circa 1930s.Inscription: "U.S. Army. Douglas YO-31B."Inscription on verso: "Douglas O-31B. Conqueror G1-1570-C, 600…
Photograph of a United States Army Air Corps Douglas YO-31B aircraft parked by a hangar, likely at the National Air Races in Ohio, circa 1930s.Inscription: "U.S. Army. Douglas YO-31B."Inscription on verso: "Douglas YO-31B observation."Inscription…
Photograph of a United States Army Air Corps Douglas YO-31B aircraft parked by a hangar, likely at the National Air Races in Ohio, circa 1930s.Inscription: "U.S. Army. Douglas YO-31B."Inscription on verso: "Douglas YO-31B observation."Inscription…
Photograph of a United States Army Air Corps Douglas XO-31 aircraft (nose number 52) parked by a hangar, likely at the National Air Races in Ohio, circa 1930s.Inscription: "U.S. Army. Douglas XO-31."Inscription on verso: "Douglas XO-31. Conk 650.…
Photograph of three United States Army Air Corps Douglas O-38 aircraft in flight at the National Air Races in Cleveland, Ohio, April 14, 1931. Inscription: "U.S. Army. Douglas O38's. LM."Inscription on verso: "Douglas observation planes. Cleveland,…
Photograph of a United States Army Air Corps Douglas O-38B aircraft (tail number 2) parked at an airfield, likely at the National Air Races in Ohio, circa 1930s.Inscription: "U.S. Army. Douglas O-38B"Inscription on verso: "Douglas O-38B. PW Hornet…
Photograph of a United States Army Air Corps Douglas O-2H aircraft parked at an airfield, likely at the National Air Races in Ohio, circa 1930s. Inscription: "U.S. Army. Douglas O-2-H. LM."Item from page 26 of the LeRoy Milliren National Air Races…
Photograph of a United States Army Air Corps Douglas O-2H aircraft at the National Air Races in Cleveland, Ohio, June 13, 1931. A pilot sits in the cockpit.Inscription: "U.S. Army. Douglas O-2H."Inscription on verso: "Douglas Observation Plane. U.S.…
Photograph of a United States Army Air Corps Douglas O-25C aircraft (fuselage number 154) at an unidentified airfield, likely at the National Air Races in Ohio, circa 1930s. Two crewmembers sit in the plane.Inscription: "U.S. Army. Douglas…
Photograph of a United States Army Air Corps Douglas O-25C aircraft (fuselage number A.C. 30-160) parked at an unidentified airfield, likely at the National Air Races in Ohio, circa 1930s. Inscription: "U.S. Army. Douglas O-25C."Item from page 23 of…