A perfect example of the aircraft design revolution in the 1930s (the Golden Age of aeronautics), the DC-3 has beautiful streamlining; a monoplane (single-wing) configuration; retractable landing gear; an all-metal structure, including a semi-monocoque (shell-like) fuselage; wind flaps for high lift during landing and take-off; efficient constant-speed propellers; and a low-drag NACA cowling around each engine. The engines ran on improved, high-octane aviation gasoline. The DC-3 ushered in the era of the mature propeller-driven airplane.
This object is on display in Thomas W. Haas We All Fly at the National Air and Space Museum in Washington, DC.