Biplane
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A biplane is a fixed-wing aircraft with two main wings stacked one above the other. The first powered, controlled aeroplane to fly, the Wright Flyer, used a biplane wing arrangement, as did many aircr
First World War Sopwith Camel biplane
1920s biplane hang glider
The Gloster Gladiator, a biplane World War II fighter
Soviet Antonov An-2 biplane from the 1940s
Wing configuration
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The wing configuration or planform of a fixed-wing aircraft is its arrangement of lifting and related surfaces.
The Spitfire wing may be classified as: "a conventional low-wing cantilever monoplane with unswept elliptical wings of moderate aspect ratio and slight dihedral".
A forward-swept-wing Sukhoi Su-47 alongside the more conventional swept-back Su-27 and Su-30MK2.