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Igor Sikorsky performs the first successful single-rotor helicopter flight.
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Igor Sikorsky
Russian-American aviation pioneer (1889–1972)
Igor Ivanovich Sikorsky was a Russian-American aviation pioneer in both helicopters and fixed-wing aircraft. His first success came with the Sikorsky S-2, the second aircraft of his design and construction. His fifth airplane, the S-5, won him national recognition and F.A.I.…Source: Wikipedia (CC BY-SA)
Helicopter
Type of rotorcraft
A helicopter is a type of rotorcraft in which lift and thrust are supplied by horizontally spinning rotors. This allows the helicopter to take off and land vertically, to hover, and to fly forward, backward and laterally. These attributes allow helicopters to be used in…Source: Wikipedia (CC BY-SA)