Word: autogiro
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Dates: during 1950-1959
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...first White House Autogiro landing was made April 22, 1931, when James Ray stepped out of a Pitcairn to receive the 1930 Collier Trophy from President Hoover. President Taft witnessed the first airplane landing there (by Harry Atwood...
...small wing and one or more propellers on a conventional helicopter. After the craft is in the air, the rotor is disconnected from the engine and the propellers take over. The rotor continues to spin, driven by the air rushing past it, like the rotor of an autogiro.* This "windmilling" supplies some lift; the wing provides the rest...