the.com/gyrocopter

a helicopter that refuses to power its own blades and somehow flies anyway

means A small aircraft that uses an engine-driven propeller for thrust while its overhead rotor spins freely from the airflow alone, providing lift without being powered.

from A 20th-century coinage stitched from the Greek 'gyros' (a ring, circle, or turn) and 'copter,' itself clipped from 'helicopter.' The 'gyro' part points to the spinning, unpowered rotor; the inventor Juan de la Cierva called his autorotating craft the 'autogiro' in the 1920s, and 'gyrocopter' grew up as a close cousin in that same family of whirling names.

unpowered rotor
top blades spin from airflow, not engine
cannot stall
physics makes it nearly impossible to fall
inventor
Juan de la Cierva pioneered it in 1920s
mailbox flight
James Bond flew one in You Only Live Twice
short takeoff
some launch in mere meters of runway
for instance

autogiro la cierva — spanish aircraft invented by juan de la cierva in 1923, first practical rotorcraft design

sikorsky s-300 — popular single-seat gyrocopter produced since 1992, widely used for recreation and training

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