First Flights with Neil Armstrong - Season 3 Episode 1 -
Whirling Wings: Evolution of the Rotorhead
From Cierva's breakthrough in autogyro design, to the state-of-the-art BK-117, the heart of the helicopter story has been the rotorhead. Early helicopters were complex, dangerous flying machines, prone to failure. For the men and women who took the controls, concentration and daring were essential.
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