Hoppi-Copter, being one-place craft, often raises question of method by which prospective buyers will be taught to fly; since machine differs so greatly from all other helicopters, flying school will have to be established; features of ground and flight training.
Pilot instruction on hoppi-copter
Am Helicopter
American Helicopter ; 10 , n 6
1948
Aufsatz (Zeitschrift)
Englisch
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`Copter pilot freed from shackles of stick
Engineering Index Backfile | 1956
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