Details of twin-engine light helicopter, developed for Rotorcraft Ltd, by Servotec Ltd; carrying pilot and one passenger, aircraft can fly over stage lengths up to 200 mi at speed of 100 mph while providing vertical takeoff and landing capability, twin-engined reliability and minimum operating costs; Grasshopper is sustained in air by 2 main lifting rotors arranged coaxially and rotating in opposite directions; structural details; specification data and estimated performance characteristics.
Grasshopper helicopter
Aircraft Eng
Aircraft Engineering ; 34 , n 405
1962
Aufsatz (Zeitschrift)
Englisch
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