Single place amphibious helicopter derives its name from its unusual layout and control; pilot stands on small platform beneath which contrarotating rotors whirl, flotation pontoons being disposed under roters; prototype aircraft is powered by Mercury outboard racing motor, liquid cooled twin-cylinder 2-stroke unit with rotary valve induction. (See also Am Helicopter v 38 n 5 Apr 1955 p 13, 15)
De lackner DH-4 heli-vector
Aeroplane
Aeroplane ; 88 , n 2281 ; p 443
1955
Aufsatz (Zeitschrift)
Englisch
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