Details on two British manpowered aircraft projects, Hartman ornithopter and Perkins inflatable-wing machine; in ornithopter, flapping action of wing is obtained by rowing action of pilot's arms, which hold special hand-grips attached to parallelogram linkage; inflatable-wing machine incorporates special form of transmission to couple to propeller bicycle pedals by which manpower will be exerted; diagrams and data.
Muscle-men emerge
Flight
Flight ; 76 , n 2642
1959
Aufsatz (Zeitschrift)
Englisch
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