Animal locomotion or walking, swimming, and flying : with a dissertation on aëronautics (1873)
Pettigrew, James Bell, 1834-1908 · London : Henry S. King & Co. · leaf 240
ringfellow stated that his machine occasionally left the wire, and was sustained by its superimposed planes alone. AERONAUTICS. 215 balloon and all forms of fixed aeroplanes. In nature, smallwings driven at a high speed produce the same result as largewings driven at a slow speed (compare fig. oS,… … Fig. 111.—Cayleys Flying Apparatus. The Aerial Screw.—Our countryman, Sir George Cayley,gave the first practical illustration of the efficacy of the screwas applied to the air in 1796. In that year he constructed asmall machine, consisting of two screws made of quill feathers(fig. 111). Sir George…
Animal locomotion · Physiology · Aeronautics
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