Fijnje van Salverda, Johannes Gerardus Wybo, 1822-1900, Waring, George E. (George Edwin), 1833-1898 · New York, D. Appleton & co. · leaf 208
PRACTICAL AIR SHIP. 195 would be quite unattainable with flat surfaces in screws and aeroplanes, and even if it were approached it could not be maintained with the materials suitable for a fly- ing machine on account of their want of rigidity and stability when set at small angles. The accompanying… … Fig. 25.—Probable Arrangement or Stream Lines during Movement oe Convexed and Concaved Plane. lines begin to be formed in advance of the plane, acting as if they felt its approach, and dividing at a slightly higher level than its leading edge. Those that pass be- low are bent downward, but recurve…
Aeronautics
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