Animal locomotion, or Walking, swimming, and flying, with a dissertation on aëronautics (1874)
Pettigrew, James Bell, 1834-1908 · New York, D. Appleton & company · leaf 283
avewing makes an admirable propeller if its tip be directedvertically downwards, and the wing lashed from side to sideiVith a sculling figure-of-8 motion, similar to that executed bythe tail of the fish. Three wave wings may be made to actin concert, and with a very good result; two of them… … Fig. 130.—Aerial wave screw, whose blades are slightly twisted (a b,cd/ef,gJi), so that those portions nearest the root (rf/t) make a greater anglewith the horizon than those parts nearer the tip (&/). The angle is thusadjusted to the speed attained by the different portions of the screw.…
Animal locomotion · Aeronautics
Internet Archive · Biodiversity Heritage Library · Public Domain Mark 1.0. Free to use for anything.
