Animal locomotion, or Walking, swimming, and flying, with a dissertation on aëronautics (1874)
Pettigrew, James Bell, 1834-1908 · New York : D. Appleton & company · leaf 132
, slightlyupwards. From this it follows, that when the wing rises the PROGRESSION IN OR THROUGH THE AIR. 105 body falls, and vice versd, the wing describing the arc of alarge circle (//), the body (b), or the weights representing it(w w) describing the arc of a much smaller circle. The body, … w b FIG. 52. therefore, as well as the wing, rises and falls in flight. Whenthe wing descends it elevates the body, the wing being activeand the body passive; when the body descends it elevatesthe wing, the body being active and the wing passive. Theelevator muscles, and the reaction of the air on…
Animal locomotion · Aeronautics
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