Fijnje van Salverda, Johannes Gerardus Wybo, 1822-1900, Waring, George E. (George Edwin), 1833-1898 · New York, D. Appleton & co. · leaf 111
AERIAL NAVIGATION. 98 tion to gravitation, is seen at a given point of its side- long descent to turn upward, which is accompanied with a loss of velocity of movement. This has been ex- plained by the fact that so long as the apparatus in descending had attained little speed, the influence of … Fig. 12. the curved course had not much effect; but, as the speed increases, the apparatus acts as under the influ- ence of a rudder and turns upward, as shown in the figure. The force of gravity which had caused the in- creasing velocity in the descent acts after the turning as a retarding…
Aeronautics
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