Fijnje van Salverda, Johannes Gerardus Wybo, 1822-1900, Waring, George E. (George Edwin), 1833-1898 · New York, D. Appleton & co. · leaf 108
re must not fall on the centre of the bird, but must also be transferred to the rear. Cayley has in like manner maintained that this trans- ferring of the centre of air pressure takes place when- ever the wings are carried at a very acute angle with the direction of flight.* It also appears from… … Fig. 8. form an angle within which the head is placed as shown in Pig. 8. Other birds which fly rapidly carry their wings, on the other hand, to the rear, so that they form an angle in front as shown in Fig. 9. The changing of position of the centre of air pressure * L'ASronaute, 1877, p. 260.
Aeronautics
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