344/561
Tailles de photo
✔ XXS - minuscule (144 x 240)✔ XS - très petit (194 x 324)
✔ S - petit (259 x 432)
✔ Original (309 x 515)
Da Vinci’s third scheme for human flight, was a framed sail on which a man could ride downward, if not upward. This device never fails to navigate with its confiding sailor. Sometimes he lands in one posture, again in another; but voyage he must, with the certainty of gravitation. Leonardo is, therefore, the father of the parachute. This, in turn, has had a varied offspring. The common parachute, the aërial glider, the soaring machine, or passive aëroplane, that rides the wind without motive power and without loss of energy.
- Auteur
- Aërial Navigation
A Popular Treatise on the Growth of Air Craft and on Aëronautical Meteorology
By Albert Francis Zahm
Published in 1911
Available from gutenberg.org - Ajoutée le
- Samedi 1 Janvier 2022
- Dimensions
- 309*515
- Tags
- Albums
- Technology / Transport / Air
- Visites
- 717
- Téléchargements
- 46