Fijnje van Salverda, Johannes Gerardus Wybo, 1822-1900, Waring, George E. (George Edwin), 1833-1898 · New York, D. Appleton & co. · leaf 165
RIAL NAVIGATION. 152 = 131 pounds per horse power before reaching the limit of the lifting force. He then considers whether or not the Norwood boilers and engines will meet the conditions set up. He supposes a pair of propeller wheels of suitable di- mensions to be placed in a framework… … Fig. 14.—Scale, one-sixteenth incli = l foot. The apparatus will rise when the upward thrust caused by the revolution of the propellers is greater than the weight of the machine. The maximum speed of ascent will depend on the amount of reserve lifting power. This, and the speed of descent, may be…
Aeronautics
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