 | Aeronautical Society of Great Britain - 1871 - 588 pages
...resistance of which was determined by the valuable experiments of the French Academy, and it gave ^ of the resistance which the same surface would have...a bird in the act of skimming) with a velocity of 23'6ft. per second, receive a pressure of T4^ of a pound perpendicular to itself; and if we allow the... | |
 | James Means - 1894 - 224 pages
...resistance of which was determined by the valuable experiments of the French Academy; and it gave ^ of the resistance, which the same surface would have...a bird in the act of skimming) with a velocity of 23.6 feet per second, receive a pressure of -fa of a pound perpendicular to itself. And, if we allow... | |
 | Sir George Cayley, Bart - 1910 - 114 pages
...resistance of which was determined by the valuable experiments of the French Academy, and it gaveT4n of the resistance which the same surface would have...a bird in the act of skimming) with a velocity of 23.6 ft. per second, receive a pressure of ^*c of a pound perpendicular to itself; and if we allow... | |
 | 2003 - 776 pages
...resistance of which was determined by the valuable experiments of the French Academy; and it gave /fo of the resistance, which the same surface would have...a bird in the act of skimming) with a velocity of 23.6 feet per second, receive a pressure of /Io of a pound perpendicular to itself. And, if we allow... | |
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... edge. This may or may not be the true theory, but it appears to me to be the most probable account of a phenomenon, which the flight of birds proves to exist. Six degrees was the most acute angle, the resistance of which was determined by the valuable... 