A Project for Flying

In Earnest at Last!

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Author: Robert Hardley
Published: 1871
Language: English
Wordcount: 10,850 / 39 pg
Flesch-Kincaid Reading Ease: 32.8
LoC Category: TL
Downloads: 258
Added to site: 2007.05.13
mnybks.net#: 16917
Origin: gutenberg.org
Genre: Non-fiction
Excerpt

pace here again prevents us from entering into a detail of the experiments by means of which the true solution of this question has been arrived at, and the proper angle determined at which the superficial spiral exercises the greatest amount of propulsive force of which such an engine is capable. These experiments have been chiefly carried on by Mr. Smith, the ingenious and successful adapter of this instrument to the propulsion of steam vessels, for a series of years, with the greatest care, and at a very considerable expense; and the result of his experience gives an angle of about 67° or 68° for the outer circumference of the screw, as that productive of the maximum effect; a conclusion which is further verified by the experiments of Sir George Cayley, of Mr. Charles Green, the most celebrated of our practical aeronauts, and others who have employed their attention upon the subject. This conclusion requires only one modification, which ought to be noticed; namely, that in cases of extreme velocity

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