The Conquest of the Air Aeronautics Aviation History Theory Practice
The book The Conquest of the Air Aeronautics Aviation History Theory Practice was written by author Alphonse Berget Here you can read free online of The Conquest of the Air Aeronautics Aviation History Theory Practice book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is The Conquest of the Air Aeronautics Aviation History Theory Practice a good or bad book?
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We are not at present very well supplied with really reliable "data" concerning aerial screws; the excellent works of Colonel Renard have cleared the question with- out solving many individual points. Experiment alone is able to furnish data as to the practical value of a screw, and then it works " at a fixed point, " that is to say, moves upon an immovable dynamometer, which gauges its mechanical effort. This data is not absolutely sufficient, as in aerial work a scre. W does not furnish the s...ame useful effect as when working in a fixed point ; in any case, this data is necessary, and therefore above all tractive experiments by means of a dynamometer for each screw must be made. Once this result has been obtained, a serious question of vital importance arises, since, according as to how it is settled in one direction or the other, there will result an aviation apparatus presenting an appearance and qualities very different. This question is : Must the screw be of a very small diameter, and revolve at high speed, or must it, on the contrary, be very large, and turn " slowly " ?
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