This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1893 Excerpt: ...The variation (supposing the water undisturbed) follows the following simple law. Let fa denote the mean slip angle of an element, and 2 fa the total amount of variation of the slip angle during a revolution. Let r/r denote the angle made by a fixed radius of the shaft with a fixed direction in space, and f the actual ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1893 Excerpt: ...The variation (supposing the water undisturbed) follows the following simple law. Let fa denote the mean slip angle of an element, and 2 fa the total amount of variation of the slip angle during a revolution. Let r/r denote the angle made by a fixed radius of the shaft with a fixed direction in space, and f the actual slip angle at the point of the revolution determined by yfr. Then f = fa + fa sin /r. If j is not large in comparison with fa, the slip will vary with sufficient approximation directly as the slip angle, or s=s0+s1 sini, where s, s0, and s1 apply not only to a single element, but to the whole propeller. 95 Disturb-ances of Water of Screw Race. Non-paral-lelism of Stream Lines. Stream Line Wake. Frictional Wake. Wave Motion Wake. So much for deviation of the shaft from the true level and fore-and-aft line. Now the water in which the screw works is disturbed by the action upon it of the ship. The disturbance is complex and has a powerful influence upon the screw's action. This complex disturbance may be regarded as made up of four comparatively simple components. a. The water closing in around the stern tends to flow parallel, or nearly so, to the surface of the hull, and hence to flow at an angle to the fore-and-aft vertical plane. This manner of flow will have but little effect upon the propeller of a single-screw vessel, since in the centre line the water tends to flow parallel-to the fore-and-aft plane. With twin-screw ships the result of the water flowing parallel to the hull is to produce a virtual deviation of the shaft. b. Owing to stream line action the velocity of the water in the neighbourhood of the stern is less than the normal speed. Figure 2 illustrates this fact, and shows also that the velocity will not be the same through...
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Add this copy of Resistance of Ships and Screw Propulsion to cart. $18.75, very good condition, Sold by Second Story Books rated 4.0 out of 5 stars, ships from Rockville, MD, UNITED STATES, published 2010 by Read Books.
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Book. Octavo; VG/paperback; brown spine with white text; facsimile reprint; covers have minimal exterior wear; fully intact binding; text block clean; illustrated; pp 234. 1366701. FP New Rockville Stock.
Add this copy of Resistance of Ships and Screw Propulsion to cart. $19.72, new condition, Sold by Ingram Customer Returns Center rated 5.0 out of 5 stars, ships from NV, USA, published 2022 by Legare Street Press.
Add this copy of Resistance of Ships and Screw Propulsion to cart. $29.16, new condition, Sold by Ingram Customer Returns Center rated 5.0 out of 5 stars, ships from NV, USA, published 2022 by Legare Street Press.
Add this copy of Resistance of Ships and Screw Propulsion to cart. $31.42, new condition, Sold by Ingram Customer Returns Center rated 5.0 out of 5 stars, ships from NV, USA, published 2013 by Europaischer Hochschulverlag Gmbh & Co. Kg.
