Author: Robert Gordon Blaine
Publisher: Forgotten Books
ISBN: 9780332961217
Category : Technology & Engineering
Languages : en
Pages : 234
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Excerpt from Elementary Lessons With Numerical Examples in Practical Mechanics and Machine Design Self conceit and real ignorance are supposed to be the characteristics of their most energetic readers. The teaching power of this collection of examples has already been well tried. Students who have gone through them show that they have obtained a real working knowledge of the application of the principles of Mechanics to Engineering and Machine Design, and that their knowledge is always ready for use. Each exercise fixes firmly in the mind of the student the fact that a certain principle is of importance outside examination rooms. He is not tempted to calculate in cases where actual experimental trial and observation will show him the best solution of a problem, and when he works out an answer which every practical illiterate mechanic knows to be ten times too great, he will not compla cently rest satisfied with this absurd answer and talk about its being theoretically right. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Author: Robert Gordon Blaine
Publisher:
ISBN:
Category : Machine design
Languages : en
Pages : 240
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Author: Robert Gordon Blaine
Publisher:
ISBN:
Category : Machine design
Languages : en
Pages : 208
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Author: R. G. Blaine
Publisher: Rarebooksclub.com
ISBN: 9781230171302
Category :
Languages : en
Pages : 58
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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1896 edition. Excerpt: ...cent. 8. In the case of certain kinds of shafting it is possible to express M as a multiple of T. Thus M = k T. Rankine has found the following values of k: --For such cases as propeller-shafts k varies from-25 to-5. For ordinary light shafting in mills... k -75 to-1. And for crank-shafts and other heavy For each of the cases above mentioned deduce the constant a in the simple formula for the diameter Note.--The values here found agree with values of the multiplier c given at page 99. 9. Find the two equal stresses (tensile and shear) which combined will produce a resultant tensile stress of 66,000 lb. per sq. inch. 10. A cylindric shaft transmits 30 HP at 150 revolutions per minute, and is subjected to a bending moment equal to the twisting moment; find the diameter of the shaft, if the safe shear stress of the material is 9,000 lb. per sq. inch. ANSWEES. 1. Yes. The resultant stress is 5 6 tons per square inch. 2. 6,057-8 lb. per square inch. 3. 6,428 lb. per square inch LESSON XXIV. OVERHUNG CBANK. CRANK-PINS. LENGTHS OP BEARINGS, ETC. A Very good illustration of combined twisting and bending actions is the case of an overhung crank (Fig. 58). Let P be the total push, or pull, of the connectingrod at right angles to the direction of the crank. Fig. 68. Then T = P x A C, and M = P x B C, the resultants of all the forces acting on the journal and crank-pin being assumed to pass through their centres respectively. Then using our rule for combining twisting and bending moments, we have--T( = PxBC + x B C)2 + (P x AC)"2 = PBC + V/b C2 + A C2.-. Te = P (B C + A B). Hence we calculate the twisting moment for an overhung crank as if the crank were of a length equal to the horizontal distance B C, plus the sloping distance A B....
Author:
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ISBN:
Category : Library catalogs
Languages : en
Pages : 504
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Author: British Museum. Department of Printed Books
Publisher:
ISBN:
Category : English literature
Languages : en
Pages : 674
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Author:
Publisher:
ISBN:
Category : Art
Languages : en
Pages : 994
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Author: Finsbury (England). Public Library
Publisher:
ISBN:
Category : Catalogs, Classified
Languages : en
Pages : 482
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Author: Institution of Civil Engineers (Great Britain). Library
Publisher:
ISBN:
Category : Engineering
Languages : en
Pages : 530
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Author: Borough of Portsmouth Free Public Libraries. Central Library
Publisher:
ISBN:
Category :
Languages : en
Pages : 370
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