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Transmission Gears, Mechanical, Electric, and Hydraulic, for Land and Marine Purposes



    THIS book is intended for engineers engaged in the application of internal-combustion engines for automobile, marine, and other purposes, and provides a fairly exhaustive treatment of friction- clutches, change-speed gears, and reversing methods. The book contains a large number of illustrations taken from working drawings; these drawings, together with the accompanying descriptions, constitute the most valuable part of the work, and should be very useful from the designer's point of view. The author is by no means so happy in the sections introducing calculations, and in some parts has produced so much confusion as to render these portions almost unreadable. Thus the terms “torque” and “driving effort” have entirely, different meanings, but the author uses them indiscriminately in his calculations on friction-clutches. The result is that, there are many errors in this section of the book, which should be revised thoroughly in the second edition. Further, calculations which “run on” in the text are difficult to follow; these are much more likely to be read and understood if displayed properly. There is also need for the introduction of clear methods of calculating epicyclic gears; those given are not likely to be of much assistance to the designer. As stated above, the value of the book consists in its collection of working drawings, and its value could be'greatly enhanced by thorough revision.

    Transmission Gears, Mechanical, Electric, and Hydraulic, for Land and Marine Purposes.



    By. Pp. xii + 164. (London: Charles Griffin and Co., Ltd., 1917.) Price 8s. 6d. net.

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