A Manual of Marine Engineering: Comprising the Design, Construction, and Working of Marine Machinery (Classic Reprint) - Hardcover

A. Edward Seaton

9780331934762: A Manual of Marine Engineering: Comprising the Design, Construction, and Working of Marine Machinery (Classic Reprint)

Hardcover

ISBN 10: 0331934760 ISBN 13: 9780331934762

Publisher: Forgotten Books, 2018

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Excerpt from A Manual of Marine Engineering: Comprising the Design, Construction, and Working of Marine Machinery

In 1880, the triple compound engine was little more than a dream; in fact, there were then many people who believed in, and continued to use, the ordinary expansive engine. The highest boiler pressure used by advanced and enterprising engineers was 100 lbs. Per square inch, and few of them had ventured even so far as that. Steel crank-shafts, and other heavy forgings made of steel, were looked upon as luxuries to be indulged in only by the British and Foreign Governments, and wealthy corpora tions. At the present time ingot steel forgings are common enough, and not very much dearer than iron ones. Engines with three cranks were few and far between, and generally limited to very large compound engines, in which a single low-pressure cylinder would have been abnormally large. Today, most of the ships recently built have engines with three cranks, and even tug boats and other small steamers are generally fitted with three crank triple engines, While larger vessels not infrequently have four-crank triple and quadruple engines.

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