A Manual Of Marine Engineering Comprising The Designing Construction And Working Of Marine Machinery PDF Download

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. 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.