The Steam Engine, Vol. 4

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Excerpt from The Steam Engine, Vol. 4: A Treatise on Steam Engines and Boilers, Comprising the Principles and Practice of the Combustion of Fuel, the Economical Generation of Steam, the Construction of Steam BoilersThe drum weighs 60 tons, and the total finished weight of the engines and drum together is 200 tons. The working pressure of steam in the boiler is 80 lbs. Per square inch, and the factor of safety in the design of the engines is io. The maximum speed attained by the pistons is about 700 feet per minute, when the engine makes 50 revolutions per minute. The engines are designed for raising 80 cwts. Of net coal from a depth of 700 yards, and the gross load lifted, including 5% tons of rope, is about 12 tons. Steam of 80 lbs. Pressure per square inch is supplied from four Lancashire boilers, 7 feet in diameter, 30 feet long.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis 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.