Plates, Naval Reciprocating Engines and Auxiliary Machinery

Bücher

Angebote / Angebote:

Excerpt from Plates, Naval Reciprocating Engines and Auxiliary Machinery: A Text-Book for the Instruction of Midshipmen, at the U. S. Naval AcademyIn estimating the power required for the propulsion of any proposed hull, the Navy Department has practically abandoned all other methods than that of trials of the model of the proposed hull in the model tank, and from the results of these trials, obtains the curves of effective horsepowers based on speeds as abscissas. Other methods are used, however, as checks.By the term Effective Horsepower is meant that power which when applied to a tow rope would pull the hull through the water at the desired speed.The effective horsepower curves, as usually supplied to the Designing Branch of the Bureau, from which to estimate the necessary power for propulsion, are the curves of effective horsepower for the bare hull only. Before the estimation of power can be made, the expected increase of effective horsepower due to the resistance of the appendages, or excrescences, as they are sometimes called, must be added to the bare hull power curves to obtain the total effective horsepower necessary.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.