The Tractive Resistance on Curves of a 28-Ton Electric Car (Classic Reprint)

Excerpt from The Tractive Resistance on Curves of a 28-Ton Electric Car The tractive resistance of cars running on curved track is greater than their resistance on straight track of like grade and construction. This excess is generally termed curve resistance or resistance due to curvature. A knowledge of its magnitude is needed in many problems which present themselves in connection with steam and electric rail way design and operation. While these problems are more important and 'more numerous on steam roads, they are not unimportant nor infrequent on electric roads. Nearly all the existing information re garding curve resistance has arisen from tests and experience with trains on steam railways, and it:is doubtful whether the values of curve resistance thus derived are valid for the single self-propelled cars used on electric lines. Such considerations led the Railway Engineering Department of the University of Illinois to make the tests, the results of which are presented in this bulletin. The tests were undertaken to measure, the curve resistance of a 28-ton electric car, owned by the department, with the view of deter~ mining its value at various speeds and on as great a variety of curves as were available on the lines of the Illinois Traction System, upon which the experiments were conducted. The results established for this car the relations between curve resistance and speed and between curve resistance and rate of curvature. 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.