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    Transactions of the American Society of Civil Engineers, Vol. LXX, Dec. 1910 Locomotive Performance On Grades Of Various Lengths, Paper No. 1172
    Transactions of the American Society of Civil Engineers, Vol. LXX, Dec. 1910 Locomotive Performance On Grades Of Various Lengths, Paper No. 1172
    Transactions of the American Society of Civil Engineers, Vol. LXX, Dec. 1910 Locomotive Performance On Grades Of Various Lengths, Paper No. 1172
    Ebook43 pages29 minutes

    Transactions of the American Society of Civil Engineers, Vol. LXX, Dec. 1910 Locomotive Performance On Grades Of Various Lengths, Paper No. 1172

    By B. S. (Beverly S.) Randolph

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    LanguageEnglish
    PublisherArchive Classics
    Release dateNov 25, 2013
    Transactions of the American Society of Civil Engineers, Vol. LXX, Dec. 1910 Locomotive Performance On Grades Of Various Lengths, Paper No. 1172

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      Transactions of the American Society of Civil Engineers, Vol. LXX, Dec. 1910 Locomotive Performance On Grades Of Various Lengths, Paper No. 1172 - B. S. (Beverly S.) Randolph

      The Project Gutenberg EBook of Transactions of the American Society of

      Civil Engineers, Vol. LXX, Dec. 1910, by Beverly S. Randolph

      This eBook is for the use of anyone anywhere at no cost and with

      almost no restrictions whatsoever. You may copy it, give it away or

      re-use it under the terms of the Project Gutenberg License included

      with this eBook or online at www.gutenberg.org

      Title: Transactions of the American Society of Civil Engineers, Vol. LXX, Dec. 1910

      Locomotive Performance On Grades Of Various Lengths, Paper No. 1172

      Author: Beverly S. Randolph

      Release Date: July 3, 2006 [EBook #18747]

      Language: English

      *** START OF THIS PROJECT GUTENBERG EBOOK AMERICAN SOCIETY OF CIVIL ENGINEERS ***

      Produced by Juliet Sutherland, Sigal Alon and the Online

      Distributed Proofreading Team at http://www.pgdp.net

      AMERICAN SOCIETY OF CIVIL ENGINEERS

      INSTITUTED 1852

      TRANSACTIONS

      Paper No. 1172

      LOCOMOTIVE PERFORMANCE ON GRADES OF VARIOUS LENGTHS.

      By Beverly S. Randolph, M. Am. Soc. C. E.

      With Discussion by Messrs. C. D. Purdon, John C. Trautwine, Jr., and Beverly S. Randolph.

      In the location of new railways and the improvement of lines already in operation, it is now well recognized that large economies can be effected by the careful study of train resistance due to grades and alignment, distributing this resistance so as to secure a minimum cost of operation with the means available for construction.

      While engaged in such studies some years ago, the attention of the writer was attracted by the fact that the usual method of calculating the traction of a locomotive—by assuming from 20 to 25% of the weight on the drivers—was subject to no small modification in practice.

      In order to obtain a working basis, for use in relation to this feature, he undertook the collection of data from the practical operation of various roads. Subsequent engagements in an entirely different direction caused this to be laid aside until the present time. The results are given in Table 1, from which it will be seen that the percentage of driver weight utilized in draft is a function of the length as well as the rate of grade encountered in the practical operation of railways.

      In this table, performance will be found expressed as the percentage of the weight on the drivers which is utilized in draft. This is calculated on a basis of 6 lb. per ton of train resistance, for dates prior to 1880, this being the

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