This paper discusses a well-known tool for calculating train resistance to motion and its suitability for describing operations at high speed. The tool, originally developed by Armstrong and Swift, also permits the estimation of the contribution to aerodynamic resistance of various features of the architecture of a train. They compare this approach with the results of other formulae for calculating train resistance, as well as published measurements taken during experimental work. It is concluded that Armstrong and Swift's expressions can be considered to provide good estimates for the coefficients to the Davis equation for both high-speed and suburban trains that fit the British loading gauge and have a power car-trailer ratio of 1:3 or less without the need for run-down testing. However, the expressions are not suitable for trains with a predominance of powered axles.


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    Title :

    Review of methods to measure and calculate train resistances


    Contributors:
    Rochard, B.P. (author) / Schmid, F. (author)


    Publication date :

    2000


    Size :

    15 Seiten, 9 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




    A review of methods to measure and calculate train resistances

    Rochard, B. P. / Schmid, F. | British Library Online Contents | 2000



    A review of methods to measure and calculate train resistances

    Rochard, B P / Schmid, F | SAGE Publications | 2000


    Train resistances

    Barbier, M. | Engineering Index Backfile | 1897


    Train resistances at high speeds

    Engineering Index Backfile | 1939