This report (Volume 1) deals with the evaluation of freight car brake shoe performance. Single car tests of four different makes of composition shoes and two different sets of cast iron shoes were performed. The tests included stop-distance tests, with loaded and empty cars under both wet and dry tread conditions, drag tests, static holding tests, static brake shoe tests and coasting tests. Brake shoe normal and tangential forces, brake cylinder pressures, car velocities and friction coefficients were recorded as functions of time, and stop-distances were noted for the stop-distance tests. Velocity, brake cylinder pressure, brake shoe normal force, brake shoe tangent force and wheel temperature were recorded as functions of time for the drag tests. Various cross plots to compare the performance of the shoe sets, as well as to determine the effects of velocity, temperature and moisture on braking were developed. Volume 2 of this report contains the complete computer-reduced brake shoe test data from the original magnetic tapes. It is of such size and of such limited interest that only a limited number of copies were produced.

  • Supplemental Notes:
    • Subtask 2.1.
  • Corporate Authors:

    Association of American Railroads Research Center

    3140 South Federal Street
    Chicago, IL  United States  60616

    Federal Railroad Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • MANOS, W P
    • Hawthorne, K L
    • Misner, G
    • Brown, T
  • Publication Date: 1981-4

Media Info

  • Features: Figures; Tables;
  • Pagination: 153 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00331900
  • Record Type: Publication
  • Report/Paper Numbers: AAR R-469 Tech Rpt.
  • Contract Numbers: DOT-FR-64228
  • Files: TRIS, USDOT
  • Created Date: Jun 12 1981 12:00AM