CONTROLLING SLACK ACTION IN A UNIT TRAIN

Slack action in long railroad trains can give rise to damaging longitudinal forces. This paper develops criteria for the occurrence of unplanned slack action in a unit train on a gradient change. It is shown that remote-controlled locomotives at the rear of the train can substantially reduce the incidence of such slack action. This is achieved by maintaining a unimodal draft force profile throughout the train. From these results it is suggested how a train driving schedule could be determined for a particular run by considering the train parameters and the profile of the route.

  • Supplemental Notes:
    • Contributed by the Rail Transportation Division of the ASME for presentation at the Joint ASME-IEEE Railroad Conference held in Washington, D.C., March 30-April 1, 1977.
  • Corporate Authors:

    American Society of Mechanical Engineers

    Two Park Avenue
    New York, NY  United States  10016-5990
  • Authors:
    • Kerr, A J
  • Publication Date: 1977-3-30

Media Info

  • Features: Appendices; Figures; References;
  • Pagination: 8 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00152433
  • Record Type: Publication
  • Source Agency: American Society of Mechanical Engineers
  • Report/Paper Numbers: Paper 77-RT-12 Conf Paper
  • Files: TRIS
  • Created Date: May 11 1977 12:00AM