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.
- 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.
American Society of Mechanical EngineersTwo Park Avenue
New York, NY United States 10016-5990
- Kerr, A J
- Publication Date: 1977-3-30
- Features: Appendices; Figures; References;
- Pagination: 8 p.
- TRT Terms: Couplers; Force; Slave locomotives; Train operations; Train track dynamics; Unit trains
- Old TRIS Terms: Grade operations; Slack action
- Subject Areas: Railroads; Vehicles and Equipment;
- 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