In an effort to explain why the outward forces on the trucks of propelled trains are greater than can be explained by the angle present between center lines of the vehicles, British Railways conducted a test on curved track to determine vertical loads and lateral forces. Six special baseplates were installed on adjacent sleepers on the test curve to record vertical loads and lateral forces between rail and sleeper. It was found that lateral forces towards the outer rail when propelled are considerably greater than when hauled. A more severe speed restriction on a particular curve is of little assistance because speed, and hence centrifugal force, is low anyway. The increase of lateral force towards the outer rail when the train is propelled is accompanied, at the leading outer wheel of a bogie, by increased vertical load so that the possibility of flange-climbing derailment is not altered appreciably. Propulsion on a sharp curve produces an overturning movement on the train. For severe locations its magnitude should be restricted by a limitation on tractive effort.

  • Corporate Authors:

    Temple Press Limited

    161-166 Fleet Street
    Longon EC4,   England 
  • Authors:
    • Pocklington, A R
    • Brown, T P
  • Publication Date: 1965-12-17

Media Info

  • Features: Figures; Photos;
  • Pagination: p. 993-996
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00040099
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Dec 4 1994 12:00AM