Static effects of warped track surface in causing derailments under varying truck conditions are measured. The tests were confined to the determination of the amount of depression or super-elevation in the outside rails of curves, measured in terms of track warp in a distance equal to that between the truck centers, required to cause derailment of a box car of rigid body construction which had a total weight of 82,000 lb., and to the determination of the turning resistance of trucks under various conditions. The results of the tests are shown in the table. They indicate that center plate resistance is not the major factor in the resistance to turning, which must be overcome by rail pressure at the flange, under the truck conditions prevailing when such turning is normally required. The flange pressure required to turn the truck on level track ranges approximately from 600 to 1,000 lb. with center plates greased. Forces greater than these are the result of side-bearing friction caused by the tilting of the center plate in the bearing as the side bearings on one side of the truck are brought into contact. The results do not indicate that the presence of graphite or grease on these center bearings had any consistent influence on total truck resistance under track conditions which bring the side bearings into action.

  • Availability:
  • Corporate Authors:

    Simmons-Boardman Publishing Corporation

    P.O. Box 350
    Bristol, CT  United States  06010
  • Publication Date: 1928-10-27

Media Info

  • Features: Photos; Tables;
  • Pagination: p. 798-800
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00040157
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jul 8 1994 12:00AM