Tests under laboratory conditions to determine the effect of warped track surface as a cause of derailment of freight cars and the flange pressure required to turn the trucks under freight cars have led to certain conclusions contrary to the accepted beliefs of many competent engineers and railroad officers. Among the definite conclusions indicated by these tests may be mentioned the following: That a rigid and a flexible track are equally effective in resisting a tendency to derailment caused by warped track surface; that center-plate resistance plays little part in the total resistance which must be overcome in turning trucks on curves, and that grease lubrication of center plates has no appreciable effect on truck turning resistance. It is interesting to note that, in general derailment occurred with less depression than super elevation of the outer rail. In general, it is evident that side-bearing clearance is the most important single factor, so far as the car is concerned, affecting derailments caused by warped track surface, and it is evident that flexibility of car structures plays no small part in keeping cars on the track where side-bearing clearance is small or altogether absent.

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  • Corporate Authors:

    Simmons-Boardman Publishing Corporation

    30 Church Street
    New York, NY  United States  10007
  • Publication Date: 1928-10-27

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Filing Info

  • Accession Number: 00039988
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jul 8 1994 12:00AM