The USSR Railroad collected data on car rolling characteristics on two hump yards. Results are expressed in W - Kilograms/Ton resistance and were analyzed in the following groupings: by car weight; by speed of cars; by type of car; by ambient temperature; by weather conditions; for wind velocity. Table I gives effect of wind on rolling resistance for various kinds of cars. The larger discrepancy in flat cars is explained by the varieties of loads carried that would affect frontal area. The tests established that the effect of weather on rolling resistance is not significant. Since variations due to wind and weather were small, these variables were eliminated in development of distribution curves and evaluation of the other variables. By use of statistical methods a mean value and standard deviations were calculated, extreme values eliminated, and a new mean determined. Fig. 1 gives a distribution curve for both yards studied during the summer months. The major number of cars have an average rolling resistance value.

  • Corporate Authors:

    Railroad Transport Editorial Board

    3a Sadovaya-Chernogryazskaya
    Moscow-174,   USSR 

    Railroad Transport Editorial Board

    3 a Sadovaya-Chernogryazskaya
    Moscow-174,   USSR 
  • Publication Date: 1967

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 21-24
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00040070
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jan 22 1976 12:00AM