This interim report is a supplement to a previous report and documents the results of the second portion of an investigation of the train resistance phenomenon. This portion of the effort was specifically directed toward determination of possible fuel savings to be effected through certain design improvements or equipment modifications when a freight train is operated over normal track, including grades and curves. The results of 52 simulated runs of various freight trains over various tracks, both real and artificial, are reported. The simulations show that fuel savings are not directly proportional to reductions in train resistance and that under certain circumstances only a portion of the theoretically attainable fuel savings can be achieved. It is also shown that fuel savings attributable to certain of these modifications are quite dependent upon the nature of the operation in which they are used. Within limits, the computer program developed during this study can be used to determine the fuel consumption of an arbitrary train operated over an arbitrary track to perform sensitivity analyses with respect to locomotive assignment policy, operational speed limit, and the like, and to determine the effect of design improvements or equipment modifications upon fuel consumption under normal operating conditions. The computer program which performs the calculation is explained in detail and the rationale behind its development is given. An example of the results from a separate plotting routine, which plots from the data generated a velocity profile on which is superimposed the instantaneous fuel consumption rate, is given. Complete information on trains and tracks used to generate the material for the report is given in an appendix.

  • Record URL:
  • Supplemental Notes:
    • See also FRA/ORD-78/04.I, Volume I,--Methodology and Evaluation, published April 1978, and FRA/ORD-78/04.III, Volume III,--Sensitivity and Computer Program, to be published Summer, 1980.
  • Corporate Authors:

    Mitre Corporation

    1820 Dolley Madison Boulevard
    McLean, VA  United States  22102

    Federal Railroad Administration

    Office of Research and Development, 1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
  • Publication Date: 1979-4

Media Info

  • Features: Appendices; Figures; References; Tables;
  • Pagination: 164 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00308269
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: FRA/ORD-78/04.II Intrm Rpt., MTR-79W00010
  • Contract Numbers: DOT-FR-54090
  • Files: TRIS, USDOT
  • Created Date: Feb 11 1980 12:00AM