A test was conducted by Electro-Motive Division, G.M.C., to measure stresses in 60- and 72-lb. rerolled rails on branch track. AAR believes that the maximum computed rail stress including impact or speed effect should be limited to 35,000 psi, for speeds of 35 mph. and less. Over 35 mph, the stress should be limited to 30,000 psi. For 72-lb. rail, the EMD diesel, had a computed rail stress of 35,000 psi, at 4 mph, so it would not seem advisable to operate this locomotive at more than 10 mph. For C, and N. W. diesel the maximum speed of 35 mph, is the limiting speed for the allowable stress of 35,000 psi. The 35 mph limit is also applicable to loaded coal car. The EMD diesel should not be operated on 60-lb rail. The C and N. W. diesel had a computed rail stress of 35,000 psi at 34 mph. The loaded coal car reached this stress at 19.5 mph, on 60-lb rail.

Media Info

  • Features: Appendices; Figures; Tables;
  • Pagination: 6 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00040040
  • Record Type: Publication
  • Report/Paper Numbers: T2252
  • Files: TRIS
  • Created Date: Jul 8 1994 12:00AM