NEW R&D FOR TRAIN DYNAMICS

DERAILMENTS COST THE U.S. RAILROADS ABOUT $200 MILLION ANNUALLY, WHILE LOSS AND DAMAGE OF FREIGHT COST THE SAME. TOGETHER, THE COSTS EXCEED THE NET INCOME OF ALL CLASS I RAILROADS IN 1971. THE ASSOCIATION OF AMERICAN RAILROADS (AAR) HAS CONTRACTED WITH SOUTHERN PACIFIC TRANSPORTATION COMPANY TO DESIGN A NATIONAL TRAIN--TRACK DYNAMICS RESEARCH PROGRAM. AT A RECENT AAR MEETING THAT CONSIDERED THE PROBLEM, THREE MAIN TYPES OF DERAILMENT CAUSES WERE DISCUSSED: WHEEL LIFT, RAIL ROLLOVER, AND WHEEL CLIMB. LESSER ATTENTION WAS GIVEN TO LATERAL TRACK SHIFT. ALL OF THESE CAUSES CAN RESULT FROM LATERAL FORCES ACTING ON THE CAR OR LOCOMOTIVE TRUCKS. TO A LARGE EXTENT THE INCREASING FREQUENCY OF DERAILMENT CAN BE TRACED TO COMPETITION WITH OTHER MODES, LEADING TO THE USE OF LONG PIGGYBACK CARS, TOP- HEAVY HOPPERS, GONDOLAS, AND BOXCARS, SUPER TANKCARS, AND FREIGHT TRAINS THAT ARE HEAVIER, LONGER, AND FASTER. TYPICAL HAZARDS AND THE RESULTS OF RESEARCH, TO DATE, ARE REPORTED.

Media Info

  • Features: Figures;
  • Pagination: p. 46-9
  • Serial:
    • Modern Railroads
    • Volume: 27
    • Issue Number: 3
    • Publisher: K-III Press, Incorporated
    • ISSN: 0736-2064

Subject/Index Terms

Filing Info

  • Accession Number: 00241673
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Apr 23 1972 12:00AM