27th ANNUAL WHEEL RAIL INTERACTION CONFERENCE

2022 Heavy Haul Session

Abstract:

RBM Frogs: Design Features, Field Testing & Maintenance

Brad Kerchof

Brad Kerchof
Advanced Rail Management Corp.

This presentation covers important aspects of RBM (rail-bound manganese) frogs.

  • Design features are described, including point slope, heavy point & standard point, various heel configurations, conformal & flat top profiles, and wing slope.
  • Results from joint TTCI/NS revenue service testing are presented, including a comparison of heavy point vs. standard point, rubber pads vs. none, conformal profile vs. flat top profile, the performance of various heel configurations, and the performance of longitudinal wing slopes.
  • Wheel transition between frog point and wing is illustrated for several different wheel profiles.
  • Installation instructions for heavy point frogs are given.
  • Finally, maintenance advice for welding and grinding RBM frogs is presented.