Recommended Practice RP4
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National Association of S Gaugers, Inc.
Engineering Group

Recommended Practice RP4:   Wheels - Proto:64

Check Gauge maxmium

Kmax

0.851"                   21.62mm

Back to Back minimum

Bmin

0.824"                   20.94mm

Tire Width minimum

Nmin

0.087"                   2.21mm

Flange Depth maximum

Dmax

0.026"                   0.66mm

Notes:

  1. For further information on Track & Wheels, see NASG Standard RP3 & RP4 Help File.
  2. Recommended Wheel Contour is Association of American Railroads.
  3. Adopted by the NASG - September 1998.

  Drawn by Randy Wilson - 27 December 1995

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