Last Updated April 12, 2011 |
|
Comments
A word about the current P:64 standards. The Standards listed below (current as of the date listed) use an engineering allowance called FIT with any scale less than 1:56.
Proto:Scale | Ratio | Gage | Fit | Slide | |||||||||||
Results: | Proto:64 | 64.00 | Standard | 0.001 | 0.002 | TR-1-2005 | 6/2/2007 | ||||||||
Select: | 56.5 | Variance | See TN-1.1.2 for formula explanations | ||||||||||||
S-3.1 TRACK | G | C | S | F | F | H | P | R * | |||||||
Name of Scale | Track Gage | Check Gage | Span | Flangeway Frog | Flangeway Guard | Flange Depth | Switchpoint Spread | Railhead Radius | |||||||
Min | Max | Min | Max | Min | Max | Min | Max | Nominal | Min | Max | Min | Max | |||
Proto:64 | Inch | 0.883 | 0.902 | 0.851 | 0.853 | 0.814 | 0.823 | 0.028 | 0.030 | 0.031 | 0.020 | 0.809 | 0.006 | 0.009 | |
mm | 22.43 | 22.91 | 21.62 | 21.67 | 20.68 | 20.90 | 0.71 | 0.76 | 0.79 | 0.51 | 20.55 | 0.15 | 0.23 | ||
S-4.1 WHEELS | K | B | N | T | D | ||||||||||
Name of Scale | Wheel Check Gage | Back to Back | Wheel Width | Flange Width | Flange Depth | WHEEL GAGE | |||||||||
Min | Max | Min | Max | Min | Max | Min | Max | Min | Max | Min | Max | ||||
Proto:64 | Inch | 0.844 | 0.849 | 0.825 | 0.834 | 0.087 | 0.092 | 0.017 | 0.019 | 0.018 | 0.020 | 0.859 | 0.872 | ||
mm | 21.44 | 21.56 | 20.96 | 21.18 | 2.21 | 2.34 | 0.43 | 0.48 | 0.46 | 0.51 | 21.82 | 22.15 | |||
If you have
questions or comments about this site, |