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[quote user="fredswain"] There may have been no animosity meant. For some reason it just rubbed me wrong. No harm done. We're all friends here.According even to the links I provided, wheel diameter is a factor when determining TE. Am I reading something wrong?[/quote]It appears to me that you could arrive at TE by two different routes.  One would be by the formula using rail horsepower and speed.  The other would be by the formulas using the thrust force of steam or the torque force of the traction motor.  In the first method, wheel diameter does not play a role, but in the second method, it does.  With the second method, you would not need to know the rail horsepower or any other measure of horsepower.
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