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Thanks Joe! This is exactly what I've been looking for. I guess in todays railroading the BP and cb and cs of the steam engine all get combined into an amperage value or horse power rating for dissels? And the value would be derated like the BP value say at 85% level again? I was suprised to see total wieght of the engine was not in the calculation at all. I thought it had more to do with the tractive effort or is that tractive force. I guess I still have some more unanswered questions related to the topic, if you know any more formulas? thanks again. James.
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