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**Denver Dude**Okay, we have two trains with modern locomotives. One train is grinding up a 3% grade section of Cajon Pass in full throttle with a track speed of 15 MPH.

The other train with the same power is sprinting across the Texas panhandle at 74 MPH in the 8th notch.

My thinking is that to the prime mover it's all the same. It's working at the same level in both situations. Full power is full power, no matter what the train is doing.

Is this an incorrect assumption?

The other train with the same power is sprinting across the Texas panhandle at 74 MPH in the 8th notch.

My thinking is that to the prime mover it's all the same. It's working at the same level in both situations. Full power is full power, no matter what the train is doing.

Is this an incorrect assumption?