It's getting so you need a decoder ring to figure out UP's model designations. Thanks for the translation.
IIRC, UP is using the 45 designation for the Evo's because some or all of the AC4400CW's are classed C44ACCTE. Hence, the 4400 HP Evo is classed as a C45ACCTE instead of being put in the same group with the AC4400's.
The actual reason per Erie PA GE people is that the engine makes a total of 4500HP but they (GE) says they give 100HP to run the auxilliary. And they do. When we load test them they make 4500HP. So in reality UP is correct but obviously UP should go by the GE model number.
By GE's theroy, the AC4400 would also be a C45ACCTE. I too have load tested engines (I was orignally in mechanical...), and seen the gross HP in N8 on a -9 or AC4400 reach 4480~4500 HP. Like you said, the engine is rated for 4500 HP, but loses 100 HP for the auxillary load, making the total available traction HP 4400.
I had a -9 a few weeks back that was smoking like a steam engine, when I began looking around, the computer said it was rated at 450 hp. Needless to say, it had some issues!
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