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I am going to say that there are many good points for both engines. However I post a link here to help look at it from the Alley's point of view. It will save having a mass of large sheets on this forum. http://www.steamlocomotive.com/allegheny/ Keep in mind that the vicious grades never gave the Alley room to run. In fact she is capable of more horse power at the drawbar than the Big Boy at 40 Mph. I could understand this to mean from a power point of view all things equal, the big boy will not be able to keep up with the Alley. In a 200 mile run on the same track same loads etc I think the Alley would be first in. It is unfortunate that such a demonstration was never done.
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