CSSHEGEWISCH wrote:Adhesion also seems to be a problem at this level, so 6000 HP may just be too big.
I've also heard that the railroads prefer to have lower-horsepower locos in a consist because if one craps out, the train can still move.
i.e. If a train with two 6000hp locos suffers a failure with one of the engines, the train will most likely be stalled (50% of the pulling power gone). But if it has three 4400hp locos and one conks out, it can at least keep moving, albeit a lot slower (lost 33% of the pulling power).