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[quote]QUOTE: Originally posted by Modelcar ....Now that is some serious data....! I'm with you until the next to last sentence and there I get lost. Trying to understand how the 800 HP of the "one" unit can get the traction when the required weight [for traction], is spread out say, over 3 more engines.....or something like that. Gee, smoke coming out my ears. [?] [/quote] these ideas do seem to roll around on eachother. i find it hard to keep it all in place. i hope that i have properly understood your question and that the following is of use. (the full article is at the website cited.) does it help to imagine the three engine consist spoken of here as being one very long single unit? i believe the author's point is that if TE requires more weight than four axles and their traction motors can safely transfer to the track, while still remaining within the load limit of the rail, then the locomotive is made heavier and lengthened some so that two three axle trucks can be used to spread the weight across more but less heavily loaded bearing points. should even more TE be required than six axles can bear to the rail then additional trucks are brought in by way of added locomotives. since only added bearing points are required the added weight can be as slugs whose axles and traction motors will apply the added adhesive force to develop the added TE. question: is this principle being used in the design of steam atriculated locomotives?
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