this is one of the problems with the c&0 2-6-6-6 being much heaver per axle than lima rated them at and they tore the rail apart at speed. It was so bad that they had to be limited on them and they were not that successful. get the huddleston book on them and read of all the problems the c&0 had with them and c&o won the lawsuit the had against lima. I haven't looked lately but I think they were limited to 35 mph because dynamic augument was quite bad at speed. There 2-10-4 s were a much better engine and that is what they (the c&o) should have purchased for more high power steam.
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