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Dear very similar screen name [:)][:D], <br /> I have been asking for what minimum radius I should use for 4-8-4s and 4-8-2s. The answer that I have gotten is around 24". Being as the Big Boys were articulated, they had a wheel base of similar to a 4-8-2 (I think). I know for sure that the 4-8-8-4s could negotiate 20 degree curves in real life, meaning that their minimum radius should probably be only al little broader than a 4-8-4 if not smaller. I would think that you might be able to run one in maybe a 12" radius curve. I would advise you, however, to call the manufacturer, and also try it out on several radii before purchasing, if possible. If you can manage a 18" radius curve, I would say that would be safe, but I doubt you want to do that in N. <br /> <br />I hope this has helped, <br />Daniel
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