@Matt, thanks, I may have to do that. I was told that I should double check with MTH and see if the center 2 drivers on that engine are blind and if they are they might work on something tighter than 31" but, probably not 24". I will measure the bolsters, that is a really good tip.
Thanks,
Chris
A hi-rail mth steam locomotive with "Proto 3/2" configuration will negotiate 36" radius Atlas 2-rail track. The hi-rail flanges are cut a little smaller and don't hit the tie "spikes". I used to run my hi-rail ATSF Hudson on 2-rail track at demos. The scale-wheeled MTH steam have flanges on all drivers, but the aforementioned ATSF Hudsons will do 36" radius (I have a scale-wheeled Blue Goose and it does just fine on 36" radius). A larger 8-driver steam locomotive won't be able to pull it off, but the odd exception is the Big Boy. Mike Pitogo tried it on a whim and the locomotive goes through 36" radius because of the smaller drivers, shorter driver wheelbase and the articulation of the frame. The Mikado's might also work, but I don't have any reports from owners about that.
