Now that I'm retired and in a new place, I've been furiously designing [again] for a 10x20+ third garage bay. The minimum radius is 42" (O-84) but I'm tinkering around with the idea of going to 48" radius (O-96). The largest locomotive I have with scale wheels is an MTH Big Boy 4014 and it can make it around 36" radius (O-72) but doesn't look right. And, yes, it has a street run.
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