@Rod Stewart posted:I have found most Lionel big steam will operate on at least one curve diameter less than specced. Just my experience. YMMV.
Two notable exceptions are the EM-1 and the VL Bigboy. Both are rated for 072, and that is for sure the minimum.
Rod
They will usually run on one diameter less than rated, if there are no switches. Throw in a switch and that goes out the window.