I have a question about the min. curve specified for for the Lionel SD-40's, stock #2033471, in particular. Spec indicates min. curve O-54.
I have a couple of these SD-40 and also a couple SD-40T's which I think are spec O-36. The main diff. I can see between the former and the latter is that the truck and coupler assemblies are separate on the SD-40, and the the coupler is integrated with the truck on the SD-40T.
When I look from the bottom of the SD-40, both the trucks and the couplers seem to pivot left or right for a wide swing. I have almost all O-60 curves, so in general, no problem. But I have an inner loop with a single half circle of O-48 as a turn-around. I have not tested, but would they really not make it around that curve radius, given the amount of pivot I can see? Thanks/Alex