I recently acquired a Lionel 8702 Southern Crescent Limited Locomotive. I am trying to get familiar with it. It is a 4-6-4.
I noticed that the middle driving wheel diameter is slightly smaller (1.338") than the diameters of the forward and trailing driving wheels (1.392"). When the locomotive sits on the track, there is a noticeable gap where you can see that there is no contact. See the photo below.
Is this by design or am I missing something?
Mossback
