So since a certain someone who shall remain nameless has talked me into doing a run of Fn2 and it makes since with the overall feel of my railroad and adds to what I already wanted to do as an expansion; I have an idea but don’t quite know how to make it work.
So my layout has a tail on the wye that just dead ends about 18 inches past my bridge. It is going to service the ice house I built for last years challenge. No with the addition of the Fn2 (32mm track) I want to extend a piece of 32mm track into that 18" section of 45mm to make a dual gauge inner tie. I only need the dual gauge to be a section about 14" long. Just enough to service a single box car or flat car. The idea being that the 3 foot gauge can drop off and pick up supplies from the 2 foot gauge and vis versa.
Here is the problem I am having trying to figure it out. The 45mm section is straight. The 32mm will need to come in on a curve. Now I know I need a small gap at the inside intersection of the rails for the flanges to pass through. The shared or common rail will be on the left side of the straight track and curve out the right side. My question, and I am hoping I am over thinking, is how does the incoming 2 foot car align itself with the common 3 foot gauge rail. and more importantly how does it know to take the 2 foot track and not try and go straight.
Now I am assuming that the non shared rail for the two foot gauge will be what dictates that. It will force the truck to travel onto the the straight rail and then pull it off the straight rail and onto the curved rail automatically. Is there any need for any type of frog?