Joe
The diagram is not a single siding which is what I think the original poster wanted,it is rather of 2 sidings on a loop,not one and simply runs 2 trains point to point using 3 points and relying on the anti derail feature of the turnouts.. The problem with this arrangement,although it works is the lack of realism,as it will perform very mechanical. As soon as one train pulls in,the other one will jackrabbit out at full speed. Also the wheels carry current for the other train and operation can be erratic. The advantage of relays is that it can be made to perform smoothly with a time delay on one single passing siding,the trains need not run point to point, rather when 2 trains share a single siding,the one that was there first will leave.. A soft start circuit can be made with additional relays where after one train stops the other,after a time delay pulls out slowly and accelerates gradually..
Not knocking the diagrams they work as drawn but this method will not work for 2 points on only one siding. It would need 3 points and be tedious in operation.
Dale H
