What is a three railer?
Model Rail Road O Scale (1:48) that has three rail tracks the toy train runs on, with the middle rail supplying power to train. The two out side rails are the no-load neutral. Joshua Lionel came up with the design before WWII, is uses low voltage AC current. (HO scale has two rails and run on DC current)
- The more recent two rail O Scale modeling is new and more realistic. But it has high expense and higher price tags generally, due to model wanting to be more realistic. (these are not toys..)