Dewman51 posted:Besides the number of rails what is the difference between 2 rail and 3 rail systems?
The electrical power for 3-Rail trains is 18 to 20 Volts AC, while 2-Rail O-Scale is DC, just like your HO 2-Rail.
Will a 2 rail freight car run on 3 rail track?
Yes, if the track is more "scale-like" T section rails and good quality turnouts. Our 3-Rail Scale layout was all Atlas solid nickel silver 3-Rail track with broad curves, and we had LOTS of 2-Rail Scale freight cars. All locomotives and rolling stock were up-graded to Kadee couplers.
What about a 2 rail engine on 3 rail track?
Sort of, yes. MTH offers many 2-Rail Scale diesels and steam models that are fairly easily converted from 2-Rail back to 3-Rail with the center rail power pick-up rollers.
I am still kind of new to this -- was HO for many years but now that I am older O scale is much easier to work with!! Thanks