On Feb 4, 5:02*pm, "EXT" wrote:
Your "model" train diagram shows three rails (one in the middle) and 1 1/4"
spacing between the outside rails, most dedicated modellers would classify
this train as a toy train as it does not approach scale modeling in any
aspect.

Actually, O-Guage 3-rail system is much more popular than the two
track O-Guage systems. It's been around since the thirties. It
allows the train to do a reverse loop (this was back before processors
were in everything, but it's stuck). For me, it the third track is
not an issue as it is mounted to high to be seen. For this particular
application, the three track system is better because it can take any
O-Gauge train, wheras the two track systems can only take trains
designed for two track systems. Two track trains tend to not be able
to negotiate as tight corners either, often having minimum turning
radii of 32" or more, which is not very practical for a cieling
mounted train. I actually did a bit of research on this very subject
before I built my set.

The 1 1/4" is actually pretty close to the 1.17" that an actual 1:48
scale track should be. Apperently, in Europe, O-Guage is 1:45, which
brings the track width even closer.

John