Michael Glavin said:
See my thoughts on other post. On30 on HO track scales to narrow gauge for O gauge modelling. As a comparison, O gauge rail scales to 3’ narrow gauge equipment with 1/29 scale equipment.
Michael
O Scale, 2 rail, works out to 32mm gauge and is popular to model 2-foot gauge using a 16mm-to-the-foot scale. It is quite popular in the UK for garden railways to be built to this scale/gauge as 2-foot railroads ran in many parts of England and elsewhere under colonial rule. Personally, I model the Darjeeling Himalayan Railway in 16mm scale but I don’t have any of the O Scale tracks set up outdoors (yet). So I cheat and run things on a 45mm gauge track that I use for more traditional, American prototype trains.
Interestingly, the use of 45mm gauge “G Scale” tracks to model three-foot narrow gauge (DRGW, EBT, etc) works out to being a 15mm-to-the-foot scale as 45 / 3 = 15. So the two-foot gauge modeled in 16mm- and the three-foot modeled in 15mm-to-the-foot are very, very close scales; they just use a different gauge of track.
I have dreams of running some 32mm gauge track so I can be more proper with the 2-foot-gauge trains, like the Darjeeling, but it would also mean I could get out some of my 2 Rail O Scale stuff for a little fun now and then. The ties would look strange for O Scale as they would be spaced for a narrow-gauge train of a totally different scale, but you can’t always win at everything.
Of course, all of this is moot if you want to play toy trains with O gauge three-rail stuff.