-- to my regular model railroad interests.
I assume that TT gauge (1:120) would be a viable Sn30" for S Scale ...
... and that Z-gauge track (1:220) would make (at 16.5 scale inches) a viable minimal gauge (15" gauge) in S scale.
Also >>> Is O-gauge track a viable 30" gauge for LGB (1:22 scale) sized equipment?
Can anyone steer me in the right direction to get started?
Wha matters is the gauge of the track, not its nominal scale for standard gauge. TT track is 12 mm wide, 12 by 64 (S scale) gives 768mm - or about 30.2 inches. Z track is 6.5mm and thus represents 416mm in S scale, 416mm is about 16.4 inches.
O gauge track is 32mm, so in 1:22.5 scale it represents 720mm or about 28 and 1/3 inches.
I hope this helps
Hamish
Glad you're still around, Hamish -- it's been a while since I posted -- a couple of years.
I suppose, however, that the size rails and ties must be to scale, however. Narrow gauge isn't just scaled down standard track. But you gave the precise measurements I was seeking -- thanks.
Further, HOn3 track gauge is 10.5 mm, or 671mm in S. This comes to 26.4" track guage, which some modelers have used for Sn2 modeling.