I know that On30" track is nominally the same physical dimension between the rails as HO standard.
Is Sn3' also the same inside the rails dimension as HO?
Is Sn2 the same inside the rails dimension as N?
TIA>
Scale relationships question-- Duuuh/
May 23, 2006
4 Replies
Jim McLaughlin spake thus:
Close (correct: "nominally"):
- HO standard = 4'8" / 87.1 = 0.64"
- On30" = 30" / 48 = 0.62"
No, because the "n3" part means "3' in the scale (1/64 in this case):
- Sn3 = 36 / 64 = 0.56" (close, but no cigar)
- Sn2 = 24" / 64 = 0.375
- N = 4'8" / 160 = 0.35"
No. HO track is widely used in Australia and New Zealand to represent
3'6", or 42" gauge track - Sn31/2.
Jim McLaughlin had it right the first time -- the track gauge is exactly the same for HO standard and On30, as specified in NMRA Standard S-3.2 ("On30 uses the same track geometry as HO gauge track").
Reference:
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__________ Mark Mathu The Green Bay Route:
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"I started out with nothing and I still have most of it."
"HO track is widely used in Australia and New Zealand to represent
3'6", or 42" gauge track - Sn31/2."That's roughly equal to meter gauge, which is 39.37"
Speaking of N scale track. It looks like it would come out to about
22.6" which is close enough to two foot gauge for model railroading.Eric
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