ON3 vs ON30 - Check my math

jonnyspeedOGR Forum Member

So ON3 is correct for a 3' (36") gauge railroad right? And ON30 would technically be correct for 30" gauge, but is often used with a little modelers license and companies like Bachmann and MMI offer western 3' gauge equipment gauged for ON30 right?

I come up with the difference in gauge between ON3 and ON30 being only 0.125". With MMI making most of their product in ON3 and ON30 and Bachmann only doing ON30, I have to ask myself if that extra 0.125" gauge is really worth it vs. the increased product availability of going to ON30?

My math:

36"(ON3) / 48(O scale) = 0.75"

30"(ON30) / 48(O scale) = 0.625"

Difference of 0.125"

I haven't seen the two side by side and that's why I ask. Since I would be using Fast Tracks jigs to hand lay the track it doesn't matter which I chose, but there seems to be more product in ON30.

Thoughts?

1/30/1312:58 PM

Original Post

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