“Using specially manufactured 16.5 mm (0.65 in) gauge track, scaled at 7 mm to the foot (with appropriately spaced, larger Railroad Tie underneath – United States O scale rolling stock (1:48), it becomes a narrow-gauge track of 2 ft 6 in (762 mm), and is referred to as “On 2½” (or On30, as in 30 inches).” 1Wikipedia – O scaleThis is based on HO track. If you run the numbers, that 16.5 mm (0.65 in) gauge track actually comes out to a 31.18 in (792 mm). Since there was a real world 30 in gauge track we simply call this On30 .. rather than On31. |
NMRA S-7 Clearances
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ON30
Will this work with Bachmann On30? Have not idea – they may need to use the On3 gauge – will check at some point. |
On30 Gauge
I cranked off this gauge .. call it version 1. |