Reply to "Two rail rolling stock operated on 3- does it matter?"

B SmithOGR Forum Member

Yes, track gauge (width) is the same for both 2-rail and 3-rail when using the traditional (incorrect) rail-spacing of 1-1/4" (O gauge), which equals 5 feet in 1/48 scale. However, 2-rail wheel treads are narrower and 2-rail flanges are smaller than those used for 3-rail equipment, and they are therefore closer to scale (but still not exact). The next step is Proto:48, which employs accurate 1/48-scale wheel tread/flange measurements and correct track gauge for 1/48 scale. To put it another way, tolerances are greater for 3-rail equipment.

8/4/173:44 AM

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