I know that the original Lionel tubular 031 curved track was not measured in the conventional way from center rails, however I do not remember the actual dimensions. I have put together a couple of sample circles and come up with about 28.5 inches center to center and about 30.5 from outside of track clips. Does anyone know the exact dimensions? Also, does MTH 031 match up with the Lionel 031. Any assistance would be appreciated.
tk.
jim r
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Using a 10" "O" straight as the benchmark, track geometry rules dictate that the 0-31 curves are 14.4" radius(28.8" diameter).
Hi Rob, thanks for the info. Would you know if MTH 031 is the same or similar or is an actual 31 inch?
jim r
My understanding is that MTH copied Lionel's geometry.
Lionel, however, failed to do the same when they introduced O-31 FasTrack. It is actually 15.5" center rail radius, and is 35" overall diameter with the roadbed.
Not to be, well, a smart a**, but if you have the actual, physical track assembled, and have properly measured it, I would think that you know better than anyone else the
"actual dimensions". There they are, not subject to opinion or "authority".
I presume that the track "clips" that you mention are the metal ties, and I believe that
30.5" is pretty much "31" by the standards of tinplate. I think that JLC measured from
the outside, as he was trying to let the customer know how tidy a space into which
his compact O-gauge equipment's track would fit.
Not to be, well, a smart a**, but if you have the actual, physical track assembled, and have properly measured it, I would think that you know better than anyone else the
"actual dimensions". There they are, not subject to opinion or "authority".
I presume that the track "clips" that you mention are the metal ties, and I believe that
30.5" is pretty much "31" by the standards of tinplate. I think that JLC measured from
the outside, as he was trying to let the customer know how tidy a space into which
his compact O-gauge equipment's track would fit.
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