Pete M. et al --
Scale wheelsets will operate satisfactorily on any size rail. The critical
dimensions are track gauge and flangeway width. Larger rail sizes have wider
base widths, so to get the right flange width, you may have to file away some
of
the base if you install your own frogs or guard rails.
Some of us bother with different rail sizes because we want to better replicate
real railroads. Most Class 1 railroads in the US and Canada use rail that
corresponds roughly to code 100 in S. (The "code" is nothing more than the
rail
height in inches with the decimal point moved three places to the right. Thus,
code 100 rail is .100 inches high.)
Given that, rail yards and spurs are often constructed of lighter-weight rail.
Some S people use code 83, particularly in yards and spurs. Some even use code
70 in places.
Dick Karnes
[Non-text portions of this message have been removed]
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