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Reply to "Tight turns"

What do you mean by 0-48 and 0-54?    Generally in 3 rail when they mention 0-xx, it means xx diameter, not radius.    e.g. 0-48 is supposed to be 24 inch radius which is very tight for 2 rail.    

In 2 rail we generally just refer to curve radius without the "o".    so 48 inch curves generally means 48 inch radius curves or 96 inch diameter for a turn back.    and I think many of us measure center line to center line.
48  inch radius by the way is a very workable curve for 2 rail.    It is sharp by some standards, but most equipment except modern long (70-80 ft) freight cars will go around it.    Also most cars can be modified on the underside to make the curve.    I have run full length Walthers pullmans on 48 inch radius.    Just keep the underside details clear of the truck swing.    It does not look the best but works.   

I think any 4 axle diesel model with easily hand 48 inch radius and sharper.   Steam engines up to medium size generally do.    I have a Pennsy USH mikado with all wheels flanged, and it will do it, but it has to be laid smoothly.    6 Axle diesels will often do it but you have to test them.   A lot of the new stuff from MTH in 2 rail probably does.   I have some Sunset E7s and they do.   

 

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