--- In [email protected], Bill Rigsby wrote:
>
> Â Looking at these curves reminds me of a question about one rail next to
> another on the inside of each running rail so as to put pavement between the
> rails. The question is how much distance is needed the running rails, and an
> inside rail so as to allow for five axle, i.e 2-10-2 to make a minimum of 45"
> radius curve wihtout binding on either the inside, or outside driver flanges?
> Is there a standard of X distance between rails, per Y distance of curve?
It would depend on the rigid wheelbase of the loco and the radius of the
curve. I'd calculate the middle ordinate for a curve of the desired radius and
a chord as long as the loco wheelbase then use it plus the thickness of the
loco flange plus a bit of extra for error slack.
For instance a 45 inch radius would give a middle ordinate of .069 for a 5
inch wheelbase, add .035 for flange and you get .1040,times 1.1 for error gives
.1144 One eight inch is .125 so that would probably be a handy number to use.
for a 6 inch wheelbase on 45 inch curve the number is .1350, times 1.1=.1485 ,
for 7 inch wheelbase the number is .175 times 1.1=.1925 or more like 1/5 of an
inch.....DaveBranum
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