On Jul 7, 4:07*pm, riverman wrote:
On Jul 7, 11:44*pm, BJ Conner wrote:

I had to go back and thing about a sections of RR track- one 100' long
and one 101' . * *The units of change are in/in/degree IF you bend
them into circles the circumference of the bigger circle grows more
and the radius becomes greater.

Is this so that you can have parallel tracks in a turn with the end of
each rail in alignment? And if the ends abut the next set of rails,
then the expansion on each track is such that they remain an equal
distance apart (the width of the train wheels)?

--riverman

Spikes, ties and fishplates take care of that.