Doug Miller wrote:

Pipe don't stretch. String do.

I found out just how much string stretches last summer when laying
out a
curved sidewalk. Next
time I do a project like that, I'm using something rigid to mark my
arcs:
board, angle iron, steel
rod, something like that -- but *not* string.
---------------------------------------------
Which is why full size arcs by swinging a radius SUCKS.

There is an easier way to run the railroad.

See Fig 5-42 over on APBW.



Lew