Radius of curves.

[cam777]

How does one go about measuring a particular curves' radius?

[ABC]

Connect for example 90, 180, or 360 degrees of track and measure the distance to the center of the circle from the midpoint of the track.

[the Bach-man]

Dear Cam,
Do you mean an installed curve?
I'd use a string and a ruler.
Have fun!
the Bach-man

[cam777]

Dear Cam,
Do you mean an installed curve?
I'd use a string and a ruler.
Have fun!
the Bach-man

Yes. It is for installed curves.  I read that some Locomotives that I was interested in purchasing recommend a minimum 19 inch radius.

[mhampton]

You could also make some templates of various radii out of cardboard and compare them to the existing curves.