Here's one, boys & girls: I have to duplicate a piece for a
friend. It's as if you'd taken a lengthwise section from a
hollowed-out cylinder -- like a short section of rain gutter, I
guess, if that makes sense. Is there some simple way to find out
the radius of curvature of this thing? I can eyeball it and get
close, but how would I get an exact figure?
That's question one. The second is like unto it, sort of.
Picture a collet, tubular for most of its length and then flared
at the end. Assuming that the flared part is too short for me to
get a bevel in there (I'm thinking like a carpneter's bevel and
assuming that machinists use a similar kind of thing), how would
you measure the included angle? Once again, I can get close
without doing anything unusual; but how would I find the exact
I lost a button hole.