[bobadame]

I'm working on a simple device that will measure chord height at a fixed chord length of 3". It's simply a dial indicator that is centered between 3 legs that have rounded ends. The tool is initially zeroed on a flat surface. When it's placed against a curved surface the dial indicator will read some distance from zero. That is the chord height. 3" is the chord length. With these 2 values the radius can be easily calculated. Also, the dial indicator will show the point at which the radius begins to change as it's slid along a surface. I'll try to have it finished by tomorrow. A picture is worth lots of words.