[SML] question for router wizards

[billn at peak.org]

> If I'm recalling my woodworking class from 40 or so years ago, you can
> easily draw an ellipse on the wood by putting a nail at each focus, then
> using a loop of string to constrain your pencil, just draw the thing.  I
> don't have a formula to calculate the length of the string, as the class
> was back in 7th grade woodshop, and we were making plaques for something.

It would be two times the length of the major axis.

The width of the minor axis is determined by the spacing between the two focii.

Bill