Thanks guys. I figured it was the surface area inside the case, just wondering how you went about calculating it. I'm anxiously awaiting release of Ken's book so I can get edjumacated beyond my intelligence <img src="/ubbthreads/images/graemlins/grin.gif" alt="" />
Another queston, which would have a higher force, say the inside measurement was .375" diameter, flat surface, or if the surface was shaped in a semi-hemispherical, .375" diameter, with the height of the crown being .050". My line of thinking is that you would have to concider the force vector on the curved surface, total force would be lower than on a flat surface. It's been too long since my math courses.
Last edited by AJ300MAG; 02/21/04.