[Yoda]

Thanks Yoda

Very interesting stuff. Homer would probably have a little smile on his face if he was still with us.

A shaft stress measuring device . . . would make for an interesting diagnostic tool ......... in the right instructors hands.

. . .

Homer was a true genius.

An appropriate "stress measuring device" already exists. How the clubshaft manufacturers use it -- or even if they use it -- I do not know.

I do know that Homer Kelley used it to build airplanes and to measure the stresses his finished product would have to endure in 'real time'. Did he know what he was doing? Toward the end of his career, only one signature (of tens of thousands of employees) could release a Boeing aircraft as technically fit for sale. That signature was his.

And just what is that device?

The strain gauge.

http://en.wikipedia.org/wiki/Strain_gauge