http://www.engineersedge.com/spring_torsion_calc.htmhttp://www.engineersedge.com/spring_torsion_calc.htm

http://en.wikipedia.org/wiki/Spring_(device)http://en.wikipedia.org/wiki/Spring_(device)

http://www.docfizzix.com/pdf-files/activity.pdfhttp://www.docfizzix.com/pdf-files/activity.pdf

I hope that one or all of the links will help.

(Message edited by woody on November 27, 200