Thanks for the ideas so far!
It looks like the sketch didn't attach the first time, I am attempting to reattach it.http://files.engineering.com/getfile.aspx?folder=05e61dbb-b14c-4582-888c-b85be53eb82e&file=torsion_spring_sketch.bmp
I am designing a mechanism with a torsion spring on each side of a base that work together to hold an arm down. Each spring is warped around a 0.7" boss. The arm is 17" long. I am trying to get 10-lbs of force at the tip of the arm when it is opened out 135 degrees. I have attached a sketch of...
