[Ether]

Originally Posted by androb4

He's referring to the cam they used to power their kicker.

I've heard it called a da vici cam.. Like this.

http://img.rlt.com/x/12131.jpg

One nice feature of a cam is that, with a little math, you can derive the equation for the spiral so that the torque required to drive it remains constant as it is pulling back the arm. Then you can use that equation to cut out the cam.