#11 10-18-2010, 02:45 PM BerntR Senior Member Join Date: Feb 2005 Posts: 981 2-C-1#3 is a tiny draw. The ball takes on a side spin that equals the RPM of the horizontal hinge. You can see the ball take on a spin in all thee drawings at page 17 in the 6th edition. __________________ Best regards, Bernt BerntR View Public Profile Send a private message to BerntR Find all posts by BerntR