http://www.meccano.us/differential_a..._da/index.html

....Now, if only I could find that one done with Lego robotics parts
that popped up a few years back.

OM

--

"No ******* ever won a war by dying for | http://www.io.com/~o_m
his country. He won it by making the other | Sergeant-At-Arms
poor dumb ******* die for his country." | Human O-Ring Society

- General George S. Patton, Jr