Double square pendulum

[haakondahl]

The only decent candidate I've seen for a perpetual motion machine is stupid comments on YouTube.

[ataylor0002]

eddy currents are bad, wont they stuff it up?

[518schenectady]

that could be the best perpetual motion machine ever if u made the back square out of copper and the front square was a magnet. u could also have a wall of copper in front of the thing where the squares move. u start it it makes the energy most likely more than enough to get it going again ive seen chaotic pendelums they have a lot of movement to them b4 they actually stop

[Angel07CE]

That wouldn't be a perpetual motion machine at all, eddy currents generated by the relative motion of the plates would just dampen the motion so the plates stop moving much earlier than they would normally.