• An easy spin of the wheel CCW unscrews the nut on the axle.  When the nut falls off, the weights are released and fly off with all the angular momentum, stopping the wheel instantly.

(Can only be done in a room with a high ceiling)
(Position the ladder so no one gets hit by a flying weight)
(Clamp base to top step of ladder with enough overhang for balls to clear side of ladder)
(Screw nut on 5 or 6 turns - not revolutions)
(Turn wheel CCW to wind cord with weights onto wheel - do both weights simultaneously so there are no crossed lines)

  • Closeup of loop attachment to nut.