• Spin the ball (filled with water) on the turntable for 2 minutes at 400 RPM.
  • Turn the rotator off and carefully lift the ball off the turntable (ball weighs ~9 kg).

        (tighten well nut 2 revolutions minimum)
        (clamp rotator to table)

  • With one hand under the ball, slip the hook onto the loop.  Slowly lower the ball until it is supported by the cord.
  • Make sure the ball is still.  Then, after you let go, it will "mysteriously" begin to rotate in the same direction as before.
  • Demo 1Q30.39 - Transfer of Angular Momentum in a Fluid, shows what is happening inside the ball.

  • Closeup of rotator control panel.

        (explain function of RPM/rev button)