IG7 Page 26
Pinwheel (Corona Motor)
The Pinwheel experiment is the old standby experiment that demonstrates
ionic flow as well as Newton’s 3rd law of Motion: “For every action there is an
equal and opposite reaction”. When we expend ions off into the air with our
Ion Cannon, we are not only pushing air out of the ends of the pipes, but we
are also pushing the Ion Cannon in the opposite direction. Granted this force
is pretty small in our case, but the pinwheel experiment helps to demonstrate
the basic principle very well.
Copy the template (or cut it out) of the metal pinwheel and use it to cut a
piece of tin to form. Using this “rotor” will demonstrate how the ions that are
being released from the sharp tips also push back with equal force. The force
exerted back on the tips will make the rotor spin in the opposite direction of
the ion stream!.
1. Be sure to use leather gloves or even butchers’ gloves to prevent slic-
ing up your hand from the sharp metal edges when cutting our your rotor.
Blood drops can through your rotor system off balance!
2. Cut the top and bottom off of a soda can, and slice it down one side.
3. Bend out and form the aluminum so that it is flat.
4. Cut out the pinwheel diagram from the manual so you can use it as a
template to later cut the tin in a desired shape. Tape it on to the flat alumi-
num sheet.
5. Tap a nail on the center point light enough that it doesn’t go through the
metal. It should just leave a dimple that we can use to balance the rotor on
a support nail. This will form our “frictionless” bearing!
6. Using sharp scissors to cut out the template. Make sure to use bold sin-
gle slices with the scissors. Not a bunch of little slices that will leave many
sharp points and make the rotor ineffective. You can always go back and
trim off the sharp edges later.
7. Verify that the Ion Cannon is powered down and unplugged.
8. Unsolder the high voltage lead of your Ion Cannon from the nail board.
9. Using an insulated post like a hunk of plastic or small plastic soda bot-
tle, hammer a nail through the lid so that it points out the top.
10. Secure the high voltage lead to the nail, make sure the nail base is
stable.
11. Balance the rotor on top of the nail. Use small pieces of tape as
weights to balance your rotor if needed so that it stays level by itself.
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