Optical Illusion - Rotating Rings with Paddles
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I added paddles to the previous Rotating Rings, so that blowing on the paddles turns the device.
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Model information
- Source
- Printables
- Category
- Winter & Christmas & New Year's
- License
- Creative Commons — Public Domain
This optical illusion makes the brain perceive the rings rotate upon each other (nutate) when turned with your finger.
I added the paddles to the original design. The paddles allow the device to turn with a puff of air.
I first saw this (motor driven) on Dave Garroway's TV Morning Show a few decades past.
The center column is designed for holding by hand or hanging on the Christmas tree. The bearing is a light press-fit into the ring.
The blades are press fit.
The bearing is 22 x 8 x 7 mm tall. They cost $5 for 10 pieces from Amazon.