Optical Illusion using Magnetic Bearings / Fibonacci Blades
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Opposing magnets act as a low friction bearing, allowing the fan to spin using a fan on the Fibonacci curved Blades.
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The 1-Cylinder-Bades Assembly and 2-bottom are separated from the 3-base using two opposing 150 pound magnets. Lower rated magnets, such as 50 or 100 pound magnets probably could be used. Don't allow children to play with these strong magnets. The rotating assembly is retained with a 3 mm diameter rod. I used a stainless rod, but would likely use an aluminum rod in the future. The SS rod had some magnetic attraction. The 4-rings are super-glued to the 1-Cylinder-Blades. Hold the two together for a minutes and the glue is more than adequate. There is a flat surface on one ring to facilitate gluing.
The blades are based on a Fibonacci curve. The blades will turn in a wind from any direction. I use the fan to be able to control the speed.
The two rings provide an interesting optical illusion. They are seen to nutate (wobble) upon each other.
To print the rings, I’ve laid one flat and provided tree supports for the other.
I had a couple failures trying to print the rings with the blades, so I separated the rings.
The magnet holders have three 1 mm retainers that prevent the magnet from falling out. Super glue is optional for retaining the magnets.
Amazon orders:
Magnets: LOVIMAG Magnets, Neodymium, 150 #, center hole, 6 pieces, $9.99
Al Rods: Joy Tube 3 mm diameter, Aluminum, 10 pieces, $9.99