Quote:
Originally Posted by yorkie_chris
What's to make them collect at the light spot? I can't think of any physical reason.
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I'm not going to hurt my brain trying to figure out the physics of it. But if you spun a shaft with two rotor blades on it, and there is enough friction between the blade and the shaft for them to start spinning too, but they are still free to rotate on the shaft.
Then and put an equal weight on one end of each rotor blade, and spun the shaft, would the blades not start to spin on the shaft in equilibrium with the two weights staying opposite each other? It's the least resistance way for them to spin.
Are these balancing weights not just doing the same? They are free to move so they naturally find the place in the wheel and come to rest where they need to move the least?