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Without knowing what the average speed is for this project, my assumption is that 5,000-8,000 rpm would not be feasible since I think it would simply shake itself apart! It's not a very sturdy construction, after all. You could experiment with a few things to try to get the speed you wanted, including adding more battery power, using a stronger magnet to create a larger field, and adjusting the number of coils (remember: each extra loop of wire also adds more weight that has to move!)Let us know if you discover some good tips to make it go faster, or work better!
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