--Oz-- said:I am trying to spin a object as fast as I can for cheap (under $30).
Videos and details here:
https://www.rcgroups.com/forums/showthread.php?3259449-1-000-000-RPM-motors
markz said:Magnetism is the best method, no friction from surfaces touching each other, would benefit greatly!
Also how would you even measure that kind of RPM?
Punx0r said:Is there any way of driving a solid steel ball bearing with reluctance torque? If not you could spin it with a jet of compressed air
Industrial motors can spin at a head-spinning 250,000 revolutions per minute. But a new matchbook-sized motor runs circles around the competition.
Researchers from ETH Zurich's Department of Power Electronics created a drive system in cooperation with its industrial partners that exceeded 1,000,000 rpm in tests.
how fast 600 million revolutions per minute is.
Because that's exactly the rotational speed scientists at Scotland's University of St. Andrews achieved with a man-made microscopic sphere of calcium carbonate basically for the sole purpose of observing what would happen at such a speed. The results were published in Nature Communications on Wednesday.
Punx0r said:Not sure to be honest. I recall a small defunct wind tunnel where I used to work that was mach 3 or 4 powered by compressed air in the thousands of psi range.
Punx0r said:Hold on, any chance you could sufficiently magnetise a solid steel ball to use? I'm guessing it doesn't have to be a strong magnet to work?