Originally Posted by
Scrapette
Don't know - that's why I posted it! If I understood physics I'd be at NASA.
To make this demonstration more confusing he could have also removed the rotor which is this case is actually a stator - fixed position. The fan would still have turned after installing the hard drive magnets.
Inside the Fan there is a circular magnet comprising of north and south poles in a continuous manner, when he installed the hard drive magnets they were arranged so that opposing corners of the fan housing were north pole while the other pair were south.
Since north and south poles repel each other he could make the fan turn.
Permanant magnets are fun to play with, especially since the discovery of rare earth magnets.
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