Quote from: Omega_0 on October 16, 2009, 03:42:25 PM
I find the CD glued on a PC fan a very good setup. PC fan rotates freely and has no inertia of its own. And you can bolt it down on anything if the magnets are too strong ...

As an added benefit, you can even use the PC fan to extract energy from a magnet motor! (Perhaps something like http://www.overunity.com/index.php?topic=6829.0 could boost the motor?)

Here is what I am using to test his idea with...

http://www.youtube.com/watch?v=R-5K41HPZsY

Nice testing carbonc

Nice! I seem to remember Roney also uses a repelling magnet at the end of the runway? But you have a nice caroussel there for sure. Once you get it to work, be sure to add festive bells and colored paper.

this is cool!