I was browsing streetfire.net and found this http://videos.streetfire.net/Player....43E1D136A9&p=0
I was like..."WOAH! that'* so cool!" I read through the comments a little bit and found a link to the guys site. He has links to all of the motors he'* built, sound clips and videos of them running. It'* just really cool.
Here'* his site : http://www.nvbackflow.com/engines/index.html
Go to "engines" on the side to listen to sound clips and watch video clips of the motors he'* built. He also shows where you can buy stuff to build these yourself.