There are also numerous devices that work with pulses to speed up a wheel.
Some use 2 circles of magnets with 1 less on the wheel as on the ring around. This allows for a large range of pulses to try out. http://video.google.com/videoplay?docid=3496956186892095206http://video.google.com/videoplay?docid=7914711626037688624
This is the only way to research such topic, build build build and build. It should be easy to build 1 different device per day. Maybe buy a patent? Failure is not important, just keep going. Think of the $ the £ the ¥ and the € to be earned after all the fun. lol