[zrop]

Btw, just to clear some stuff up, we plan on having two of these prop and motor systems, hooked up together with like a car driving system. Seeing as how Max power of the CIM motors occur at 2671 RPM, the RPMs on the prop would be 3.5 times that. I'd guess that been the minimum, so the RPMs would range from the max power RPMs(2671) to the free load RPMs (5342), resulting in the prop RPMs ranging from 8348.5 to 18697. But due to imperfections such as friction and air resistance, it's pretty much guaranteed that it won't be spinning nearly as fast as the free load speed.
Oh and final, there will be a steel wire safety housing around each prop. =D