Quite simple of a question: For the purposes of a competition, I need to design/create a propeller with the greatest capacity for producing power. For the sake of standardization, all propellers must be made from a CD. Of course, since this is a competition I cannot ask for help on the propeller itself. However, I was wondering what would be the best way to measure the power of these CD-based propellers for testing. What should I take into consideration when purchasing a DC motor for this purpose - would things like torque or rpm have much of an impact? As I understand it, I can just connect a DC motor with a load resistor in a circuit, and use a volt meter to measure the power somewhere in the circuit. Also, any tips on actually attaching a CD to a DC motor? Thanks.