Here's the problem... I am to build a simple windmill (small scale) to lift an x amount of weight twelve inches above the base plane. The required amount is to lift 200 grams, 12 inches in 2 minutes or less. The materials are to be mostly recycled; however, I am alotted $15 to buy any new materials needed. The windmill will be sat in front of a standard box fan to turn the mill. The basis for my idea is this: 1. An abundance of blades, with a decent amount of pitch. Material not yet known 2. To lift the weight, I will pull a small vehicle up a ramp that will eventually become 12 inches high. 3. The windmill part will turn a drive shaft. This drive shaft will be connected via belt to another drive shaft. This shaft will have a string that will wrap around it to pull the car up the ramp. What I wanted to know is... what is the basis to have a successful windmill? Is more blades or less blades good? Minimizing air unaffected going through is key right? Could anyone give me some alternative ideas that would succeed?