Designing a windmill

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Homework Statement

I need to design a windmill in a competition that can produce the maximum power given every participant has the same gears and dynamo. so basically we have to concentrate on the blade's design. What is the best design and its orientation on the rotor. Also what type of material should be useful to make such blade. the windmill will be tested with a table fan.

Homework Equations

The Attempt at a Solution

I m thinking of using PVC pipes to make the foil. For the shape and orientation I m quite blur.

 

[AJ Bentley]

I would take a careful look at the design of modern wind turbines.