Large propeller for a plastic pipe wind generator

Free energy has always attracted inventive people. If the issue with the generator and other electrics is resolved, then it remains to make a large screw. Plastic sewer pipe is a cheap and shaped material for making blades. A correctly marked pipe can become the donor of the three necessary elements for the propeller.

If you like the idea, you can implement it without an electrical part, for example, making a weather vane.