I promise you it is easier then you think. I will even provide you with a pdf drawing that you can print out, and use as a template. So I want everyone to start making wind turbine blades. Well, what are you waiting for, GO!
If you are interested in how to design your own go here:
By the way, after you make these you need to make a hub, but that is easy too. And make or buy a motor, but you can get them cheap on Ebay. Just type in PMG (Permanent Magnet Generator). They are nice because they do not require a gear box because they operate at relatively low RPM (500 RPM for this blade).
Step 1: Printing the Airfoil Templates (on paper)
I Also attached it to this step.
This drawing is 1:1. Yes, 1:1. Which means, all you have to do is print it out, probably in sections if you don't have a plotter. Which most people don't. But you can easily select different regions of the drawing to print, and then print them. Be sure you don't have any scaling on, as this will change the size of the print out to fit the paper, you don't want to change the size.
As you can see from the drawing below that each section corresponds with a given station along the blade. When you start carving it is critical that you mark the blade sections and their corresponding station (ie. A-A, B-B, C-C etc) So when you start carving you know which section goes to which station