This is a openscad parameterized windmill propeller. I designed it to generate power through a hoover board brush less motor. The windmill is working super at wind speed 3 and above. Keep in mind that there are numerous parameters in this openscad file so fiddle around with it to discover how it works. In the invoke module section you can choose which parts you want to see, for you own stl rendering purposes. Please reuse this code, i haven't invented it all i borrowed from lots of other examples on the internet. like https://www.thingiverse.com/thing:3506692

This is work in progress, maybe i will changes this windmill some day to a twisted angle variant, but for print ability reasons i choose not to go for it. But that's probably the reason i need medium ti strong wind.