They don't have to be made of fiberglass, think before saying something like that
Discussion
without fibrerglass they would be even less "efficient"
You have no reasoning for this just like you had no reasoning for pretending you've never seen a metal one, you're just typing insane bullshit and doing less than zero critical thinking, and you're doing it in my thread which wastes my time
Keep your windmills, I dont buy them, sell them to other idiots