Remix of simple wind turbine from "wilson124". Original model was too massive and printing time was unacceptable for me, so I break it on parts. 

You will need three vanes and a base. Print the vanes back side down with supports. I made it with 20% gyroid infill in PETG - worked fine. Fit with the base is tight, feel free to use some force to put it in place. 

Base has the hole on the bottom for 626 bearing and 10 mm hollow, so you can put a shaft a little deeper than the thickness of the bearing.