Summary

Here is my take on vertical wind turbines.

you will need 2 shells. and 2 type1 or type 2 connectors. Just drill some 3mm hole in connectors and put a stick through it.

I will glue mine on an unused step motor. Maybe i generate some power. who knows?

-divided shell into two so that it can be printed without support
-added parts i use with step motor in case anyone wants to give it a try