I like this build, not so sure why screws in the pipe, but its nice simple build that you could do with kids for fun and does something visible (pumps water).
http://www.instructables.com/id/DIY-Wind-Powered-Water-Pump/
I like this build, not so sure why screws in the pipe, but its nice simple build that you could do with kids for fun and does something visible (pumps water).
http://www.instructables.com/id/DIY-Wind-Powered-Water-Pump/