Thanks for posting that.
There's an elderly gentleman here who used to install and repair windchargers and pumping mills. Some are still in use. For a beer he'll give about an hour of local wind history.
![Wink ;)](https://www.fieldlines.com/Smileys/default/wink.gif)
![](http://www.otherpower.com/images/scimages/3006/lake_benton_2.gif)
This pumping mill is one he put up in about 1945 and still keeps several hundred head of cattle well hydrated. You can see a few of the Z750s in the background.