How Do Grain Windmills Work? | Sciencing
Apr 24, 2017· Since ancient times, windmills have been used, primarily as a method of grinding grain into flour by using the power of the wind. The original windmills, used in Persia in the 9th century, were verticalaxis mills, but modern windmills use a horizontal axis, in which the blades are fixed to a central post, which is more efficient.
