Windmills

A Windmill is a machine which converts the energy of wind motion by means of adjustable vanes called sails. Windmills have been used for hundreds and hundreds of years, it’s been stated the first windmill appeared in the 9th Century. Since the Windmill was design the only major change was the shape of the building everything else has stayed the same (e.g. the sails, m . Ever since the windmill was designed it’s been used for the same thing it’s always been used to create power. The main purpose of Windmills today is still to create power. Although now they are not used anymore to power the machines inside, the power that it creates is now being put back into the electricity grid.