Mechanics of a windmill

Modern windmills, or turbines, use aerodynamic blades capturing wind's kinetic energy, which turns rotors attached to gear systems and generates electricity. They come in horizontal and vertical designs, with onshore and offshore installations tapping into variable wind conditions. [1] Windmills were used throughout the high medieval and early modern periods; the horizontal or panemone windmill first appeared. . A water pumping windmill is a simple machine that uses wind energy to move water. The 18 sails capture the wind, even at low wind speeds, to lift water using a piston pump. Transformers increase voltage for transmission. Windmills have served as essential power sources for centuries. [pdf]