What is a “Vertical-Axis” wind turbine, or “VAWT”?
The vast majority of wind turbines are three-bladed, propeller-shaped devices that spin around an axis that is parallel or horizontal to the ground. These are called horizontal-axis wind turbines, or HAWTs. An alternative system configuration features a rotor that revolves around an axis that is perpendicular or vertical to the ground, similar to a barbershop pole or corkscrew. For more information, see: http://www.awea.org/faq/vawt.
The vast majority of wind turbines are three-bladed, propeller-shaped devices that spin around an axis that is parallel or horizontal to the ground. These are called horizontal-axis wind turbines, or HAWTs. An alternative system configuration features a rotor that revolves around an axis that is perpendicular or vertical to the ground, similar to a barbershop pole or corkscrew.