Abstract: Multiple vertical-axis wind-turbines are aligned in a geometric array relative to a horizontal-axis wind-turbine. The vertical-axis wind-turbines are placed in close proximity to the horizontal axis wind turbine. The turbines are in close enough proximity to each other to have an effect on wind conditions that create lift on a turbine blade and turn the rotor of the horizontal axis wind turbine. The wind conditions caused by the vertical axis wind turbines include any of i) a wind wall effect, ii) increased pressure difference between a front side and a back side of the rotor of the horizontal axis wind turbine, and iii) downwind vertical mixing of the air. The vertical-axis wind-turbines and horizontal axis wind turbine are configured to use the wind conditions to convert wind into increases in generated electrical power.

Abstract: In an embodiment, a vertical axis wind turbine may be constructed to better survive wear and tear while being more energy efficient. A turbine blade may capture air movement to generate power. A blade arm may hold the turbine blade parallel to a rotating shaft. The blade arm may transmit torque from the turbine blade to the rotating shaft to drive a rotor of an electrical power generator. A moment-free connector may connect the turbine blade to the blade arm to transmit a stress maxima to a structural strongpoint of the turbine blade away from the moment-free connector.

Abstract: In an embodiment, an automatic wind turbine placement device may automatically place vertical axis wind turbines in a land plot. The automatic wind turbine placement device may factor a turbine parameter set describing a vertical axis wind turbine array with a land parameter set describing a land plot. The automatic wind turbine placement device may calculate an optimal vertical axis wind turbine placement on the land plot to maximize electrical power production based on the turbine parameter set and the land parameter set. The automatic wind turbine placement device may apply the optimal vertical axis wind turbine placement to a land plot description. The automatic wind turbine placement device may present an output land plot description describing the optimal vertical axis wind turbine placement in relation to the land plot to a user.