2009: The Year in Innovation

rooftop wind turbine, turbine, windtronics, wind energy, wind speed
Photo by Mark Wiens
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A Rooftop Wind Turbine

Generally, rooftop turbines can’t produce electricity unless the wind is blowing six or eight miles per hour. This turbine is different. Developed by WindTronics, based in Muskegon, Michigan, it’s only 6 feet in diameter and can generate energy at wind speeds of just two miles per hour. WindTronics moved the power-generating parts to the outside of the wheel, where the blades turn faster. Reducing the bulk in the center also allows the turbine to turn more easily.