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The Retractable Blade Solar Wind Turbine

Honolulu-based Natural Power Concepts has designed a mobile, retractable-blade wind turbine that generatesboth wind and solar energy. Featuring seven instead of three blades, the wind turbine catches low-wind speeds more effectively. The energygenerated by the system is stored in a battery bank. The turbine is considered safer than utility-scale turbines as whenwind speed exceeds certain [...]

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