... impeller shape only propeller. When the wind blows the blades, produce blades rotating rotor dynamic driver. Blade material requirements, light weight, high ... other such as carbon). (now have some vertical rotor, s rotating blades, etc, and its function is the same type ... a super-low speed wind generators by rotating disk, fixed rotor blades, fixed, wheel, rod, pediatrias delboni auriemo plate, the ...