... and Tower kits. Blue-Sky 1000W Wind Turbine system includes Turbine Head,yaw body,blade,tail system,Controller and ... Tower kits. Turbine Head and Yaw body is all Aluminum,light ... designed by computer system,blade still move in low wind speed,light weight 2.2KG 3pieces but ... same hard as steel, no flutter, low noise while moving.No break even in the strong ...