... . Blue-Sky 1000W Wind Turbine system includes Turbine Head,yaw body,blade,tail system,Controller and Tower kits. Turbine Head and Yaw body is ... the rotor will not burn even in the high wind speed. assembly as Permanently Sealed Unit. No lubrication or overhaul maintenance ... designed by computer system,blade still move in low wind speed,light weight 2.2KG 3pieces but same hard as steel ...