likewise the power generated can be used to drive air compressor 33 if dc power is generated it can be transmitted to a storage battery or otherwise utilized dc electrical energy can be converted to ac electrical energy through a gemini synchronous inverter connected to a utility power grid during wind calm power is supplied by the utility excess power generated from the wind is returned to the utility grid for credit other means may be used to drive the air compressor the wind power generated can also be integrated with power generated by other means air hoses and electric power cables are laced through the hollow king pin structure generally indicated at 46 which also serves to hold the tower and bell assembly and the top assembly or superstructure in alignment the permanent magnet generators are over 90 efficient and because the field rotates and the armature remains fixed there are no brushes to arc or contend with for a four kilowatt unit in a 22 mile an hour wind the outside diameter of the rotating housing need only be about 15 inches this is quite suitable for a power plant of 40 50 kw with 12 foot diameter shrouds and propellers bolted to the rotating field housing by using a diameter on the cylindrical portion 2 of central member 1 equal to each of the shroud diameters a rather efficient structural design is provided this is further strengthened by the six radial gusset fins 9 that channel wind flow to each.