a means for controlling a pitch angle of said blades by a crankshaft means as a function of the rotational angle to provide said blades with the dual capability of gathering wind energy and {HEAD ~ generating airlift} for {TAIL ~ the station}, where 
a means for controlling a pitch angle of said blades by a crankshaft means as a function of the rotational angle to provide said blades with the dual capability of gathering wind energy and { HEAD ~ generating airlift } for { TAIL ~ the station } , where
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH