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