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