A wind powered variable area exit aperture electric generating system having configurable, adjustable duct side walls by which means the ratio between {TAIL ~ the intake cross sectional aperture area} and {HEAD ~ the exhaust cross sectional aperture area} may be varied for maximum air molecule flow through the duct, leading to ideal maximum electrical output for any given air mass input 
A wind powered variable area exit aperture electric generating system having configurable , adjustable duct side walls by which means the ratio between { TAIL ~ the intake cross sectional aperture area } and { HEAD ~ the exhaust cross sectional aperture area } may be varied for maximum air molecule flow through the duct , leading to ideal maximum electrical output for any given air mass input
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