Sorry, there are no free rides... the trick is to work on the conversion efficiency to boost output of the machine.  

  The biggest problem in extracting energy from the wind is the overall efficiency.   That is to say, taking the wind and converting it to a useable form of electric in the shortest possible way.  We can make a turbine that will extract energy at the Betz limit, that's the easy part.  It boils down to our conversions that screw it all up.   We have wind but we want/need 110vAC at 60hz ( or DC appliances ).  So here is what we do to get it...  Wind to mechanical energy, mechanical to AC, AC to DC, store it in batteries, DC to AC through an inverter to power low efficient devices.  Each time we convert the energy to a different form there are losses.  It's actually quite amazing we get as much as we do in the end.  For instance... lets say there is 1000 watts of wind energy passing through the blades and we manage to get 60%, we filter it through an alternator that is 60% efficient, pass it down some wires - we'll call it 95%, convert it to dc and stuff in in some batteries 90% (if we're lucky ) then through an inverter that is 90% efficient.  What is left for our use.... 270 watts out of 1000.  When we pass it through some low efficient device were actually get to use 200 watts of all the work to get it there.  

  We need a computer controlled wind oscillator that converts wind to 120v 60hz AC on demand and then stores the unused portion so we can waste it later.