Here's a very impressive Inventor animation on YouTube. The video's creator reports that this project was taken on, in order to explore the concept of low speed wind turbines and learn new CAD skills. I think this is an outstanding way to learn Inventor.
According to the video details the turbine is 212 feet tall and the control surfaces are 62 feet long by 12.5 feet wide.
Some Interesting Related Links
(compiled by the TheWindGinProject and reposted here):
Generator designed specifically for wind turbines - http://www.exro.com/
4 generator wind turbine - http://www.libertyturbine.com/
Tilt Down Tower - http://www.youtube.com/watch?v=Nf7vqRb1LBw
Power Consumption Table - http://www.absak.com/library/power-consumption-table