Parametric helical Darrieus vertical axis wind turbine

Get the new version here!
http://www.thingiverse.com/thing:15083

I am currently in the middle of my Repstrap build, and my brother-in-law asked me why I am investing so much energy to get this done, if I can redirect my efforts into some way to obtain renewable energy (in order to get away from the high electricity bills)

This is my answer to him!

Thanks again to buzz for his Parametric NACA airfoil code.
This project is dependent on the Parametric NACA4 Library I posted earlier.