Patent ID: 7896609

Claim:
A wind turbine system comprising: a base, said base standing in a substantially vertical orientation in relation to a foundation or ground and having a bottom end and a top end; a rotating shaft extending from said top end of said base in a substantially vertical orientation; a lower shaft attachment means attached to said shaft; an upper shaft attachment means attached to said shaft above said lower attachment means; a turbine comprising a plurality of blades, each of said blades formed from a curved 27-2012 airfoil and having a first end fabricated from a rubber or elastomer and attached to said upper shaft attachment means and a second end fabricated from elastomer or rubber and attached to said lower shaft attachment means, wherein each of said first ends is attached to said upper shaft attachment means by a swivel connection and each of said second ends is fixedly attached to said lower shaft attachment means using a plurality of bolts; wherein said second end is curved toward said first end to form a peak wherein the length of said airfoil from said peak to said second end is less than the length of said airfoil from said peak to said first end; and, wherein the angle between said peak and said second end is more acute than the angle between said peak and said first end; and, wherein each of said vanes twists on said swivel connection when rotating at a velocity above a first threshold velocity.