Patent ID: 6602045
Filing Date: 2003-08-05
Classification: F03D,F05B,Y02E,Y10S

Abstract:
A windmill comprising:at least one propeller, having a diameter and a wake, wherein said propeller comprises a rotating hub, to which at least one blade is attached, wherein said rotating hub comprises a diameter, as measured in the plane of rotation of the propeller, between 28% and 70% of said propeller diameter; a stationary hub which supports said rotating hub; a hub pivot which supports said stationary hub, allowing yaw control of said propeller with respect to the wind; at least one support structure having two ends, the first end of said at least one support structure supporting said hub pivot; the second end being fixed to a foundation; at least one wing with an airfoil cross section, having a span of at least one half of said propeller diameter, enclosing said at least one support structure; at least one wing pivot which supports said wing, allowing yaw control of said wing with respect to the wind; and wherein said at least one wing with an airfoil cross section sheds a tip vortex into said wake of said propeller.