US 11,754,040 B2
Automatic-aerodynamic pitch control for wind turbine blade
Larry Lee Mansberger, Fort Worth, TX (US)
Assigned to Mansberger Aircraft Inc., Fort Worth, TX (US)
Filed by Larry Lee Mansberger, Fort Worth, TX (US)
Filed on Aug. 16, 2021, as Appl. No. 17/403,122.
Prior Publication US 2023/0049189 A1, Feb. 16, 2023
Int. Cl. F03D 7/02 (2006.01); F03D 1/06 (2006.01); F03D 80/70 (2016.01)
CPC F03D 7/0224 (2013.01) [F03D 1/0675 (2013.01); F03D 80/70 (2016.05); F05B 2240/52 (2013.01); F05B 2270/328 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A wind turbine rotor blade comprised of a reflexed airfoil formed along a longitudinal axis of said blade with said longitudinal axis centered on an extension of the structural spar of said blade thusly forming a spar stub which transfers loads to a rotor hub through the means of at least two axial bearings and one centrifugal thrust bearing allowing the blade to rotate freely around said longitudinal axis which is furthermore located forward of the aerodynamic center of the mean aerodynamic airfoil of said blade and in which said blade is mass balanced about said blade's longitudinal axis and wherein the angle of attack of the blade with the relative airflow and the subsequent pitch of the blade are self-aligning due to the aerodynamic forces.