Patent-family-39477899

A plurality of airfoils (140; 150, 160, 170, 180) for a wind turbine blade (100), the wind turbine having a wind turbine hub, each airfoil (140) having: a leading edge (200); a blunt trailing edge (210); a chord line (190) extending from the leading edge (200) to the blunt trailing edge (210); a substantially oval suction side (220) and a substantially S-shaped pressure side (230), the plurality of airfoils (140; 150, 160 , 170, 180) have decreasing cross-sectional areas along the wind turbine blade in a direction away from the wind turbine hub, the essentially oval suction sides (220) having dimensionless X / c and positive Y / c coordinate values, as shown in Tables 1- 4, where the X / c values represent locations on the chord line (190) relative to the trailing edge (210) and the Y / c values represent heights from the chord line (190) to points on the suction sides (220) , or where those in We Major S-shaped printed pages (230) have dimensionless X / c and negative Y / c coordinate values as given in Tables 1-4, the X / c values being relative to locations on the chord line (190) of the trailing edge (210) and the negative Y / c values represent heights from the chord line (190) to points on the printed pages (230).