is firmly supported in its coaxial relationship with respect to the central axle structure 16 airfoil 22 is a part of turbine blade support ring 19 and is a circular structure that is also coaxial with respect to the central axle structure 16 airfoil 22 is joined to the perimeter rim 20 and to the turbine cables 26 accordingly airfoil 22 rotates in unison with turbine wheel 14 about central axle structure 16 as will be described in more detail hereinafter fig4 shows a schematic view of the airfoil with the airfoil shown in two cross sections that are closely spaced to one another the airfoil 22 has a longitudinal axis 30 an inwardly facing lift surface 32 and an outwardly facing stable surface 34 generally the stable surface 34 is closer to being parallel to the longitudinal axis 30 than the lift surface 32 the lift surface is convex and requires a more radical change of direction of the atmospheric wind flowing about the airfoil as shown by the dash lines passing over the surfaces the atmospheric wind 36 moves toward the front edge of the turbine blades 24 and travels across the lift surface 32 and stable surface 34 as shown by the dash lines of fig4 the longitudinal axis 30 of the air foil 22 is oriented at an angle of attack 39 with respect to the direction of the on coming atmospheric wind 36 the angle of attack 39 typically will be approximately 20.