for painting a rotor frame in accordance with the invention showing the vane supports and radial rib members is shown in fig1 and 16a the rotor profile has a significant effect on the power coefficient or energy capture ability of the rotor the rotor 190 is preferably constructed of four steel tubes 191 192 193 194 that are located at two different radial locations the tubes form the vane supports each tube 191 192 193 194 preferably includes axial slots 197 that receive the vane edges when the vanes are slid axially onto the rotor from the top end the tubes 191 192 193 194 are all connected together through steel radial rib members 195 that are fastened or welded in place every few axial feet along the length of the rotor 190 the radial rib members 195 which can be cnc plasma cut or manufactured by other low cost means have two ribs 198 199 that induce the curve shape on the vanes not shown when installed the ribs 198 199 engage the leading or radially outer faces of the vanes in this location the ribs 198 199 hold the vanes into the rotor a schematic diagram of the pitching moment generation on a single vane of a rotor in accordance with the invention is shown in fig1 the vane 210 for a rotor half is shown the airfoil shape 211 of the vane 210 controls the energy extraction from the wind the profile 211 generates a pitching moment 212 that provides rotor torque the pitching moment 212 varies with the instantaneous angle of incidence of the impending wind the torque generation can be resolved into lift forces 214 and drag forces 215 at any and.