a wind turbine apparatus , comprising an upright shaft defining an upright axis , at least two blades operatively connected to the shaft to rotate about the shaft axis as the blades are wind driven about the axis , the lowermost portion of each blade being offset , azimuthally , relative to the uppermost portion of each blade , baffles carried by the blades to project directionally to receive impingement of wind for creating torque transmitted to the blade to effect blade rotation about the axis .