forward u201d and u201c rearward u201d in this description refer to upwind and downwind directions respectively when the turbine generator is in this nominal operating position for example in normal operation the blades 21 are u201c rearward u201d and u201c downwind u201d of the nacelle 22 this designation is for convenience of description only and not intended to limit the scope of the invention in the fully extended position the long axis of the blades along the airfoil span is in a normal direction right angle to the direction of the prevailing airflow fig3 a and 3b are rear and side views respectively of an exemplary folding blade turbine generator 20 with turbine blades 21 in the fully folded position here the long axis of the blades 21 are parallel to the axis of rotation which also is the direction of the prevailing wind each blade 21 is pivotally mounted to a drive hub 30 that rotates with the blades 21 blades may pivot between extended and folded positions while rotating as discussed more fully below fig4 is an exploded perspective view of major assemblies of the turbine generator 20 of fig2 a 2 b 3 a and 3 b in addition to previously mentioned blades 21 nacelle 22 mast 23 and drive hub 30 this figure illustrates drive shaft 40 sliding shaft 41 and sliding hub 42 the blades 41 mount pivotally to drive hub 30 which in turn is welded or otherwise affixed to drive shaft 40 drive shaft 40 in turn.