Mechanical-only, multi-use, automatically retractable vertical wind turbine, using wing drag

A vertical-axis wind-energy-conversion system (VAWECS) comprising:

• a central vertical mast;
• a plurality of axles, hinges, or pivots connected radially to the central vertical mast so that each axle's, hinge's, or pivot's axis of rotation is perpendicular to the central vertical mast's axis of rotation;
• a plurality of lever arms where each lever arm is connected to a said axle, hinge, or pivot,
• a plurality of wings where each wing is mounted on a said lever arm so that the majority of the wing or the entire wing is on one side of one or more lever arm axle, hinge, or pivot to form an assembly of the wing and lever arm and where
• the wing has a camber and
• when the assembly of the wing and lever arm is oriented so that the lever arm is generally perpendicular to the vertical mast
• the wing's positive-camber side generally faces toward a rotational direction of the central vertical mast and
• the wing's edge furthest from the central vertical mast is tilted, about the longitudinal axis of the lever arm, toward the rotational direction of the central vertical mast.