Abstract
Wind vanes with reduced moment of inertia (one order lower than conventional) are tested in the wind tunnel. The results show a marked reduction in the overshoot amount, or a remarkable increase in the damping ratio. The nature of its effectiveness in suppressing the overshoot is different from that of an oil-damper. The shortcomings of the reduced rigidity can be remedied by utilizing a wind vane of ordinary design, but equipped with a rudder that acts upon the acceleration feedback of the vane oscillation.
