| 摘要 |
A wingsail sailset comprises a main symmetrical wing 1 which is freely rotatable 360 degrees about an upright axis 5 and a tail vane 3 which is settable about an upright axis spaced from the axis of the main aerofoil to cause the main aerofoil to adopt an angle of attack to the direction of the wind. The setting of the tail vane is adjusted by a pushrod 9 or wires connected to a circular cam 4, mounted eccentrically to the sailset pivot. The cam can be moved by the operator from an eccentric position to a concentric position to allow the tail vane to lessen its effect or assume a zero angle of attack, and in so doing, lessen the thrust of the main wing or bring the thrust to zero for parking purposes. |
