B - Operations – Transporting – 63 – H
Patent
B - Operations, Transporting
63
H
114/12, 116/84
B63H 9/04 (2006.01) B63B 49/00 (2006.01) G01P 13/02 (2006.01)
Patent
CA 1112954
ABSTRACT OF THE DISCLOSURE Apparatus and method are provided herein for indicating and adjusting the angle between the horizontal tangent to the luff or effective luff of a sail and the direction of the apparent wind. The apparatus includes a bracket carried by the luff or the effec- tive luff of the sail, and a wind vane pivotally mounted in the bracket, the wind vane being continually responsive to the direc- tion of the apparent wind at angles between and inluding the op- timum angle for maximum sail pulling power and the angle at which said sail stalls. The method comprises: (a) measuring the horizontal angle between the tangent to the luff or the effective luff of the sail and the direction of the apparent wind; and (b) adjusting the angle to 0° within the tolerance of measurement thereof and the tolerance of the adjustment. The apparatus is of simplified construction and operation which can be quickly and conveniently placed in direct line of observation by the helmsman and which gives a direct indication of the angle of attack of the sail. The method uses the direct indication provided to adjust the sail angle to produce maximum pulling power.
334402
Marcus & Associates
Schoneberger George
LandOfFree
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