Boom-footed sail efficiency enhancement system

Details Boom-footed sail efficiency enhancement system Boom-footed sail efficiency enhancement system

1985-05-03

1987-05-12

Peters, Jr., Joseph F.

Ships

Sail or control means therefor

Specific sail structure or arrangement

114 39, 114364, B63H 904

Patent

active

046640509

ABSTRACT:
To prevent crossflow of wind and increase aerodynamic efficiency of a boom-footed sail, a stationary structure which forms a compliant sliding seal with the boom, in particular a vertical baffle structure, is mounted along the centerline of a sailboat under the boom. The top portion of the baffle is made of a compliant sealing material, e.g., closed cell polyurethane foam, which forms a tight seal with the boom when the boom is positioned substantially along the centerline, as is common when sailing to weather, and over a range of vertical and horizontal motion of the boom. The boom and baffle can have curved side surfaces which form with the sail a substantially continuous surface which extends the effective sail area down to the deck.

REFERENCES:
patent: 3598075 (1971-08-01), Kenney
patent: 4365570 (1982-12-01), Jamieson
patent: 4437426 (1984-03-01), Latham
patent: 4492175 (1985-01-01), Johnson
10/1983 Matt Schweitzer, Pro Design, (advertisement).

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