Dual hull watercraft

Details Dual hull watercraft Dual hull watercraft

1997-10-31

1999-04-27

Swinehart, Ed L.

Ships

Watercraft with means used in providing sailpower

Multiple hulls

114 61015, B63B 3500

Patent

active

058968253

ABSTRACT:
In a dual-hull watercraft, a separate keel hull and sail hull are connected by a tie line. The sail hull comprises a sail and hull without a keel. The keel hull comprises a keel and hull or a submerged keel. The flexible tie line is coupled to the keel at or near the keel center of effort and is coupled to the sail at or near the center of sail effort. During operation, the sail and keel are configured to "toe in" relative to each other, maintaining tension in the tie line allowing the sail and keel to provide for the other's drag. The tie line allows for directional steering of the craft without a rudder, and for controlling the speed of the craft and the heel angles of the sail and keel hulls. Two gliders similarly connected can exploit wind velocity differences and are operable without updrafts.

REFERENCES:
patent: 606104 (1898-06-01), Twining
patent: 3295487 (1967-01-01), Smith
patent: 3870004 (1975-03-01), Bailey
patent: 4280428 (1981-07-01), Werner, Jr.
patent: 4831950 (1989-05-01), Allured
patent: 4867089 (1989-09-01), Haigis

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