Asymmetrical sailing catamaran keels

Details Asymmetrical sailing catamaran keels Asymmetrical sailing catamaran keels

1993-10-15

1995-01-10

Avila, Stephen P.

Ships

Displacement-type hull

Multiple hulls

114292, B63B 100

Patent

active

053797108

ABSTRACT:
The present invention consists of two asymmetrical hulls connected by a crossbeam or deck structure to make up a catamaran. Each hull has a rounded or shallow angled outer surface below the water line. The inboard side presents a vertical, or near vertical surface below the water line to act as an effective leeway preventer, to resist sideways movement under normal sailing conditions. The vertical surface may have a winglet at the keel and a flow directing vane to prevent vortexes and to maintain parallel flow of water along the whole length of the surface.

REFERENCES:
patent: 2918031 (1959-12-01), Gunderson
patent: 3139058 (1964-06-01), Robinson
patent: 3831540 (1974-08-01), Case
patent: 5038696 (1991-08-01), Athanasiou et al.
patent: 5188049 (1993-02-01), Graf
patent: 5231949 (1993-08-01), Hadley

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