Frame spar for soft airfoils

Details Frame spar for soft airfoils Frame spar for soft airfoils

1988-02-11

1989-12-12

Basinger, Sherman D.

Ships

Sail or control means therefor

Specific sail structure or arrangement

114 391, 114 89, 114 90, 114 98, B63H 906

Patent

active

048860085

ABSTRACT:
A sloop comprising a mast in the form of an A-frame with its plane athwartships. The luff of the mainsail is supported by a mainstay which is a thin wire or rod running from the apex of the A-frame vertically to a point on deck between the legs of the A-frame. This structure eliminates the turbulence along the leading edge or luff of the mainsail caused by conventional masts, and also permits a headsail to be closely hauled. The A-frame comprises one or more rigid horizontal spreaders and the mainsail boom and a spinnaker pole can be slidably mounted thereon.

REFERENCES:
patent: 1813937 (1931-07-01), Krussand
patent: 2147501 (1939-02-01), Ryder
patent: 2804038 (1957-08-01), Barkla
patent: 3142282 (1964-07-01), Nichols
patent: 3464379 (1969-09-01), Lawson
patent: 4603648 (1986-08-01), Berge
patent: 4633797 (1987-01-01), Hoyt
patent: 4723498 (1988-02-01), Stampe

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