Ships – Sail or control means therefor – Reefing and furling
Patent
1988-03-03
1990-03-27
Basinger, Sherman D.
Ships
Sail or control means therefor
Reefing and furling
114 391, 114102, 114107, B63H 910
Patent
active
049110934
ABSTRACT:
A rigging and sail system for a sailboat including a rotatable mast having mounted thereon for rotation therewith, a pair of upper and lower booms extending transversely of the mast. The booms are connected to the mast through upper and lower tension members extending between the mast and the outer ends of the booms respectively and vertical fore and aft tension members extending between outer end portions of the booms on opposite sides of the mast. A pair of sails such as a main and jib are sheeted to and between the booms on opposite sides of the mast to be movable with the booms relative to the hull, and with the jib being movable relative to the booms to allow self-tacking during use merely upon steering the sailboat across the wind. The booms also provide horizontally extending air barriers above and below the upper and lower horizontal edges of the sails respectively to prevent or reduce loss of air across the sail edges while also channelling the air to flow horizontally along the surface of the sails in the fore-aft direction. In one embodiment, the main sail is attached at its leading edge to a furling sleeve received about the mast for rotation to allow furling upon rotation of the sleeve. The leading edge of the jib is attached about the fore tension member or about a furling sleeve rotatably received about the tension member. Several other embodiments are disclosed.
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Aero-Hydrodynamics of sailing, Marchat, Chapter D Three-Dimensional foils.
Basinger Sherman D.
Bergstrom Joan
Brahan Thomas J.
Mouzavires William E.
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