Rigging base for plural-hull sailing craft and methods for sail

Details Rigging base for plural-hull sailing craft and methods for sail Rigging base for plural-hull sailing craft and methods for sail

1977-06-09

1978-08-22

Blix, Trygve M.

Ships

Sail or control means therefor

Specific sail structure or arrangement

114 39, 114 61, B63H 904

Patent

active

041081005

ABSTRACT:
An elongated spar is attached longitudinally to cross-members interconnecting the hulls of plural-hull sailing craft, which spar projects forward to provide points of attachment for the forestays and headsail tacks of the sailing craft, whereby the forces exerted by the forestays and headsail tacks are removed from the bows of the hulls of the sailing craft and employed to oppose mast downthrust forces, substantially reducing the load on the hull-interconnecting structure. If applied to existing sailing craft the danger of hull breakage is eliminated and danger of hull-interconnecting structure failure is greatly reduced. The forward projection of the spar may be fabricated to cause a controllable lateral deflection of the luff of the headsail, to vary the airflow through the slot between the headsail and a mainsail. Similarly, an aftward projection may be employed to control mainsail sheeting angle and to make the mainsail self-tending when the sailing craft tacks. For sailing craft which reverse the direction of travel identical projections are provided at both ends of the spar. For sailing craft undergong a mirror-image transformation in spatial relationship of the hulls the spar is pivotally mounted such that the sails also undergo a mirror-image transformation simultaneously.

REFERENCES:
patent: 1856803 (1932-05-01), Blackman
patent: 2351542 (1944-06-01), Paull
patent: 3316873 (1967-05-01), Dismukes
patent: 3839979 (1974-10-01), Wassell
patent: 3841251 (1974-10-01), Larson
patent: 3933110 (1976-01-01), Jamieson

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