Structure for aerodynamic transition between mast and sail in a

Details Structure for aerodynamic transition between mast and sail in a Structure for aerodynamic transition between mast and sail in a

1993-11-26

1994-09-20

Avila, Stephen P.

Ships

Spars

Masts and masting

114102, B63B 1500

Patent

active

053479467

ABSTRACT:
Sail structure for sailcraft for improved air flow transition from the saraft mast. Several embodiments are provided in which a pair of sail luff panels are maintained in close proximity to aft portion of the mast. In a first and second embodiment, inflatable tubular inserts which slidably mate with the bolt rope groove of the mast are provided. In third and fourth embodiments, stackable and keyed inserts which engage the bolt rope groove are provided. In fifth and sixth embodiments, bolt rope tracks or grooves are provided in the mast for maintaining the position of the luff panels.

REFERENCES:
patent: 4064821 (1977-12-01), Roberts, Jr. et al.
patent: 4369726 (1983-01-01), Mader
patent: 4690088 (1987-09-01), Perini
patent: 4972789 (1990-11-01), Greppi
patent: 5109787 (1992-05-01), Peterson

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