Aerodynamic mainsail and furling device

Details Aerodynamic mainsail and furling device Aerodynamic mainsail and furling device

1977-10-13

1979-04-17

Frankfort, Charles E.

Ships

Sail or control means therefor

Reefing and furling

114 39, 114 90, B63H 910

Patent

active

041494822

ABSTRACT:
A sleeve is rotatably mounted on the hull of a vessel on a generally vertical axis and contains and completely supports the mainsail rollably furled or partly furled about a generally vertical axis. The sleeve is aerodynamically formed with a forward curved nose and opposite aerodynamic sides extending rearwardly from the nose and converging toward each other with a slot at the aft end between the sides through which slot a sail may be movable to furl within the sleeve or may be pulled out at the aft end of the sleeve through the slot various extents for providing the desired area of sail exposed to the wind, thus providing a roller reefing arrangement by rolling the luff of the mainsail to partly furl it within the sleeve.

REFERENCES:
patent: 1613890 (1927-01-01), Herreshoff
patent: 1700660 (1929-01-01), Williams
patent: 2077685 (1937-04-01), Gerhardt
patent: 2107303 (1938-02-01), Ljungstrom
patent: 2561253 (1951-07-01), Wells-Coates
patent: 3381647 (1968-05-01), Keeler
patent: 3487800 (1970-01-01), Schweitzer et al.
patent: 3720180 (1973-03-01), Stangeland
patent: 3749042 (1973-07-01), Jackson
patent: 3835804 (1974-09-01), Jackson

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