Ships – Sail or control means therefor – Specific sail structure or arrangement
Patent
1981-04-28
1983-12-06
Blix, Trygve M.
Ships
Sail or control means therefor
Specific sail structure or arrangement
114 39, B63H 906
Patent
active
044186320
ABSTRACT:
A rigid marine sail has a rigid left sail portion and a rigid right sail portion, both of which are pivotally secured to a mast on a ship so as to be pivotable about one common pivot axis which extends substantially parallel to the mast of the ship. The common pivot axis is spaced ahead of the mast with respect to the direction of intended movement of the ship. The left and right sail portions are foldable to an operable position by pivoting them about the common pivot axis and are also foldable to a streamlined folded inoperable position by being pivoted about the one common pivot axis, the left and right sail portions being substantially parallel to each other and closely facing each other when they are in their streamlined folded inoperable positions. A shroud is provided ahead of the common pivot axis with respect to the direction of movement of the ship. When the left and right sail portions are in their folded inoperable position, the shroud spans a gap between them to reduce air resistance. When the sail portions are unfolded to their operable positions, only the left and right sail portions serve as sail members and they also shield the shroud from exposure to the wind.
REFERENCES:
patent: 3934533 (1976-01-01), Wainwright
Marine Engineers Review, Oct. 1980, Warley, West Midlands, GB "Japan Launches First Wind-Assisted Ship", p. 19.
New York Times Magazine Section, Dec. 6, 1981, "A Fresh Wind for Sail Power" by Joanne A. Fishman.
Kusumoto Katsunori
Shimizu Kazuyuki
Watari Takashi
Yoshimi Kazuhiko
Blix Trygve M.
Brahan Thomas J.
Japan Marine Machinery Development Association
Nippon Kokan Kabushiki Kaisha
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