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Stabilised rotary sail rigging
Inactive Publication Date: 2019-11-28
INVERSAIL
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Summary
Abstract
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The patent describes a new type of rotating rig that has several advantages over traditional rigs. First, the top of the mast is stabilized, which means that the rig doesn't have the "whip effect" that traditional rigs do, even if they're kept the same size. Second, the rigs are easy to use and simple in design.
Problems solved by technology
Being the sailing community always thinking on narrow mono-hulls, masts transversally supported by shrouds with several cross-trees and their corresponding inner shrouds, enormous booms attached by their front to the mast, and controlled only by means of a sheet attached to its back; it was not easy to consider a solution which permitted that the said boom could rotate 360° and that the mast would have externally stayed.
Method used
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example-a
[0075]A 12 meter LOA cruising catamaran. (FIGS. 2.a, 2.b, and 2.c)
[0076]It has four shrouds and / or stays (7) for the stabilization of the mast. The rotating rig is placed on top of the cabin (9), it has a base platform (4) for its rotation control, and allows the crossing from one to the other on the rig through the slot between the mast and the rotating jib. The rotation of the rig can be more than 360°. There is also a 5.5 m2 fixed head sail (13), bent to the bow sprit (12) and to the hull (1).
[0077]It has a 18 meter mast with a 18 meter luff, a 9 meter common boom (3), and a 5.5 m2 fixed head sail. Approximate its maximum sail area would be:
Rotational: (18×9) / 2=81 m2
Fixed: (18×5.5) / 2=49.5 m2
Total: 130.5 m2
[0078]A similar catamaran such as the Nautitech Open 40 has:
Main: 64 m2
[0079]Head sail: 28 m2
Total: 92 m2
example-b
[0080]A non-foldable 14 meter LOA cruising trimaran. (FIG. 3).
[0081]It has a 360° rotating rig on top of the cabin (9), stabilized by four shrouds and / or stays (7), a common boom (3), controlled by a 5-meter diameter rotating base platform (4). It also has a fixed head sail (13) bent to a bow sprit (12).
[0082]It has a mast with a 19 meter luff, a 9 meter common boom, and a fixed head sail with a 7 meter luff. Approximate its maximum sail area would be:
Rotating: (19×9) / 2=85.5 m2
Fixed: (19×7) / 2=66.5 m2
Total: 152 m2
[0083]A similar trimaran, the Neel 45, has:
Main: 60 m2
[0084]Head sail: 46 m2
Total: 106 m2
example-c
[0085]A foldable 12 meter LOA cruising trimaran. (FIGS. 4.a, 4.b, 4.c). It has a rotating rig controlled by a rotating base platform (4), backed by an emergency sheet (15). FIG. 4.a is a side elevation of the boat, FIG. 4.b is a view from above of the boat with its floats deployed, and FIG. 4.c shows the interior of the boat marking the position of the rotating mast and the position of the arms. The mast is stabilized by six shrouds and / or stays (7), four are fixed and two of them are only used when the floats are deployed.
[0086]The mast's luff measures 16 meter, the common boom 7.5 meter, and the fixed head sail luff 5 meter. Approximate its maximum sail area would be:
Rotating: (16×7.5) / 2=60 m2
Fixed: (16×5) / 2=40 m2
Total: 100 m2
[0087]A similar trimaran, for example, the Dragonfly 1200, has
Main: 60 m2
[0088]Head sail: 35 m2
Total: 95 m2
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Abstract
Stabilized rotating sailing rig for boats formed by a mast, a boom perpendicular to the mast, and one or more sails bent to the common boom and to the mast; rig capable of freely rotating with all its elements, around a vertical axis, with the important and novel characteristic that the top of the mast is stabilized by shrouds and / or stays which tie it to the periphery of the deck or decks of the boat without jeopardizing the rotation of the rig around its vertical axis. This top of the mast stabilization also permits the use of prow fixed sails.
Description
CROSS REFERENCE TO RELATED APPLICATION[0001]This application is a national stage entry of PCT / ES2018 / 070055 filed Jan. 24, 2018, under the International Convention and claiming priority over Spain Patent Application No. P 201700055 filed Jan. 26, 2017.FIELD OF THE INVENTION[0002]The present invention is a sailing rig for boats which combines the advantages of the self-supported rotating rigs of being able to rotate around themselves, even over 360°, with the advantages of simplicity and strength of the rigs stabilized by means of shrouds and stays, and also the advantage of being able to use fixed head sails.DESCRIPTION OF THE PRIOR ART[0003]On the traditional sailing rigs, with a main sail at the back and one or more head sail at the front, the transversal stability of the rig is achieved by means of a network of shrouds and inner shrouds placed at both sides of the mast, basically perpendicular to the boats plane of symmetry. This precludes for the main sail's boom to go beyond th...
Claims
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Application Information
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