WO2016113657A1 - Triangular sail for a boat, having a swivelling winglet - Google Patents
Triangular sail for a boat, having a swivelling winglet Download PDFInfo
- Publication number
- WO2016113657A1 WO2016113657A1 PCT/IB2016/050099 IB2016050099W WO2016113657A1 WO 2016113657 A1 WO2016113657 A1 WO 2016113657A1 IB 2016050099 W IB2016050099 W IB 2016050099W WO 2016113657 A1 WO2016113657 A1 WO 2016113657A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sail
- hinge
- stiffening
- remaining part
- control device
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H9/00—Marine propulsion provided directly by wind power
- B63H9/04—Marine propulsion provided directly by wind power using sails or like wind-catching surfaces
- B63H9/06—Types of sail; Constructional features of sails; Arrangements thereof on vessels
- B63H9/061—Rigid sails; Aerofoil sails
- B63H9/0621—Rigid sails comprising one or more pivotally supported panels
- B63H9/0628—Rigid sails comprising one or more pivotally supported panels the panels being pivotable about horizontal axes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H9/00—Marine propulsion provided directly by wind power
- B63H9/04—Marine propulsion provided directly by wind power using sails or like wind-catching surfaces
- B63H9/06—Types of sail; Constructional features of sails; Arrangements thereof on vessels
- B63H9/061—Rigid sails; Aerofoil sails
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
- B63B2035/009—Wind propelled vessels comprising arrangements, installations or devices specially adapted therefor, other than wind propulsion arrangements, installations, or devices, such as sails, running rigging, or the like, and other than sailboards or the like or related equipment
Definitions
- Triangular sail for a boat having a swivelling winglet
- the present invention relates in a general way to the field of sailing.
- head denotes the part of the sail terminating at the upper vertex of a triangular sail.
- the halyard for hoisting the sail is fastened to this vertex.
- One object of the present invention is to overcome or at least mitigate the problems of turbulence associated with the air flows at the head, and thus improve the aerodynamic efficiency of the sail.
- the invention proposes a triangular sail for a vessel, comprising an upper end sail portion connected to the remaining part of the sail through a hinge extending in the direction of air flow with respect to the sail, said upper end sail portion thereby being movable in a laterally swivelling manner with respect to the remaining part of the sail.
- the "head”, as it is known, is therefore made to be capable of swivelling by means of a hinge with respect to the remaining part of the sail, and is therefore adjustable by means of a control device such as a pulley having corresponding running rigging which is taken to the deck of the boat.
- the present invention can be applied to sails made of flexible material and also to wing- sails, such as those used on boats competing in the America's Cup races.
- Figure 1 is a simplified representation showing a right-hand side view of part of the rig of a boat
- Figure 2 is a simplified representation showing a perspective view of part of the rig of the boat of Figure 1 ;
- Figure 3 is a simplified representation showing a stern view of the boat of Figure 1.
- the drawings show, for illustrative purposes but in a non-limiting way, a boat with a Marconi sloop rig.
- the boat comprises a principal sail of triangular shape, conventionally called a "mainsail" and indicated as a whole by the number 10 in the figures.
- the number 20 indicates a spar to which the forward edge 1 1 of the sail 10 is secured, while 30 indicates a boom to which a lower aft corner of the sail l O ' is secured.
- the spatial terms used in the present description refer to the normal condition in which the sail is used.
- triangular is not intended to mean that the sail must have an exactly triangular shape; in fact, it may have a shape which is only approximately triangular. In any case, the sail must be configured so as to have a vertical edge (or “luff) secured or capable of being secured to a spar.
- the sail 10 is of flexible material; it may conventionally comprise a stiffening/supporting headboard 40 fixed to the sail 10 in the upper part (or "head") thereof.
- the headboard 40 is conventionally fastened to a cable or rope 50, called a "halyard" and provided for hoisting the sail.
- the sail 10 comprises an upper end sail portion 60, which is connected to the remaining part of the sail 10 through a hinge 70 extending in the direction of the air flow with respect to the sail 10, indicated by the arrow F in Figure 1, that is to say in a direction which is substantially horizontal in use.
- the hinge 70 is positioned between a lower end of the upper end sail portion 60 and an upper end of the remaining part of the sail 10, and interconnects these.
- the hinge 70 may be formed by a single extended hinge element, or may be formed by a series of hinge units positioned along the direction of extension of the hinge. Possible examples of construction for the hinge include hinges of the type formed by a pair of leaves joined by a pin, or film hinges.
- the upper end sail portion 60 is therefore movable in a laterally swivelling way with respect to the remaining part of the sail 10.
- a rotary control device 80 such as a pulley, is provided, and is positioned at an end of the hinge 70 for controlling the rotation of the upper end sail portion 60 with respect to the remaining part of the sail 10.
- the rotary control device 80 has an axis of rotation parallel to the direction of extension of the hinge 70; the stiffening/supporting element 61 of the upper end sail portion 60 is positioned so as to be rotationally fixed to the rotary control device 80.
- a cable or rope 81 (or "running rigging") is associated with the rotary control device 80 and is taken to the deck of the boat for controlling the rotation of the upper end sail portion 60.
- guide members 82 for example rings, for guiding respective lengths of the running rigging is such a way that it does not interfere with other sheets of the boat.
- Part of the hinge 70 and the rotary control device are supported by the stiffening/supporting headboard 40.
- the upper end sail portion 60 Since the halyard 50 is fastened to the sail 10 at the top of the part of the sail below the hinge 70, the upper end sail portion 60 must have a separate arrangement to enable it to remain in the unfurled condition; for this purpose, provision may be made for the upper end sail portion 60 to include a stiffening/supporting element 61, such as a batten, posi- tioned at a vertical edge of this portion.
- a stiffening/supporting element 61 such as a batten, posi- tioned at a vertical edge of this portion.
- a system (not shown) is also provided to ensure the return of the upper end sail portion 60 to the position of alignment with the rest of the sail 10, when the cable or rope 81 is not actuated by the crew operating the rigging.
- the inclination of the upper end sail portion 60 with respect to the sail 10 can be adjusted by acting on the cable or rope 81 connected to the control device 80.
- This inclination can be adjusted in either direction, depending on whether the sailing boat is sailing on the starboard or port tack.
- Figure 3 shows that the upper end portion 60 is not in alignment with the remaining part of the sail, but is inclined laterally.
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Toys (AREA)
Abstract
Triangular sail for a boat, comprising an upper end sail portion (60) connected to the re¬ maining part of the sail (10) through a hinge (70) extending in the direction (F) of the air flow with respect to the sail. The upper end sail portion is therefore movable in a laterally swivelling way with respect to the remaining part of the sail (10).
Description
Triangular sail for a boat, having a swivelling winglet
The present invention relates in a general way to the field of sailing.
As is known, in the context of sailing the term "head" denotes the part of the sail terminating at the upper vertex of a triangular sail. The halyard for hoisting the sail is fastened to this vertex.
It is also known that, in boats with triangular sails, such as sloops, the air flows circulating around the head are turbulent, thus increasing the aerodynamic drag and thereby reducing the overall efficiency of the sail.
One object of the present invention is to overcome or at least mitigate the problems of turbulence associated with the air flows at the head, and thus improve the aerodynamic efficiency of the sail.
In view of these objects, the invention proposes a triangular sail for a vessel, comprising an upper end sail portion connected to the remaining part of the sail through a hinge extending in the direction of air flow with respect to the sail, said upper end sail portion thereby being movable in a laterally swivelling manner with respect to the remaining part of the sail.
In a sail according to the present invention, the "head", as it is known, is therefore made to be capable of swivelling by means of a hinge with respect to the remaining part of the sail, and is therefore adjustable by means of a control device such as a pulley having corresponding running rigging which is taken to the deck of the boat.
This is because it has been found that, by inclining the head laterally, particularly downwind with respect to the wind direction for close-hauled sailing, the interaction of the head with the air flows can be adjusted, improving its aerodynamic efficiency and thus improving the overall efficiency of the sail.
The present invention can be applied to sails made of flexible material and also to wing-
sails, such as those used on boats competing in the America's Cup races.
Specific embodiments are described in the dependent claims, the content of which is to be considered as an integral part of the present description.
Other characteristics and advantages of the invention will be apparent from the following detailed description, which is given purely by way of non-limiting example, with reference to the attached drawings, in which:
Figure 1 is a simplified representation showing a right-hand side view of part of the rig of a boat;
Figure 2 is a simplified representation showing a perspective view of part of the rig of the boat of Figure 1 ; and
Figure 3 is a simplified representation showing a stern view of the boat of Figure 1.
The drawings show, for illustrative purposes but in a non-limiting way, a boat with a Marconi sloop rig. The boat comprises a principal sail of triangular shape, conventionally called a "mainsail" and indicated as a whole by the number 10 in the figures. The number 20 indicates a spar to which the forward edge 1 1 of the sail 10 is secured, while 30 indicates a boom to which a lower aft corner of the sail l O'is secured. The spatial terms used in the present description refer to the normal condition in which the sail is used.
The term "triangular" is not intended to mean that the sail must have an exactly triangular shape; in fact, it may have a shape which is only approximately triangular. In any case, the sail must be configured so as to have a vertical edge (or "luff) secured or capable of being secured to a spar.
In the example shown in the figures, the sail 10 is of flexible material; it may conventionally comprise a stiffening/supporting headboard 40 fixed to the sail 10 in the upper part (or "head") thereof. The headboard 40 is conventionally fastened to a cable or rope 50, called a "halyard" and provided for hoisting the sail.
The sail 10 comprises an upper end sail portion 60, which is connected to the remaining
part of the sail 10 through a hinge 70 extending in the direction of the air flow with respect to the sail 10, indicated by the arrow F in Figure 1, that is to say in a direction which is substantially horizontal in use.
The hinge 70 is positioned between a lower end of the upper end sail portion 60 and an upper end of the remaining part of the sail 10, and interconnects these.
The hinge 70 may be formed by a single extended hinge element, or may be formed by a series of hinge units positioned along the direction of extension of the hinge. Possible examples of construction for the hinge include hinges of the type formed by a pair of leaves joined by a pin, or film hinges.
The upper end sail portion 60 is therefore movable in a laterally swivelling way with respect to the remaining part of the sail 10. For this purpose, a rotary control device 80 such as a pulley, is provided, and is positioned at an end of the hinge 70 for controlling the rotation of the upper end sail portion 60 with respect to the remaining part of the sail 10. The rotary control device 80 has an axis of rotation parallel to the direction of extension of the hinge 70; the stiffening/supporting element 61 of the upper end sail portion 60 is positioned so as to be rotationally fixed to the rotary control device 80. A cable or rope 81 (or "running rigging") is associated with the rotary control device 80 and is taken to the deck of the boat for controlling the rotation of the upper end sail portion 60. On the opposite sides of the sail 10 there are positioned guide members 82, for example rings, for guiding respective lengths of the running rigging is such a way that it does not interfere with other sheets of the boat.
Part of the hinge 70 and the rotary control device are supported by the stiffening/supporting headboard 40.
Since the halyard 50 is fastened to the sail 10 at the top of the part of the sail below the hinge 70, the upper end sail portion 60 must have a separate arrangement to enable it to remain in the unfurled condition; for this purpose, provision may be made for the upper end sail portion 60 to include a stiffening/supporting element 61, such as a batten, posi-
tioned at a vertical edge of this portion.
A system (not shown) is also provided to ensure the return of the upper end sail portion 60 to the position of alignment with the rest of the sail 10, when the cable or rope 81 is not actuated by the crew operating the rigging.
With the arrangement described above, the inclination of the upper end sail portion 60 with respect to the sail 10 can be adjusted by acting on the cable or rope 81 connected to the control device 80. This inclination can be adjusted in either direction, depending on whether the sailing boat is sailing on the starboard or port tack. Figure 3 shows that the upper end portion 60 is not in alignment with the remaining part of the sail, but is inclined laterally.
A specific embodiment of the invention has been described here; as will be evident to a person skilled in the art, innumerable variants and modifications of what has been described (in terms of shape, dimensions, arrangements and parts with equivalent functions, for example) may be devised without departure from the scope of the invention as shown in the attached claims. In particular, the invention may equally well be applied to a sail of the wingsail type.
Claims
1. Triangular sail for a vessel, comprising an upper end sail portion (60) connected to the remaining part of the sail (10) through a hinge (70) extending in the direction (F) of air flow with respect to the sail, said upper end sail portion thereby being movable in a laterally swivelling manner with respect to the remaining part of the sail (10), said sail being characterized in that the hinge (70) is positioned between a lower end of the upper end sail portion (60) and an upper end of the remaining part of the sail (10).
2. Sail according to Claim 1, comprising a rotary control device (80) arranged at an end of the hinge (70) and provided for controlling the rotation of the upper end sail portion (60) with respect to the remaining part of the sail (10).
3. Sail according to Claim 1, further comprising a cable or rope (81) associated with the rotary control device (80) for controlling the rotation of the upper end sail portion (60).
4. Sail according to Claim 3, further comprising one or more guide members (82) arranged on opposite sides of the sail for guiding respective lengths of cable or rope (81).
5. Sail according to any of the preceding claims, said sail being a wingsail.
6. Sail according to any of Claims 1 to 4, said sail being of flexible material and said upper end sail portion comprising a stiffening/supporting element (61) positioned at a vertical side thereof.
7. Sail according to Claim 6 as combined with Claim 2, wherein the stiffening/supporting element (61) of the upper end sail portion (60) is positioned so as to be rota- tionally fixed to the rotary control device (80).
8. Sail according to Claim 6 or 7, further comprising a stiffening/supporting headboard (40) secured to the sail and provided for attachment of a halyard (50), wherein said hinge is partially supported by the stiffening/supporting headboard (40).
9. Sail according to Claim 8 as combined with Claim 2, wherein said rotary control device is supported by the stiffening/supporting headboard (40).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITTO2015A000025 | 2015-01-13 | ||
ITTO20150025 | 2015-01-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2016113657A1 true WO2016113657A1 (en) | 2016-07-21 |
Family
ID=52597192
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB2016/050099 WO2016113657A1 (en) | 2015-01-13 | 2016-01-11 | Triangular sail for a boat, having a swivelling winglet |
Country Status (1)
Country | Link |
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WO (1) | WO2016113657A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT201800005855A1 (en) * | 2018-05-30 | 2019-11-30 | Diego Morani | OPTIMIZATION WINGLET OF THE LOAD OF A SAIL OF A SAILBOAT |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3403653A (en) * | 1967-02-15 | 1968-10-01 | Bush Harold | Sails |
FR2818613A1 (en) * | 2000-12-26 | 2002-06-28 | Gilles Bodergat | Wind propulsion system for boats and vessels of all types comprises sails made horizontal shutters controlled by pulleys and cables in mast |
FR3001437A1 (en) * | 2013-01-29 | 2014-08-01 | Gilles Bruno Serre | System for progressive reduction/increase of rigid sail surface on sailboat in e.g. maritime transport field, has sail segments rotating in horizontal plane around axis located in its medium so as to provide surface when segments are active |
-
2016
- 2016-01-11 WO PCT/IB2016/050099 patent/WO2016113657A1/en active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3403653A (en) * | 1967-02-15 | 1968-10-01 | Bush Harold | Sails |
FR2818613A1 (en) * | 2000-12-26 | 2002-06-28 | Gilles Bodergat | Wind propulsion system for boats and vessels of all types comprises sails made horizontal shutters controlled by pulleys and cables in mast |
FR3001437A1 (en) * | 2013-01-29 | 2014-08-01 | Gilles Bruno Serre | System for progressive reduction/increase of rigid sail surface on sailboat in e.g. maritime transport field, has sail segments rotating in horizontal plane around axis located in its medium so as to provide surface when segments are active |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT201800005855A1 (en) * | 2018-05-30 | 2019-11-30 | Diego Morani | OPTIMIZATION WINGLET OF THE LOAD OF A SAIL OF A SAILBOAT |
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