WO2005028302A1

WO2005028302A1 - Sailing vessel

Info

Publication number: WO2005028302A1
Application number: PCT/NL2004/000647
Authority: WO
Inventors: Nanne Jan Johan Drost
Original assignee: Nanne Jan Johan Drost
Priority date: 2003-09-19
Filing date: 2004-09-20
Publication date: 2005-03-31
Also published as: NL1024335C2

Abstract

A sailing vessel with a hull and at least one mast which extends, in a condition of rest, from the hull structure in a vertical plane in sailing direction, wherein said mast is arranged for carrying at least one sail with a luff which extends substantially in said vertical plane. A beam arranged for carrying at least one sail with a luff stretched along it is pivotally connected with an upper part of the mast and operatively extends from the upper part of the mast downwards and away from the mast.

Description

Title: Sailing vessel

The invention relates to a sailing vessel with at least one vertical mast for setting at least one sail thereon.

A known problem occurring with such vessels is that, in particular with beam reach and upwind courses, the wind exerts an inclining moment on the ship, which makes it necessary to adjust the sail setting at higher wind speeds. For this purpose, the sail surface is usually reduced. However, this also limits the speeds that can be reached.

Vessels are known where the inclining moment is limited or eliminated by use of a sail inclining towards the weather side of the ship. Such a vessel is known from international patent application W091/187788. In this vessel, the inclining moment exerted by the wind on the vessel is limited or eliminated in that the line of action of the total forces exerted by the wind on the rigging runs more closely along the hull lateral point (the place where the line of action intersects with the centre longitudinal plane of the ship) than in a conventional vessel. In addition, the vertical component of the total of the forces exerted by the wind can be utilized to lift the vessel slightly out of the water, so that the resistance experienced by the vessel in the water decreases.

A drawback of a vessel with such a rigging is that it is relatively slow when there is little wind.

It is an object of the invention to provide a solution which enables a vessel to develop relatively high speeds at high wind speeds, but to reach higher speeds and have better sailing properties at low wind speeds than known vessels with sail setting inclining to weather side. For this purpose, according to the invention, a sailing vessel according to claim 1 is provided. Because, dxiring sailing, the sail inclining to weather side is set along a beam which extends from a coupling onto a mast, which, as is conventional, extends in a vertical longitudinal plane of the ship and is arranged for carrying one or more sails with the luff in this longitudinal 5 plane as well, the possibility has been obtained to also set a conventional sail with luff or luffs in the vertical longitudinal plane of the ship, instead of or in addition to the sail set on the beam inclining to weather side. Thus, at relatively low wind speeds, a more efficient sail setting with a large effective sail surface can be obtained. 0 Embodiment aspects of the invention are set forth in the dependent claims.

In the following, the invention is further elucidated with reference to the Figures in the appended drawing, in which diagrammatic views are perspectively shown, in which: 5 Fig. 1 shows an example of an embodiment of a sailing vessel according to the invention;

Figs. 2A and 2B show an example of a connection used in the sailing vessel of Fig. 1 between a guide bracket extending around a mast and a beam outrigger; o Fig. 3 shows a cutaway view of an example of a connection used in the sailing vessel of Fig. 1 between a head of the mast and a head of the beam;

Fig. 4 shows a cutaway view of an example of interior parts of the mast; 5 Fig. 5 shows a cutaway view of an example of interior parts of the mast of the sailing vessel of Fig. 1 at the lower end of the mast; and

Fig. 6 shows an example of a main sheet and a vang for a boom of a mainsail onto the mast of the sailing vessel according to Fig. 1.

As appears most clearly from Fig. 1, the vessel according to the o exemplary embodiment of the invention shown has a hull structure with a main hull 5 and floats 17. On the main hull 5 stands a mast 1 with staying 8 between the main hull 5 and attachment points on the mast at a distance above the main hull 5.

In a condition of rest, the mast 1 extends from the hull structure 5, 17 in a vertical plane in sailing direction. The mast 1 is arranged for carrying sails 12, 13 with a luff extending substantially in this vertical plane. In addition, on the mast, an extra headsail such as a spinnaker or, like in this example, a genaker 14 can be hoisted.

With the mast 1, a beam 2 is connected which is arranged for carrying at least one sail 10 with a luff stretched along it, which beam is pivotally connected with the head of the mast. In the operative condition shown, the beam 2 extends from an upper part of the mast 1 obliquely downwards and away from the mast 1.

Around the nαast 1 and staying 8 runs a guide bracket which is, according to this example, designed as a ring 3. The ring 3 is suspended by means of guides 21 which are, according to this example, provided with guide wheels. The guides 21 may, for instance, be attached on the deck of the main hull 5, but are, according to this example, attached to lower crosstrees 20 which are connected with the mast 1. The guides are preferably each provided with at least three wheels for enclosing the guide bracket 3 (Fig. 2A) upwards, downwards and sidewards. For this purpose, the wheels are, according to this example, located on the inside, top side and outside of the ring. The ring 3 can thus rotate, preferably over 360 degrees, while parts attached to the outside of the ring rotate or pivot along with the ring. Instead of as a rotatable ring or rotatable ring segment, the guide bracket may also be designed as a rail over which a carriage can run, to which at least the first part of the telescopic beam outrigger 4a is attached. It may also be provided that several of such carriages are, guided by the bracket, movable around the mast. To the ring 3, a telescopic beam outrigger 4 is attached, whose free end is attached, at a distance from the mast 1, to the beam 2. With the beam outrigger 4, the beam 2 is kept at an angle with respect to the mast 1 during sailing. According to this example, the beam outrigger 4 is telescopic and consists of a first part 4a and a second part 4b. The first part is attached to the ring 3 so as to hinge about a horizontal axis (Fig. 2B). The part of this hinge attachment which is fixed with respect to the ring 3 is attached on the outside of the ring 3 but formed such that the pivotal axis of the attachment is located outside and, at least over a distance equal to half of the vertical diameter of the first part of the telescopic beam outrigger, below the ring. In the first part 4a, the second part 4b is received, which is attached to the beam 2 by its end. Viewed from the ring 3, this attachment of the second part 4b to the beam 2 consists of, first, a hinge connection with a horizontal axis perpendicular to the beam outrigger, and then a hinge connection with an axis parallel to the beam. There is space between the two parts of the beam outrigger so that lines and possibly, with deceleration of the lines, pulleys can run between the two parts.

The retracting and extending of the second part 4b in the first part 4a is guided by at least three rollers 42 at the end of the first part 4a and at least three rollers (not visible in the drawings) at the end of the second part 4b which is received in the first part 4a. In order to retract the second part 4b so far that it projects from the first part 4a near the ring 3, at least three rollers are also present at the end of the first part 4a near the ring 3, which rollers are circumferentially placed such that the rollers of the second part 4b placed near the ring 3 cannot contact the rollers of the first part 4a. In order to prevent rotating of the second part 4b with respect to the first part 4a, a rail may be attached on the inside of the first part 4a and/or on the outside of the second part 4b, which rail cooperates with a groove or other guide in the other of the two parts 4a, 4b. In order to facilitate sliding of the rail through the groove, it may optionally be provided with ball bearings or rollers.

Extending the beam outrigger 4 takes place with the aid of a line (not visible in the drawings) running from the end of the second part 4b near the ring 3, through the space between the first part 4a and the second part 4b, to the free end of the first part 4a and then running via a pulley, outside of the first part 4a, to the end of the first part 4a located proximate to the ring 3. Retracting takes place by means of a line 26 running from the free end of the second part 4b outside of the two parts of the beam outrigger 4 to the fixed end of the first part 4a. The free ends of the two lines described herein may be connected with each other.

The beam outrigger 4 is attached to the ring 3 in such a manner that, upon complete retraction of the second part 4b of the beam outrigger 4, this part runs right along the mast 1. With the aid of an adjustable staying 27 between the free end of the first part 4a and attachment points on the ring 3 at a distance on both sides of the coupling 22, the angle at which the beam outrigger 4 projects from the ring 3 can be changed and fixed.

According to this example, the head of the beam 2 is attached to the head of the mast 1. To this beam 2, the end of the beam outrigger 4 is attached. So, by retracting and extending the beam outrigger 4, the angle between the mast 1 and the beam 2 can be adjusted. For this purpose, the heads of the mast 1 and the beam 2 are connected to each other such that the beam 2 is pivotable with respect to the mast about a shaft 31 directed substantially horizontally and perpendicular to the beam 2 and about a substantially vertically directed shaft. In order to facilitate rotating about the substantially vertical shaft, according to this example, the construction is provided with ball bearings 32.

In order to have the beam 2 rotate approximately about its centerline, to support the beam 2 and to also be able to stretch the sail 10 on the beam 2, the beam is provided with fore crosstrees 9a, 9b and side crosstrees 7a, 7b and staying, and a boom, in this example a boom 6 with double design, runs from the front side of the beam 2 above the lower crosstrees 7b to the clew of the sail 10. Between the lower fore crosstrees 9b and the lower side crosstrees 7b and between the end of the lower side crosstrees 7b and the end of the boom 6, a staying is attached which fixes the angles between the crosstrees.

The boom is attached by its head to a carriage which can run over a rail in longitudinal direction of the beam which is attached to the beam 2, on the front side of the beam 2, above the lower crosstrees 7b, 9b. The position of the carriage on the rail is adjustable.

The side crosstrees 7a, 7b on the side or back side of the beam 2 are attached by a hinge connection with an axis in the longitudinal direction of the beam 2. On both sides of the sail 10, from the end of the lower side crosstrees 7b, a line runs via the end of the lower fore crosstrees 9b of the beam and via a pulley to a position on the beam 2 at the height of the attachment of the beam outrigger 4 to the beam 2. By operating these lines, the lower side crosstrees 7b with the staying connected thereto can be folded against the lower fore crosstrees 9b. When the boom 6 has been pivoted to the beam 2 by hoisting the front part, there is sufficient space on the lines between the end of the lower side crosstrees 7b and the back end of the boom. Folding out the lower side crosstrees 7b is done by pulling the front part of the boom 6 down.

The sail 10 has a low center of effort and is struck and reefed by means of systems known per se. The halyards for this run through or along the beam outrigger 4 or through or along the beam 2 and the mast 1.

Rotating" the sail 10 hoisted to the beam 2 approximately about the centerline of the beam 2 is done with sheets 11, which run from the head of the beam 2 and the back end of the boom 6 on both sides of the crosstrees 7a, 7b, 9a, 9b and the staying of the beam 2. One of the two sheets 11 operatively abuts the staying on, viewed from the ring 3, the backside of the sail lO. The sheets 11 run to the end of the beam outrigger 4 near the ring 3 or, to give the headsails 13, 14 more space, to a point on the fixed part 4a of the beam outrigger 4 at some distance from the ring 3. Via a pulley 23, the end of the first part of the beam outrigger 4, and further pulley 24, the sheets 11 run through the space between the first part 4a and the second part 4b of the beam outrigger 4, to the beginning of the second part 4b of the beam outrigger 4. From the beginning of the second part 4b of the beam outrigger 4, the sheets 11 run via a pulley (not visible in the drawings) into the second part 4b of the beam outrigger 4, to the free end of the beam outrigger 4, through or along the beam 2 to the head of the beam 2 and then into the mast 1 (Fig. 3).

Due to this sheet configuration, the sheets 11 providing the rotating of the sail 10 remain under sufficient tension irrespective of the extent to which the beam outrigger 4 is retracted. By feeding the sheets 11 via the head of the mast 1 downwards through the mast 1 and then out of the mast 1, they can operate the beam outrigger 4 and the beam 2 from a fixed position, such as the cockpit, irrespective of the position of the sail 10, and the operated ends of the sheets 11 run from that position in a fixed direction. In the mast 1, a ring 34 is present with the opening facing in the longitudinal direction of the mast 1 (Fig. 4). This ring 34 is attached to a carriage 35 running over a rail 36 attached on the inside of the mast 1 and running in the longitudinal direction of the mast 1. From the cockpit, the ring 34 can be moved upwards with the aid of a line 37 attached to the top side of the ring 34 or carriage, which line runs via a pulley at the top of the rail 36 to the lower end of the mast 1 and from there to the cockpit or another place where it is to be operated (Fig. 5). On the bottom side of the ring 34 or the carriage 35, a line 43 is likewise attached. This line runs directly to the lower end of the mast 1 and then to the cockpit. With this, the carriage 35 can be pulled down with the ring 34. The two lines 37 and 43 described herein can be connected with each other at the ends where they are operated and thus be made endless.

In the ring 34, a disc 33 is present which is bearing-mounted with respect to the ring 34 by means of ball bearings (Fig. 4). This disc 33 has a non- round, for instance square hole through which a section 28 fitting in the hole with little interspace has been inserted which runs up to the head of the mast 1 and is there connected to the part 29 of the mast 1 which rotates along with the beam 2 when it rotates about the mast 1. Because the hole has been formed identically to the cross section of the section 28 and because the disc 33 encloses the section 28 with httle interspace, the disc 33 rotates along with the section 28. The disc 33 can, however, move freely up and down with respect to the section 28. In order to facilitate this, the contact surface between the section 28 and the disc 33 is optionally bearing-mounted or provided with rollers. The section may also be enclosed by rollers without a hole which is formed identically to the cross section of the section 28 being present in the disc 33. On the top side of the disc 33, one of the sheets 11, which, as described hereinabove, run via the head of the mast 1, is attached. The other sheet 11 runs through a hole in the disc 33 to the lower end of the rail 36 and the section 28 and then via a pulley to the bottom side of the disc 33, where it is attached. By operating these sheets, the sail 10 can be pivoted approximately about the centerline of the beam 2.

This system allows, irrespective of the movements or the position of the beam outrigger 4 with respect to the vessel, fixation or adjustment of the position of the beam 2 and the sail 10 with respect to the beam outrigger 4 and its operation from the cockpit without the lines becoming entangled. By installing several of such systems above one another in the mast, for instance other lines along the beam 2, for instance for hoisting and striking the sail on the beam or retracting and extending the telescopic beam outrigger, can be operated from the cockpit. If and insofar the section cannot be made long enough for several of such systems due to the limited length of the mast, the sheets or halyards attached to the disc can be accelerated and those attached on the carriage or ring be decelerated. For one acceleration or deceleration, respectively, a given operating range of the sheet or the halyard requires a movability of the carriage over the section which is half as long.

In order to have the sail 10 stand stably at a correct approach angle with respect to the wind on one side of the vessel, the line of action resulting from the forces on the sail 10, the beam 2 with staying and the beam outrigger 4 is, when fully catching the wind, to run through the sail 10, behind the mast 1. In order to prevent the angle between the sail 10 and the beam outrigger 4 from becoming too small, so that the line of action of this resulting force runs along the front of the mast, a line can be stretched from the lower fore crosstrees 9b to the beam outrigger 4. In order to prevent the beam outrigger 4 from rotating too far forwards so that the sail 10 starts to shiver, a sheet 30 runs from an attachment point on the hull structure via a pulley at the free end of the beam outrigger 4 to the head of the mast 1, through the disk 33 and possibly through the section 28, and it runs near the lower end of the mast 1 out of the mast 1 (Pig. 5) and to the cockpit.

The attachment point of the sheet on the hull structure is adjustable, in that it is mounted on a line going round over the main hull 5 and around at least the mast with the associated staying, which line runs over pulleys which are open on the outside so that the sheet 30 attached thereon can go all round. The circular line can be guided round and be fixed in the cockpit. This manner of line configuration allows unlimited jibing and tacking, carried out from the cockpit without sheets getting entangled around the mast or around each other. With quarter-wind courses, according to this example, the attachment point of the sheet 30 can be transferred to a line going round between the side float and the main hull. Thus the attachment point of the sheet 30 can be brought to a side float.

The beam 2 is longer than the vertical mast 1, but the beam 2 is short enough not to touch the water, if directed to the stern of the main hull 5. The staying of the mast 1 is placed such that, upon hauling in the beam 2 on the backside of the main hull, the fore crosstrees 9a, 9b of the beam 2 fall between the after crosstrees of the mast 1.

With little wind, the beam outrigger 4 may be hauled in. The moment which makes the ship incline is small with httle wind and the lifting component of the sailing force is then too weak to really lift the vessel out of the water and thus contribute to the speed. So, a more vertically positioned sail 10 is more effective then. Also, a conventional rigging can be hoisted on the mast 1. Upon jibing, the headsails 13, 14 including any forestay present outside the ring is reefed or hauled into the ring. Fig. 6 shows a main sheet 45 passing inside the ring and vang 44 for the boom 39 of the main sail 12 to the mast 1. The main sheet 45 runs through pulleys on a traveler carriage which is mobile to and fro over a traveler rail. By pulling the carriage to weather side, the main sheet 45 may run at a large angle with the vertical, while the boom is kept down by the vang (vang sheeting). The sheet 45 itself runs along the boom 39 and via the mast 1 to the cockpit. Because the main sheet 45 passes inside the ring 3, upon tacking, the beam outrigger can freely rotate behind the mast and below the boom. In order to let, upon tacking, the beam rotate freely behind the mast with a main sail with extended head and/or leech, more space can be created by extending the connecting structure between the mast and the beam in at least the horizontal direction.

When the sail 10 has been reefed on the beam 2, the line of action of the sailing force is lowered. Depending on the conditions, the beam outrigger 4 can be hauled in when the magnitude of the capsizing moment allows this. The two relatively short and wide side floats 17 are each coupled to the main hull 5 with a single wide beam 18. The beams 18 rotate at the location of the main hull over the deck or deck level about an axis which is placed further inwards than usual. In order to make the connection 5 sufficiently strong, there needs to be sufficient contact surface in all directions with respect to the axis between the deck and the beam 18. If a saloon is present there, then a recess for the beam 18 may be provided in the saloon. In line with the axis of the beam attachment to the main hull 5, abutting the wall of the main hull, a beam support is attached which is, by0 its other end, attached to the lower side of the beam 18 and can rotate along with the beam. This ensures that suspension of the side floats 17 can resist sufficient upward forces.

In order to keep the beam 18 backwards outside the main hull upon folding in, a bend has been provided in the beams 18. This bend is, 5 according to this example, directed forwards -inwards with folded-out beams.

The connection between the beams 18 and the side floats 17 also has sufficient contact surface in all directions with respect to the axis, to make the connection sufficiently strong in all directions.

To ensure that the side floats end up sufficiently low when folding in, o which promotes the stability of the vessel, the axis of the attachment between side float and beam, and the axis of the attachment between beam and main hull may possibly be oriented so as to be inclined backwards.

In order to keep the side floats 17 parallel to the main hull with any extent of folding in or out, a line 19 has been stretched from a point of the5 side float for the coupling to the associated beam to an arm 15 projecting sidewards from the main hull 5 at some distance behind the bow, such that the line 19 forms a parallelogram together with the virtual line between the two axes of the beam 18. This projection may also serve as a "bow wing" via which a line runs for bringing the bowsprit 16 for the genaker 14 to weather o side, to increase the speed on quarter-wind courses and in particular with crossing downwind. Also, to the backside of the side float, a hne is attached which forms a parallelogram together with the virtual Hne between the axes of the beam.

It is noted that, after the foregoing, various modifications are possible within the scope of the invention as defined in the appended claims.

Claims

1. A sailing vessel with a hull structure which extends in the sailing direction, comprising: at least one hull (5) and at least one mast (1) which extends, in a condition of rest, from the hull structure in a vertical plane in sailing direction, wherein said mast (1) is arranged for carrying at least one sail (12) with a luff extending substantially in said vertical plane, and at least one beam (2) arranged for carrying at least one sail (10) with a luff stretched along it, which beam (2) is pivotally connected with an upper part of the mast (1) and operatively extends from said upper part of the mast (1) downwards and extends away from the mast (1).

2. A sailing vessel according to claim 1, wherein the beam (2) which is pivotable about an axis directed substantially horizontally and perpendicular to the beam (2), about a substantially vertically directed axis and about an axis which approximately coincides with the beam itself is connected with the mast (1).

3. A sailing vessel according to claim 1 or 2, further comprising a beam outrigger (4) and a guide bracket (3) which extends at a distance from the mast (1) over at least a certain angular range around the mast (1), wherein the beam outrigger (4) operatively extends between the beam (2) and the guide bracket (3), for keeping the mast (1) at a distance from a lower part of the beam (2), wherein the guide bracket (3) guides an end part of the beam outrigger (4) located most closely to the mast (1) for moving according to a path around the mast (1).

4. A sailing vessel according to claim 3, wherein the beam outrigger (4) has a telescopic design, there is space between the parts received in each other through which lines run, and the beam outrigger (4) is provided with rollers (24) for guiding the retracting and extending of the beam outrigger (4).

5. A sailing vessel according to claim 3 or 4, wherein the guide bracket (3) is designed as a ring which extends in a plane and which is rotatably suspended in said plane about its center and about the mast (1) and wherein the beam outrigger (4) is connected with the guide bracket (3) at a position which is rotatable along with the guide bracket (3).

6. A sailing vessel according to claim 5, wherein the sheet configuration (45) of the sail (12) attached to the mast (1) passes inside the ring.

7. A sailing vessel according to claim 5 or 6, further comprising a guide of the ring (3) with at least three sets of each at least three rollers (21) distributed in circumferential direction in fixed positions with respect to the hull of the vessel, for guiding the ring, wherein the rollers of a first of said sets are located on the top side of the ring, the rollers of a second of said sets are located on the bottom side the ring and the rollers of a first of said sets are located on the inside of the ring.

8. A sailing vessel according to claim 3, wherein the guide bracket is designed as a rail with a carriage freely mobile over it to which the interior part of the telescopic beam outrigger is attached.

9. A sailing vessel according to any one of claims 3-8, wherein the sheet configuration (45) of the main sail (12) attached to the backside of the mast (1) passes inside the ring.

10. A saihng vessel according to any one of claims 3-9, wherein stays connected with the mast (1) extend inside the ring (3).

11. A sailing vessel according to any one of the preceding claims, further comprising at least one boom (6) which extends from the beam (2) and has, on a side facing the beam, an end adjustable along the beam (2), staying on at least the front side and lateral sides of the beam (2), and crosstrees (7a, 7b, 9a, 9b) which extend from the beam (2), wherein crosstrees located on lateral sides are foldable towards the staying on the front side of the beam (2).

12. A sailing vessel according to any one of the preceding claims, further comprising sheets (11) which at least extend from at least one position on a boom (6) at a distance from the beam (2), along or through the beam (2) and from the head of the mast (1) through or along the mast (1).

13. A sailing vessel according to claim 12, wherein the sheets (11) run to a sheet leading point on the beam outrigger (4) at a distance from the beam (2) and from said point through or along the beam outrigger (4) to the beam (2).

14. A sailing vessel according to claim 4 and 13, wherein the sheets (11) run from a sheet leading point on the part (4a) of the beam outrigger (4) attached to the ring (3) to the end of this part of the beam outrigger, and continue from said sheet leading point between the parts of the beam outrigger and then, through the part (4b) of the beam outrigger which attached to the beam (2), to the beam.

15. A saihng vessel according to claim 13 or 14, wherein the sheets (11) run from the beam outrigger (4) via the head of the beam (2) and the head of the mast (1) into the mast, wherein one of two sheets (11) runs directly to the upper side of a disc, further comprising a non-round section (28) which runs in the longitudinal direction of the mast (1) and is connected with the beam, such that rotating the beam about the mast results in rotating the section, wherein the disc unrotatably encloses said section for rotating along with the section and the beam, and is movable in the longitudinal direction of the section, and wherein the second sheet runs via a pulley at the bottom of the section to the lower side of the disc.

16. A sailing vessel according to claim 15, wherein the disc is enclosed by a ring (34) by means of ball bearings and this ring is attached to a carriage (35) which is movable over a rail (36) which is located on the inside and in the longitudinal direction of the mast (1), wherein two sheets are attached to the carriage, of which a first sheet (43) runs directly to the lower end of the mast and runs from the lower end of the mast to an operating position for pulling down the carriage and wherein a second of said sheets (37) runs via a pulley on the upper side of the rail (36) to the lower end of the mast and from the lower end of the mast to an operating position for pulling up the carriage, wherein said sheets are preferably circularly connected with each other.

17. A sailing vessel according to claims 15 and 16, comprising at least two assemblies located above each other of said discs and or carriages connected with the same non-round section.

18. A saihng vessel according to any one of the preceding claims, further comprising a sheet (30) which runs from an attachment point on the hull structure via the free end of the beam outrigger (4) to the head of the mast (1) and along or through the disc (33) or the section (28) to an operating position.

19. A sailing vessel according to claim 18, wherein the attachment point of the sheet (30) is adjustable on the hull structure, in that it is mounted on a hne going round over the main hull (5) around at least the mast with the associated staying, which line can be led through and fixed.

20. A sailing vessel according to any one of the preceding claims, further comprising two side floats (17) which are each coupled to the main hull (5) with a single beam (18), wherein the beams (18) are rotatable, at the location of the main hull, over the deck or deck level, about a substantially vertical axis, wherein the beams (18) are provided with a bend which is, in the folded-out beams (18) directed forwards -inwards.

21. A sailing vessel according to claim 20, wherein, in front of and behind each of the beams (18), lines (19) are stretched which run parallel with respect to the virtual lines between the axes of the associated beam (18).