EP0158117B1 - Rigging for a sailing board - Google Patents

Description

The invention relates to a rig for a windsurf board with a mast, a sail held by the mast and held open by means of a boom, which receives the mast in a luff pocket forming the luff, the unstained relative to the windsurf board, freely rotatable on all sides by means of a joint, and The rig is pivotally attached to the windsurfing board by the user on the boom and is thus adjusted relative to the wind and the windsurfing board, the sail being connected to the boom only via its nock, the lower leg of the sail extending obliquely from the nock down to the mast and the boom is arranged above the sail neck, and the boom has two outwardly curved trees and a bow fitting that can be attached to the mast and a rear fitting for holding the clew, the trees being connected to one another by bow and stern fittings.

Such rigs for windsurf boards are generally known. After the recent development of windsurfing, it has been found that in particular every gram of weight in the area of the rear fitting of such a boom is disadvantageous for handling the rigs. At the same time, however, it has also started to sail different cuts for different board constructions and in particular different wind conditions. The usual booms have a fixed length, which corresponds to the largest sail. If smaller sails are sailed, there is a corresponding overhang, which increases the disadvantageous influence of the weight on the stern fitting by extending the lever. Usually, with such rigs, slip clamps, deflection rollers and similar fittings are attached in the area of the rear fitting, since in the usual shape of the rig the clew is attached to the end of the boom by a rope, which enables trimming in the direction of the rear fitting. In order to reduce the disadvantageous leverage effect on the overhang of the rear boom fitting beyond the clew, so-called Vario booms have also been proposed (cf. European patent application 00 71 220), by means of which the overall length of the boom can always be adapted to the corresponding sail size.

From DE-A-26 03 256 a rig of the type specified above is also known, in which an influence on the sail tension is possible via the connection between mast and boom. In this known construction, an additional setting for the sail tension is created here. The sail tension is additionally changed by adjusting the distance between the mast and bow fitting, this distance being adjusted by means of a knurled nut on a thread which is provided on a bolt which protrudes from the bow fitting at the front in the rigged position of the known rig. The bolt forms part of a fitting part that is firmly connected to the mast. This additional adjustment option is only available after the sail has been rigged in the usual way.

In all known rigs, however, there is always a distance between the outermost rear end of the rear boom fitting and the clew, for technical reasons alone, since there must be some leeway for trimming the sail by moving the clew in the direction of the rear end. To make matters worse, according to the tendency that the more modern sails are cut ever flatter and harder masts are used, a complete trimming and tensioning of the sail is only possible with almost no effort. In this regard, it has helped to provide different translations and pulley-like arrangements in the rear fitting or in a combination of the rear fitting and clew. This increases the weight even more precisely in the area of the rear fitting.

Based on this background, the invention has for its object to provide a rig of the type mentioned, in which the sail can be trimmed with the least effort, it being possible to produce a minimum and constant distance of the clew from the rear end of the boom, so that thereby straight a very light design, especially in the rear boom section is possible.

This object is achieved essentially by the features specified in claim 1.

Further advantageous details are given in the subsequent subclaims.

This basic embodiment according to the invention has the particular advantage that, according to the present sail cut or sail size, the clew can first be fastened in the stern fitting in accordance with the optimum trim without any force or with minimal sail tension. The clew then forms a pivot axis of the boom, the total length of the boom forming the lever arm for the pivoting movement of the boom itself from the top of the mast down to the end position. The elements for fixing the boom in the end position consist of a coupling device that is effective between the bow fitting and the mast. Completely deviating from the prior art, the path is followed here that the preprogrammed trim is produced without power and on closing the sail is tensioned and optimally trimmed using a considerable lever arm.

In a particularly preferred development according to the invention, the additional adjustment possibility of the sail tension known per se from DE-A-26 03 256 can additionally be provided, in that the connection mentioned between the mast and the boom is designed in such a way that for fine-tuning the per se trimmed sail the mast can be pushed back and forth in the longitudinal direction of the boom.

It is evident that the present invention takes a completely different approach by not trimming the sail anymore by moving the clew towards the boom, but instead by the last trim of the sail by moving the mast towards the bow fitting he follows. This makes it possible to relieve the rear fitting of the boom from all fittings, so that it can be made extremely easily. In addition, the invention also offers the advantage that the clew of the sail can be arranged directly in the rear fitting of the boom, so that any unfavorable overhang is avoided.

In an advantageous development according to the invention, the connection between the mast and boom is designed as a three-point bearing, which holds the mast by friction. This embodiment has the advantage that the boom can be adjusted to any desired height.

The three-point bearing preferably has friction pieces which are in contact with the mast or the mast pocket of the sail.

In this context, it is particularly preferred to design at least two of the friction pieces as rollers, whose axes of rotation are approximately parallel to the mast.

In the case of the rig according to the invention, a further preferred embodiment is that the sail is formed with a continuous mast pocket and that the frictional engagement is established with the outside of the mast pocket. This has the particular advantage that the aerodynamic recess, which known sails have, in order to enable the boom to be fastened, is avoided.

In particular, it is preferred to arrange two bearing points symmetrically laterally behind the mast, the distance between the bearing points being somewhat smaller than the diameter of the mast and the third bearing point being arranged in the central axis of the boom in front of the mast. As a result, the wing profile of the sail beginning through the mast pocket is hardly impaired, since the constriction caused by the two lateral bearing points is kept to a minimum.

The third bearing point is preferably designed to be resilient in the longitudinal direction.

To trim the sail, it is advantageous that the bearing points are adjustable in the longitudinal direction of the boom by actuators arranged in the bow fitting.

In order to take into account different boom heights depending on the size of the user, the bearing points should advantageously be designed to be pivotable.

In particular, it is particularly preferred that the mast has a teardrop-shaped or double airfoil-shaped cross-section, and that the point of application of the third bearing point is suspended on both sides perpendicularly to the center line of the boom, such that the mast can carry out a sprung rotary movement about its axis. This embodiment offers the advantage that an optimal trim is possible in the more recent development of the so-called wing rig, and nevertheless the intended swiveling or rotating movement of the mast can be carried out to change the position of the air flow.

In a particularly preferred embodiment, the fitting has a fastening device for holding the clew, which can advantageously be formed by an axis running through the clew.

Here, a preferred embodiment is that the rear fitting is divided and can be connected by a closure.

Specifically, the closure can be formed by the axle firmly connected to one half of the rear fitting and a slide arranged in the other half, which can be snapped into a groove at the free end of the axle.

In modified embodiments, the rear fitting can have a slot which receives the clew, a bore being provided through which the axle can be pushed through the clew.

In particular, the rear fitting should be interchangeable, so that, depending on personal taste, a conventional rear fitting with the trim in the direction of the rear fitting can also be used.

In particular, the invention can be further developed in that the boom in the area of the bow fitting has a bend which enables the boom to be folded down parallel to the mast. This folding is advantageous in order to be able to fold the rig in emergency situations or for transport, whereby this can be done without removing the bearing points of the three-point bearing due to the offset.

• Fig. 1 eine schematische Gesamtansicht des erfindungsgemäßen Riggs ;
• Fig. 2 eine vergrößerte Schnittansicht des Bugbereichs des Gabelbaumes bei dem Rigg gemäß Fig. 1 ;
• Fig. 3 eine Draufsicht auf eine abgewandelte Ausführungsform des Bugbereiches des Gabelbaums ;
• Fig. 4 eine schematische Draufsicht eines Gabelbaumes in einer abgewandelten Ausführungsform ;
• Fig. 5 eine schematische Seitenansicht des Bugbereiches des Gabelbaums in zwei Steilungen ;
• Fig. 6 eine Fig. 5 entsprechende Ansicht einer abgewandelten Ausführungsform ;
• Fig. 7 eine schematische, teilweise geschnittene Ansicht einer Ausführungsform des Heckbeschlags ;
• Fig. 8 eine schematische Draufsicht einer alternativen Ausführungsform des Heckbeschlages ;
• Fig. 9 eine Fig. 7 entsprechende Schnittansicht einer weiteren Ausführungsform des Heckbeschlages ;
• Fig. 10 eine abgewandelte Ausführungsform eines Bugbeschlages in einer Fig. 3 entsprechenden Ansicht ;
• Fig. 11 eine Fig. 3 entsprechende Ansicht des Bugbeschlages bei einem sogenannten Flügelrigg ; und
• Fig. 12 eine skizzenhafte Seitenansicht des erfindungsgemäßen Riggs, welche den Vorgang des Aufriggens und Trimmens veranschaulicht.
• Fig. 13 eine Fig. 1 entsprechende Gesamtansicht einer abgewandelten Ausführungsform ;
• Fig. 14 eine vergrößerte, teilweise geschnittene Ansicht des Bugbeschlags des Gabelbaums bei dem Rigg gern. Fig. 13;
• Fig. 15 eine Schnittansicht von Fig. 14 längs der Linie XV-XV ohne Segel ;
• Fig. 16 eine Fig. 14 entsprechende Schnittansicht einer abgewandelten Ausführungsform ;
• Fig. 17 eine Schnittansicht von Fig. 16 längs der Linie XVII-XVII ;
• Fig. 18 eine Schnittansicht längs der Linie XVIII-XVIII in Fig. 17 ;
• Fig. 19 eine Schnittansicht längs der Linie XIX-XIX von Fig. 17 ; und
• Fig. 20 eine schematische Darstellung einer Ausführungsform des Heckbeschlages 10 für die in Fig. 13 veranschaulichte Ausführungsform des Riggs.

Further advantageous embodiments of the invention result from the following description or the claims and the exemplary embodiments illustrated in the drawings, by means of which the invention is explained below by way of example. In the drawings:

• Figure 1 is a schematic overall view of the rig according to the invention.
• Fig. 2 is an enlarged sectional view of the Bow area of the boom in the rig according to FIG. 1;
• 3 shows a plan view of a modified embodiment of the bow region of the boom;
• Figure 4 is a schematic plan view of a boom in a modified embodiment.
• 5 shows a schematic side view of the bow region of the boom in two divisions;
• FIG. 6 shows a view corresponding to FIG. 5 of a modified embodiment;
• Fig. 7 is a schematic, partially sectioned view of an embodiment of the rear fitting;
• 8 shows a schematic top view of an alternative embodiment of the rear fitting;
• 9 shows a sectional view corresponding to FIG. 7 of a further embodiment of the rear fitting;
• FIG. 10 shows a modified embodiment of a bow fitting in a view corresponding to FIG. 3;
• 11 shows a view corresponding to FIG. 3 of the bow fitting in a so-called wing rig; and
• Fig. 12 is a sketchy side view of the rig according to the invention, which illustrates the process of rigging and trimming.
• FIG. 13 shows an overall view corresponding to FIG. 1 of a modified embodiment;
• Fig. 14 is an enlarged, partially sectioned view of the front fitting of the boom on the rig like. Fig. 13;
• 15 is a sectional view of FIG. 14 along the line XV-XV without sail;
• FIG. 16 shows a sectional view corresponding to FIG. 14 of a modified embodiment;
• Fig. 17 is a sectional view of Fig. 16 along the line XVII-XVII;
• Fig. 18 is a sectional view taken along the line XVIII-XVIII in Fig. 17;
• Fig. 19 is a sectional view taken along the line XIX-XIX of Fig. 17; and
• 20 shows a schematic illustration of an embodiment of the rear fitting 10 for the embodiment of the rig illustrated in FIG. 13.

The embodiments of the rig according to the invention shown in the drawings consist in their entirety of the mast 1, the sail 2 and a boom 3, the rig at the lower end of the mast 2 being connected to the windsurf board 5 by a universal joint 4. The sail 2 is adjusted in the known manner by a user by holding the boom 3 relative to the wind and windsurf board.

As can be seen from FIG. 1, the luff 6 of the sail 2 is formed by a mast pocket 7 which receives and holds the mast 1. The clew 8 of the sail 2 is attached to the nock 9 of the boom 3, which is formed by a rear fitting 10.

In the embodiment illustrated in FIG. 1, the boom 3 has a bow fitting 11, by means of which the mast 1 can be moved forwards and backwards with respect to the boom 3, in order thereby to optimally trim the sail 2. In Fig. 1, the trimming device is generally designated 12 and will be explained in more detail below with reference to the various embodiments.

The boom 3 consists of two outwardly curved trees 13, 14 which are connected to one another at the front by means of the bow fitting 11 and at the rear by means of the rear fitting 10. The bow fitting 11 with the trimming device 12 forms a connection 15 between the boom 3 and the mast 1.

In Fig. 2, a first embodiment of the trimming device 12 is illustrated in a schematic sectional view perpendicular to the mast 1, by means of which the mast 1 can be moved forwards and backwards relative to the boom 3 on its central axis, thereby reducing the tension of the sail 2 and thus the Change trim. In FIG. 2 and also the other figures of the drawings, the same parts have been provided with the same reference numerals, so that reference can be made to the preceding description in this regard.

As can be seen from FIG. 2, the connection 15 between the mast 1 and the boom 3 is designed as a three-point bearing, two bearing points 16, 17 lying somewhat behind the center line of the mast cross-section and the third bearing point 18 on the front of the mast 1. The three-point bearing thus formed has friction pieces 19, 20, 21, which hold the mast 1 or the mast pocket of the sail 2 surrounding it under frictional engagement. It is obvious that in this way the sail 2 can be equipped with a continuous mast pocket 7, which is extremely aerodynamically favorable, since this eliminates the otherwise usual recess in the mast pocket.

As illustrated, the bearing points 16, 17 and 18 are adjustable in the longitudinal direction of the boom 3 by actuators generally designated 22. In the exemplary embodiment according to FIG. 2, spindle drives are provided for this purpose, any other possible type of adjustment being obvious to the person skilled in the art. The drives shown therefore only serve to illustrate the basic principles of the present invention by way of example.

In the embodiment shown in FIG. 2, the mast 1 can therefore be adjusted axially relative to the boom 3, so that the sail 2 can be given any desired tension.

It should also be emphasized that the bearing points 16, 17, 18 and the friction pieces 19, 20, 21 are pivotally mounted in all embodiments, including the embodiment according to FIG. 2, for which purpose joints 23 are provided in the embodiment according to FIG. 2 . The giftable storage ensures that different boom heights are possible. As further illustrated, the preceding bearing point 18 is designed to be resilient, for which purpose a helical spring 24 is provided in the exemplary embodiment. This cushioning absorbs shocks that could otherwise break the mast 1.

As can be seen from FIG. 2, the distance between the two bearing points 17 located behind the mast 1 is such that the distance between the bearing points 16, 17 from one another is somewhat smaller than the diameter of the mast 1. As a result, the mast pocket 7 is hardly constricted, which is part of the wing profile of sail 2.

In the embodiment according to FIG. 3, the third bearing 18 is designed as a roller 25 which is rotatably mounted on an axis 26 transversely to the mast 1. This embodiment facilitates the rigging, which is explained in more detail below. Furthermore, the three bearing points of the three-point bearing are connected to a common actuator 22 so that only this actuator has to be actuated to trim the sail 2.

In the embodiment according to FIG. 4, the bearing points 16, 17, 18 are designed as rollers 27, 28, 29, whose axes of rotation are approximately parallel to the mast 1. The rollers 27, 28, 29 serving as friction pieces simultaneously provide their pivotable mounting.

Fig. 4 also shows sketchy that in all embodiments, the clew 8 can be fixed in the rear fitting 10 of the boom 3, since the trim of the sail 2 takes place in the bow fitting 11 of the boom 3. Details of this fixation will be discussed further below.

5 and 6, another advantageous detail of the rig according to the invention is illustrated in two exemplary embodiments, which makes it possible, despite the three-point mounting, that the boom 3 can be folded parallel to the mast 1 in emergency situations or for transport. As shown in the two figures, in each of which the dashed lines illustrate the folded position, the boom 3 has an offset 30 which, when folded over, disengages the bearing points from the mast 1. This also ensures that the force applied to the boom 3 pulling forces is favorably higher on the mast 1.

In Fig. 5, a lower extension 31 is shown as a further alternative, the two rear adjustable bearing points 16, 17 being arranged in this extension, as indicated by the arrow 32.

In FIGS. 7 to 9, a fastening device, generally designated 32, for holding the clew 8 of the sail 2 in the rear fitting 10 of the boom 3 is shown in three different embodiments.

Since it is obvious from the above description that the clew 8 can be held stationary in the rear fitting 10, in the embodiment according to FIG. 7 the boom 3 is of divided construction, so that the rear fitting 10 has two halves 33, 34. On the lower half 33 in FIG. 7 there is an axle 35 which is fixedly connected to it and which is guided through the thimble 36 of the clew 8. The axis 35 extends through a bore 37 in the upper half 34 of the rear fitting 10 and has a groove 38 at its free end. To close the rear fitting 10, a slide 39 is provided which can engage in the groove 38 in a fork-like manner. With this arrangement, both the boom 3 is closed and the clew 8 is held securely and directly in the free end of the boom 3.

In the embodiment according to FIG. 8, the rear fitting 10 is provided with an indentation 40 through which the axis 35 is guided by means of bores (not shown). Here, too, the clew is located directly in the rear fitting 10.

In the embodiment according to FIG. 9, the rear fitting 10 has a slot 41 for receiving the clew 8, and the axis 35 is formed by a so-called ball lock pin 42, which can be released by pressing a button 43. The ball lock pin 42 is passed through bores 44 and through the thimble 33 of the clew 8 and holds it securely in the rear fitting 10. In the exemplary embodiment according to FIG. 9, the bores 44 open into lateral recesses 45 in the rear fitting 10 in order to avoid the risk of injury, since these Recesses 45 the protruding parts of the axis 35 are received.

Fig. 10 shows in a sketchy representation an alternative form of connection 15 between mast 1 and boom 3, which is designed in the manner of double scissors, so that the frictional engagement on the mast 1 or mast pocket 7 is increased with increasing tension on the sail 2. The advantage of this embodiment is the simple structure and the fact that a single actuator 22 can be used.

11 shows in a sketchy representation the application of the basic principles of the present invention to a so-called wing rig, in which the mast 1 has a teardrop-shaped or double supporting profile cross section.

In this embodiment, the point of application 46 of the foremost bearing 18 of the three-point bearing is spring-mounted on both sides perpendicular to the center line of the boom 3 by means of coil springs 47, 48 or elastic bands, so that the mast 1 can perform a sprung rotary movement about its axis. This modification of the rig according to the invention is advantageous for the application of a wing rig, in which the angle of attack of the mast 1 and thus of the sail profile can be changed.

In Fig. 12 the process of initial trimming or rigging is still sketched. As shown, after that Clew 8 is connected to the rear fitting 10 by the axis 35, the boom 3 is first pivoted downward into the desired location. As a result, the sail 2 is already tensioned by bending the mast 2. The fine trim is then carried out at the height desired for the user by means of the devices described above.

In this regard, there is an optimal setting for each special sail, which in turn depends on the height of the boom 3. Appropriately, scales 49 and 50 are provided on the mast pocket 7 and the boom 2, which represent the respectively optimal position. The division of the scales 49 and 50 is chosen such that, given the height position of the boom 3 on the scale 50, only the corresponding setting on the scale 49 has to be made.

The embodiments illustrated in FIGS. 13 to 20 differ from the previously described embodiments in that the connection 15 between the mast 1 and the boom 3 is designed differently in that no adjustment option for trimming the sail 2 is provided here. Instead, the clew 8 is fixed according to a scale 70 provided, for example, on the rear fitting 10 of the boom 3 in an optimal position with respect to the rear end of the boom 3, and then the sail 2 is tensioned and trimmed by the boom 3 according to FIG. 12 from the top the sail 2 is pivoted down. For this purpose, the boom can then be fixed relative to the mast 1 in the end position reached.

In the embodiments illustrated in FIGS. 13 to 20, a coupling device 51 which is effective between the bow fitting 11 and the mast 1 is provided for this purpose.

Details of an embodiment of this coupling device 51 are illustrated in FIGS. 14 and 15, the same reference numerals being used for the same parts in FIGS. 13 to 20 as in the above description.

As shown, the coupling device 51 consists of two parts, namely a manually detachable latch device 52, which is fastened to the mast 1 in a height-adjustable manner, and a catch or latching device 53, which is mounted in the bow fitting 11.

The pawl device 52 is provided on the top of the actual, pivotally mounted pawl 71 with a cam surface 54, by means of which the pawl 71 is deflected against the pressure of a coil spring 72, which pretensions the pawl 71 in the closed position. In the embodiments shown, the cam surface 54 is shaped in such a way that the pawl 71 is pivoted when it is run over by the bow fitting 11 or the catching or latching device 53 attached to it.

In the embodiment illustrated in FIGS. 14 and 15, the catching device 53 on the rear side of the mast 1 has bearing surfaces 58, 59 lying on both sides, which functionally correspond to the bearing points 16, 17 of the previously described embodiment.

The bearing surfaces can be pivoted about axes 60 in order to enable the above-described folding of the boom 3 or to ensure any desired relative position with respect to the mast 1.

In the embodiment shown, the two pivotable bearing surfaces 58, 59 on the bow side of the mast 1 are connected by a bracket 61 or the like, which engages in a corresponding notch 73 in the pawl 71.

The pawl device 52 is pivotally mounted on a housing 74 on an axis 75, the housing 74 having a half-shell-shaped bearing surface 62 with a friction-increasing inner lining 76 which partially encircles the mast 1. To hold the housing 74 at any desired height on the mast 1, a locking device, generally designated 63, is provided.

In the preferred embodiments according to FIGS. 13 to 20, the closing device 63 is designed as a plastic band 64 connected to the housing 74, which surrounds the mast and can be fixed in an eccentric buckle 65 in the manner of a ski boot buckle.

This construction ensures that the boom 3 is held securely on the mast 1 according to the selected height of the housing 74 after latching, while the essential forces are absorbed by the bearing surfaces 58, 59.

In both embodiments, an axle 68 is provided below the pawl device 52, to which the starting sheet 69 can be fastened.

The embodiment according to FIGS. 16 and 17 differs from the embodiment according to FIGS. 14 and 15 in that here the pawl device 52 and the associated catching device 53 are designed differently. The same reference numerals have been used for the same or equivalent parts, so that reference can be made to the above description.

In the embodiment according to FIGS. 16 and 17, the bearing surfaces 58, 59 are provided on an essentially U-shaped bearing block 66 which has a latching surface 67 for the latch device 52 on the bow side of the boom 3. When the boom 3 is moved downwards, the pawl 71 is again deflected until it engages with the locking surface 67 with a projection 77.

As further indicated in FIG. 20, it is preferred in the embodiments according to FIGS. 13 to 19 to provide interchangeable rear fittings 10 for the boom 3. Such rear fittings may have a scale 70, by means of which the clew 8 is preset in the usual manner into a corresponding trim position, in the depressurized state of the sail 2, the clew 8 is deflected by means of the trim sheet 57 via a deflection point 55 and is fixed in a slip clamp 56.

In the embodiments according to FIGS. 13 to 20, preference will therefore be given to either using end fittings 10 that match the length of the sails or to allow a trim within the limits, such as are given by the scale 70, for example covers different sail sizes.

Exemplary embodiments of the invention have been described above, and changes and modifications will be apparent to those skilled in the art without departing from the spirit of the invention, which is seen in trimming sail 2 in a completely unusual manner in the luff area. Such changes can relate in particular to the design of the connection between the mast and boom and the adjustability. An essential basic idea of the second basic embodiment according to the invention is to pre-program the correct trim of the sail through the position of the clew in the boom end fitting, after which the boom bow fitting is brought into engagement after being pushed down along the mast.

Claims (12)

1. A rig for a windsurfing board, comprising a mast, a sail which is held by the mast and tensioned by means of a wishbone boom and which receives the mast in a mast pocket forming the fore leech, the rig being unstayed with respect to the windsurfing board and secured by means of a joint freely rotatable and pivotable in all directions on the windsurfing board, the rig being held by the user at the wishbone boom and thereby adjusted relative to the wind and the windsurfing board, the sail being connected to the wishbone boom only at the boom head, the lower leech of the sail extending from the boom head in a manner inclined downwardly to the mast, and the wishbone boom being disposed above the sail tack, the wishbone boom comprising two outwardly curved booms and a bow fitting securable to the mast and a stern fitting for holding the clew of the sail, the booms being connected together by the bow and stern fittings, characterized in that the clew (8) is held substantially stationarily and the connection (15) between the mast (1) and the wishbone boom (3) is constructed in such manner that for tensioning and trimming the sail (2) the wishbone boom (3) can be pivoted from the direction of the top of the mast (1) into its end position making use of the entire lever arm formed by the wishbone boom (3), the clew (8) of the sail (2) serving as axis of rotation, and in that for fixing the wishbone boom (3) in the reached end position the connection (15) is constructed as coupling means (51) effective between the bow fitting (11) and the mast (1).

2. The rig as claimed in claim 1, characterized in that the coupling means (51) is constructed in two parts comprising a pawl means (52) secured vertically adjustably to the mast (1) and releasable by hand and a catch or detent means (53) in the bow fitting (11), and in that the pawl means (52) is spring-biased in closure position.

3. The rig as claimed in claims 1 or 2, characterized in that the position of the clew (8) with respect to the stern fitting (10) is adjustable and, for adjusting the relative position of the clew (8) as known per se, a deflection point (55) is provided for a trimming rope (57) on the stern fitting (10) and a belaying cleat (56) or the like is provided on the wishbone boom (3).

4. The rig as claimed in one of the preceding claims, characterized in that a catch means (53) is provided comprising bearing faces (58, 59) on the stern side of the mast (1) resting thereagainst on both sides, in that the bearing faces (58, 59) are mounted pivotally about an axis (60) with respect to the bow fitting (11), in that the catch means (53) comprises a stirrup member (61) or the like which, on the bow side of the mast (1), engages positively with a pawl means (52), in that the pawl means (52) with a hemispherical bearing face (62) engages partially round the mast (1) and is held with a releasable fastening means (63) on the mast (1), and in that the fastening means (63) is constructed as plastic band (64) engaging round the mast in conjunction with an eccentric clasp (65).

5. The rig as claimed in one of the preceding claims, characterized in that the bearing faces (58, 59) are provided on a substantially U-shaped bearing block (66) which comprises on the bow side a detent surface (67) for a pawl means (52).

6. The rig as claimed in claim 1, characterized in that the connection (15) between the mast (1) and the wishbone boom (3) is constructed in such manner that for trimming the sail (2) the mast (1) is displaceable reciprocatively in the longitudinal direction of the wishbone boom (3) and lockable.

7. The rig as claimed in claim 6, characterized in that the connection (15) is constructed as three-point mounting (16, 17, 18) which holds the mast (1) by frictional engagement, in that the three-point mounting (16, 17, 18) comprises frictional members (19, 20, 21) which are in contact with the mast (1) and the mast pocket (7) of the sail (2), respectively, in that at least two of the friction members are constructed as rollers (27, 28, 29) whose axes of rotation lie substantially parallely to the mast (1), in that the sail (2) is constructed with an uninterrupted mast pocket (7), and in that the frictional engagement is established with the outside of the mast pocket (7).

8. The rig as claimed in one of the preceding claims, characterized in that two bearing points (16, 17) are arranged symmetrically laterally behind the mast (1), the spacing of the bearing points (16, 17) with respect to each other being somewhat smaller than the diameter of the mast (1), in that the third bearing point (18) is disposed in the center axis of the wishbone boom (3) before the mast (1), and in that the third bearing point (18) is made resilient in the longitudinal direction.

9. The rig as claimed in one of the claims 6 to 8, characterized in that the bearing points (16, 17, 18) are adjustable in the longitudinal direction of the wishbone boom (3) by adjustment drive means (22) disposed in the bow fitting (11), in that the bearing points (16, 17, 18, 58, 59) are pivotally mounted, in that the mast (1) has a drop-shaped cross-section, and in that the engagement point (46) of the third bearing point (18) is resiliently suspended on both sides perpendicularly to the center line of the wishbone boom (3) in such manner that the mast (1) can execute a sprung rotational movement about its axis.

10. The rig as claimed in one of the preceding claims, characterized in that the stern fitting (10) comprises a securing means (32) for holding the clew (8), in that the securing means (32) is formed by one or more shafts (35) extending through the clew (8), in that the stern fitting (10) is divided and connectable by a fastener (39), and in that the fasterner (39) is formed by a shaft (35) which is firmly connected to one half (33) of the stern fitting (10) and a slide (39) which is disposed in the other half (34) and which is adapted to engage with a groove (38) at the free end of the shaft (35).

11. The rig as claimed in one of the claims 1 to 9, characterized in that the stern fitting (10) comprises a slot (41) for receiving the clew (8) and a shaft (35) which can be pushed therethrough.

12. The rig as claimed in one of the preceding claims, characterized in that in the region of the bow fitting (11) the wishbone boom (3) comprises a bend (30, 31) permitting the folding of the wishbone boom (3) in parallel with the mast (1).

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