Abstract:
A frame device ( 200 ) for a profiled sail device, the frame device ( 200 ) having at least one adjustable frame element ( 202 ), the at least one adjustable frame element ( 202 ) having longitudinal struts which are spaced apart from one another and are assigned to sail surfaces which are spaced apart from one another, and transverse struts which extend between the longitudinal struts, characterized in that the longitudinal struts and the transverse struts delimit quadrangles which each have two diagonals with varying lengths depending on the adjustment, and the diagonals each have a predetermined maximum length, and a profiled sail device having sail surfaces which are spaced apart from one another and against which the flow can impinge and which form profiled surfaces, a sail front edge and an adjustable skeleton device arranged between the sail surfaces. The skeleton device has at least one frame device ( 200 ) of this type.

Description:
[0001]    The present invention relates to a frame device for a profiled sail device, the frame device including at least one adjustable frame element, the at least one adjustable frame element including longitudinal beams spaced apart from one another, which are assigned to sail areas spaced apart from one another and transverse beams, which extend between the longitudinal beams. The present invention furthermore relates to a profiled sail device including incident-flow sail areas spaced apart from one another which form profile surfaces, a sail leading edge, and an adjustable skeleton device situated between the sail areas. 
       BACKGROUND 
       [0002]    A frame device for a profiled sail device is known from WO 2012/168048 A1, the frame device including multiple frame elements which are adjustable in relation to each other, at least one frame element having a first profile contour which is assigned to one sail area and a second profile contour which is assigned to another sail area, the frame device having a profile contour which includes at least one profile contour section formed with the aid of a profile contour of the at least one frame element, and the frame device being adjustable between a first operating position and a second operating position, in which in the first operating position the first profile contour of the at least one frame element forms at least one profile contour section of the frame device for the first sail area or for the second sail area, and the second profile contour of the at least one frame element does not form a profile contour section of the frame device for the sail area, and in the second operating position the first profile contour of the at least one frame element does not form a profile contour section of the frame device for the sail area and the second profile contour of the at least one frame element forms at least one profile contour section of the frame device for the respective other sail area. 
         [0003]    From EP 511 050 A1 a device is known, made up of at least one aerodynamically shaped element, of which at least a portion or a zone is foldable, for propulsion and/or for lift under the action of the wind directed thereon, including two surfaces, one each for the pressure (windward) side and for the suction (leeward) side, in which at least one slot is provided to conduct the air flow tangentially to the aforementioned element, the aforementioned slot and the aforementioned control elements of the aforementioned air flow impacting the position and the geometry of at least a portion and/or a zone of the aforementioned element with respect to the geometry and the opening/closure with the aid of devices, and the aforementioned device moreover including means which regulate the geometry of the aforementioned element, at least the shape and depth of the curvature. 
         [0004]    From U.S. Pat. No. 4,624,203 A a batten structure for a flow profile is known for use in combination with similar batten structures, the batten structures being held in a spaced relation inside a wing sail, the batten structure including: a beam including a front section having holders for the slidable engagement with a carrier, such as a mast, and a rear section fixedly connected to the front section, a nose part which is pivotably connected to the front end of the beam with the aid of pivot means, in front of the holders, the nose part including side areas which are configured to provide a front end section of a hydrofoil, two flexible elongated batten parts, which each extend rearwardly from opposite sides of the nose part outside the beam, the batten parts being rigidly connected at front ends to the nose part and providing extensions of the side areas and being slidably connected to each other at rear ends rearwardly of the rear end of the beam, and an elongated spreader means having mutually opposing ends, connected to the batten parts, to connect the parts to each other and provide a mobility relative to the beam, the arrangement of the spreader means, beam, nose part and batten parts being such that a sail pressure acting on a windwardly directed batten part is able to flex a central part of this batten part against the beam between the nose part and the rear end of the beam in order to pivot the nose part against the windwardly directed side, while the other batten part is held away from the beam and is held in a convex shape by the spreader means and by the pivoting of the nose part, these shapes of the batten parts, together with the nose part, forming a section of the wing sail which is divided into chambers. 
       SUMMARY OF THE INVENTION 
       [0005]    It is an object of the present invention to structurally and/or functionally improve a frame device mentioned at the outset. Furthermore, a profiled sail device mentioned at the outset is to be improved structurally and/or functionally. In particular, a propulsion is to be enabled with greater efficiency. In particular, a two-way functionality is to be enabled. In particular, a curvature is to be settable independently of the wind pressure. In particular, an operability is to be simplified. In particular, a maximum curvature is to be limitable or limited. In particular, a maximum curvature is to be adaptably limitable or limited multiple times across a cross section of a profiled sail device. In particular, a load-carrying capacity of a limitation is to be increased. In particular, a limitation-induced load should be absorbable in a distributed manner. In particular, a limitation is to be absorbable across a cross section of a profiled sail device in a distributed manner. In particular, a weight is to be reduced. In particular, a load-carrying capacity is to be increased. In particular, an operability is to be simplified. 
         [0006]    The present invention provides a frame device for a profiled sail device, the frame device including at least one adjustable frame element, the at least one adjustable frame element including longitudinal beams spaced apart from one another, which are assigned to sail areas spaced apart from one another, and transverse beams, which extend between the longitudinal beams, in which the longitudinal beams and the transverse beams delimit quadrangles, which each have two diagonals having lengths that vary as a function of the adjustment, and the diagonals each having a predetermined maximum length. 
         [0007]    The at least one adjustable frame element may be elastically adjustable. Proceeding from a neutral center position, the at least one adjustable frame element may be adjustable between a first end position and a second end position. Proceeding from the neutral center position, the at least one adjustable frame element may be adjustable in the direction of the first end position under the application of a force, and may be adjustable in the direction of the neutral center position when the application of a force is removed or reduced. Proceeding from the neutral center position, the at least one adjustable frame element may be adjustable in the direction of the second end position under the application of a force, and may be adjustable in the direction of the neutral center position when the application of a force is removed or reduced. 
         [0008]    The at least one adjustable frame element may have a longitudinal axis. In the neutral center position, the at least one adjustable frame element may have a shape which is symmetrical to the longitudinal axis. When the at least one adjustable frame element is adjusted in the direction of the first end position, the longitudinal axis may be bent in a first direction. When the at least one adjustable frame element is adjusted in the direction of the second end position, the longitudinal axis may be bent in a second direction opposite the first direction. 
         [0009]    The longitudinal beams may each have a front end and a rear end. The longitudinal beams may be connected to each other at their front ends. The at least one adjustable frame element may include a bowed section. The longitudinal beams may be connected to each other at their front ends with the aid of the bowed section. The longitudinal beams and the bowed section may be designed in one part. The longitudinal beams and the bowed section may delimit a cross section of the profiled sail device. Proceeding from their front ends, the longitudinal beams may be situated to converge in the direction of their rear ends. The bowed section may be assigned to a front edge of the profiled sail device. The rear ends of the longitudinal beams may be assigned to a rear edge of the profiled sail device. 
         [0010]    The rear ends of the longitudinal beams may be free. The rear ends of the longitudinal beams may in particular be displaceable in relation to each other in the extension direction of the longitudinal axis. The longitudinal beams may be elastically bendable. The transverse beams may be used as compression members. The transverse beams may be essentially rigid. 
         [0011]    The quadrangles delimited by the longitudinal beams and the transverse beams may each have four corners. The quadrangles may be convex. The quadrangles may be deformable during an adjustment of the at least one adjustable frame element. The quadrangles may be deformable in a parallelogram-like manner during an adjustment of the at least one adjustable frame element. The lengths of the diagonals may change during a deformation of the quadrangles. The quadrangles may each have a first diagonal and a second diagonal. When the at least one adjustable frame element is adjusted to its first end position, the first diagonals may have a maximum length and the second diagonals may have a minimum length. When the at least one adjustable frame element is adjusted to its second end position, the second diagonals may have a maximum length and the first diagonals may have a minimum length. The first diagonals may have a predetermined maximum length. The second diagonals may have a predetermined maximum length. Due to the predetermined maximum length of the diagonals, an adjustability of the at least one adjustable frame element may be limited. 
         [0012]    The frame device may include tension elements for predetermining the maximum lengths of the diagonals. The frame device may include first tension elements for limiting the maximum length of the first diagonal to a predetermined value. The frame device may include second tension elements for limiting the maximum length of the second diagonal to a predetermined value. The tension element may each have two ends. The tension elements may each be connected at their ends to the corners of the quadrangles with tensile strength. Tensile stresses may be absorbable with the aid of the tension elements. A further adjustment may be prevented in that the first tension elements or the second tension elements are tensioned. 
         [0013]    The tension elements may be limp at least in sections. The tension elements may each have a fixed length. The tension elements may each have a settable length. The fixed or settable length of the tension elements may be used to predetermine the maximum length of the diagonals. The tension elements may be formed with the aid of ropes having a fixed or settable length. The tension elements may each include a rope section having a fixed length and a length-adjustable tension section. The tension sections may each be mechanically, electromechanically, pneumatically and/or hydraulically length-adjustable. 
         [0014]    The frame device may include at least one fixed frame element. The at least one fixed frame element may be situated displaceably on the at least one adjustable frame element. The at least one fixed frame element may be situated pivotably on the at least one adjustable frame element. The at least one fixed frame element may be situated slidably on the at least one adjustable frame element. A displacement of the at least one fixed frame element may cause an adjustment of the at least one adjustable frame element. The at least one fixed frame element may be displaceable with the aid of actuatable tension elements. 
         [0015]    The frame device may include at least two fixed frame elements. The at least two fixed frame elements may be situated displaceably on the at least one adjustable frame element. The at least two fixed frame elements may be counter-displaceable with the aid of actuatable tension elements. 
         [0016]    The frame device may include a first fixed frame element. The first fixed frame element may be situated at the front ends of the longitudinal beams. The first fixed frame element may be pivotably connected to the longitudinal beams. The first fixed frame element may include two coupling points for the connection to the longitudinal beams. Pivot bearings may be used for the pivotable connection. Proceeding from the front ends of the longitudinal beams of the at least one adjustable frame element, the first fixed frame element may extend essentially in the direction of the rear ends of the longitudinal beams. The first fixed frame element, in turn, may include longitudinal beams spaced apart from one another, which are assigned to sail areas spaced apart from one another, and transverse beams, which extend between the longitudinal beams. The longitudinal beams and the transverse beams of the first fixed frame element may delimit quadrangles or a triangle, which each have two diagonals having fixed lengths. Fixed tension elements and/or pressure elements may be situated in the quadrangles. 
         [0017]    The frame device may include a second fixed frame element. The second fixed frame element may be situated at the rear ends of the longitudinal beams. The second fixed frame element may be slidably connected to the longitudinal beams. The longitudinal beams of the second fixed frame element and the longitudinal beams of the at least one adjustable frame element may be connected to each other with the aid of sliding sleeves. Proceeding from rear ends of the longitudinal beams of the at least one adjustable frame element, the second fixed frame element may extend essentially in the direction of the front ends of the longitudinal beams. The second fixed frame element, in turn, may include longitudinal beams spaced apart from one another, which are assigned to sail areas spaced apart from one another, and transverse beams, which extend between the longitudinal beams. The longitudinal beams and the transverse beams of the first fixed frame element may delimit a quadrangle or a triangle. 
         [0018]    The at least two fixed frame elements may be collectively displaceable in a first displacement direction with the aid of a first tension element, and may be collectively displaceable in a second displacement direction opposite the first displacement direction with the aid of a second tension element. The first tension element and the second tension element may be guided on the at least one adjustable frame element and on the first fixed frame element and connected to the second fixed frame element with tensile strength. Ropes may be used as tension elements. 
         [0019]    In the first end position of the at least one adjustable frame element, the at least one fixed frame element may form a profile contour of the frame device for a first sail area of the profiled sail device, while the at least one adjustable frame element may form a profile contour of the frame device for a second sail area of the profiled sail device situated opposite the first sail area. In the second end position of the at least one adjustable frame element, the at least one fixed frame element may form a profile contour of the frame device for the second sail area of the profiled sail device, while the at least one adjustable frame element may form a profile contour of the frame device for the first sail area of the profiled sail device. When the end positions of the at least one adjustable frame element are changed, contact surfaces of the frame elements for the sail areas may change. 
         [0020]    The frame elements may be produced in several parts and assembled. The frame elements may be assembled from individual rods, tubes, segments and/or connecting parts. The tubes or rods may have a round cross section. The tubes or rods may have a quadrangular cross section. The frame elements may be produced using a sandwich method. The frame elements may include rollers for deflecting actuating ropes. The frame elements may include passages for actuating ropes. The frame elements may be produced at least partially in one part. The frame elements may be foam-sandwich components. The frame element may include a material such as wood, light metal alloy, plastic material and/or fiber composite. The light metal alloy may be an aluminum alloy or a titanium alloy. The plastic material may be filled. Talc, chalk, kaolin, carbon black, glass spheres and/or glass fibers may be used as fillers. The fiber composite may have a matrix. Duromers, also referred to as synthetic resins, elastomers and/or thermoplastics may be used as the matrix. The fiber composite may include fibers. The fibers used may be glass fibers, carbon fibers, ceramic fibers, aramid fibers, boron fibers, basalt fibers, steel fibers, natural fibers and/or nylon fibers. 
         [0021]    The frame device may include an opening for accommodating a mast. The frame device may thus be fixed on the mast. The frame device may be fixed on the mast so as to have limited mobility, in particular mobility in a direction orthogonal to a mast axis. The frame device may be pivotable about the mast. The profiled sail device may thus transition from one side to another side, for example during a tack or a jibe. The frame device may be slidable on the mast in the direction of the mast axis. In this way, the profiled sail device may be hoisted, lowered or reefed. 
         [0022]    At least one of the fixed frame elements may have an at least two-part design. The at least two parts of this frame element may be displaceable with respect to each other. As a result of a displacement of the at least one fixed frame element, it is also possible to displace the at least two parts of this frame element with respect to each other. The at least one two-part frame element may be situated on the profile trailing edge side. 
         [0023]    The object underlying the present invention is additionally achieved by a profiled sail device including incident-flow sail areas spaced apart from one another which form profile surfaces, a sail leading edge, and an adjustable skeleton device situated between the sail areas, in which the skeleton device includes at least one such frame device. 
         [0024]    The longitudinal beams may each include a keder-like round rod. The longitudinal beams may each include a keder rail-like profiled rod. The profiled rods may each have a slot-shaped opening. The profiled rods may each have a C-shaped or an a-shaped profile. The round rods may be situated on the interior. The profiled rods may be situated on the exterior. The round rods may have a larger diameter than the slot-shaped openings of the profiled rods. The sail areas may include keder flap-like sections. The keder flap-like sections may each include a flap section and an accommodating section. The keder flap-like sections may be formed by topstitching. The accommodating sections may be used to accommodate the round rods. The flap sections may be used for guidance through the slot-shaped openings of the profiled rods. The first sail area may include keder flap-like sections. The second sail area may include keder flap-like sections. The sail areas may include keder flap-like sections for each frame device. The sail areas may be attached with their keder flap-like sections to the longitudinal beams. 
         [0025]    The profiled sail device may be connected to a mast. The profiled sail device may be used with a sailing vehicle. The sailing vehicle may be a water craft or a land craft. The sailing vehicle may be a sail boat, an ice boat or a land sailer. The sail boat may be a single-hull boat or a multi-hull boat. The multi-hull boat may in particular include two or three hulls. The multi-hull boat may be a catamaran or a trimaran. The sail boat may be a hydroplane or a hydrofoil vessel. The sail boat may include a hydrofoil. 
         [0026]    The sail boat may include one mast or multiple masts. The sail boat may be a sloop. The sail boat may be a schooner, a ketch or a yawl. The sail boat may be a sports boat. The sail boat may be a racing boat. The sail boat may be a regatta boat. The sail boat may be a cruiser. The profiled sail device may be used as a fore-and-aft sail. The profiled sail device may be used as a main sail. The profiled sail device may be used as a foresail, a gaff foresail or a spanker sail. The profiled sail device may be an oversized sail. 
         [0027]    The at least one frame device may have a main plane which is essentially orthogonal to an axis of the mast. The skeleton device may include multiple frame devices. The frame devices may be situated essentially in parallel to each other with their main planes. The frame devices may be situated on top of each other in the extension direction of a mast. 
         [0028]    The frame devices may be adjustable independently of each other. Multiple frame devices may be adjustable together. Multiple frame devices may be adjustable in groups. Multiple frame devices may be adjustably matched to each other. Multiple frame devices may be adjustably matched to each other in groups. 
         [0029]    In this way, a profile is settable independently of an incident flow. A set profile may maintain its profiling even when the incident flow changes. A profile curvature is settable. A profile is invertible. A profile which is optimized for an incident flow of the first sail area is settable. A profile which is optimized for an incident flow of the second sail area is settable. A propulsion force acting on a mast may be set. A contact point of a forward propulsion force acting on a mast may be set. A momentum acting on a boat hull may be set. The profiled sail device, in particular the at least one frame device, may correspond to the principles of a lightweight construction. The profiled sail device, in particular the at least one frame device, has a high stiffness and strength. The profiled sail device is easy to handle. 
         [0030]    The at least one frame device may be adjustable in operating positions which are between the first end position and the second end position. In this way, it is possible to set appropriate profile surfaces both for the first sail area and for the second sail area. The profile surface for the first sail area and the profile surface for the second sail area may each be different. 
         [0031]    A first hydrofoil profile and a second hydrofoil profile may be formed with the profiled sail device. The first hydrofoil profile may be an asymmetrical hydrofoil profile, and the second hydrofoil profile may be a hydrofoil profile which is complementary to the first hydrofoil profile. The hydrofoil profile may be a normal profile whose incident-flow side (windward) is convexly curved and whose opposite side (leeward) is curved in an S shape. The hydrofoil profile may be used in a wide speed range. A dynamic propulsion may be generated with the hydrofoil profile. 
         [0032]    “May” denotes in particular optional features of the present invention. Accordingly, there is one exemplary embodiment of the present invention in each case which includes the particular feature or the particular features. 
         [0033]    The present invention enables a propulsion with increased efficiency. A two-way functionality is made possible. A curvature is settable independently of the wind pressure. An operability is simplified. A maximum curvature is limitable or limited. A maximum curvature is adaptably limitable or limited multiple times across a cross section of a profiled sail device. A load-carrying capacity of a limitation is increased. A limitation-induced load is absorbable in a distributed manner A limitation is absorbable across a cross section of a profiled sail device in a distributed manner. A weight is reduced. A load-carrying capacity is increased. An operability is simplified. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0034]    Exemplary embodiments of the present invention are described in greater detail hereafter with reference to figures. Additional features and advantages are derived from this description. Specific features of these exemplary embodiments may represent general features of the present invention. Features of these exemplary embodiments combined with other features may also represent individual features of the present invention. 
           [0000]    Schematically and by way of example: 
           [0035]      FIG. 1  shows a profiled sail device including exterior sail areas and an interior skeleton structure; 
           [0036]      FIG. 2  shows a frame device for a profiled sail device including an adjustable frame element, two fixed frame elements situated displaceably on the adjustable frame element, and actuating ropes; 
           [0037]      FIG. 3  shows a frame device for a profiled sail device including an adjustable frame element and two fixed frame elements in a non-assembled state; 
           [0038]      FIG. 4  shows an adjustable frame element of a frame device including fixed tension elements to limit maximum lengths of diagonals; 
           [0039]      FIG. 5  shows an adjustable frame element of a frame device including adjustable tension elements to limit maximum lengths of diagonals; 
           [0040]      FIG. 6  shows a detailed view of a corner of a quadrangle, which is delimited by longitudinal beams and transverse beams, including a tension element; 
           [0041]      FIG. 7  shows a detailed view of a frame device for a profiled sail device including an adjustable frame element, two fixed frame elements situated displaceably on the adjustable frame element, and actuating ropes; 
           [0042]      FIG. 8  shows a longitudinal beam of an adjustable frame element having a C-profile and a sail area attached thereto in a sectional view; 
           [0043]      FIG. 9  shows a longitudinal beam of an adjustable frame element having a Ω-profile and a sail area attached thereto in a sectional view; and 
           [0044]      FIG. 10  shows a frame device for a profiled sail device including an adjustable frame element and two fixed frame elements situated displaceably on the adjustable frame element, one of the fixed frame elements having a two-part design. 
       
    
    
     DETAILED DESCRIPTION 
       [0045]      FIG. 1  shows a profiled sail device  100  including exterior sail areas  102 ,  104  and an interior skeleton structure  106 . Profiled sail device  100  is used to propel a sailing vehicle, which is not shown in greater detail here. Skeleton structure  106  predefines the shape of profiled sail device  100 . Sail areas  102 ,  104  are stretched over skeleton structure  106 . Profiled sail device  100  has a first sail area  102  and an opposite second sail area  104 . A cavity  108  in which skeleton structure  106  is situated is formed between sail areas  102 ,  104 . 
         [0046]    Profiled sail device  100  has a hydrofoil profile, with the aid of which a dynamic propulsion may be generated with the aid of a hydrofoil effect. The hydrofoil profile of profiled sail device  100  is adjustable between two end positions. It is possible to set operating positions for an incident flow of first sail area  102  and operating position for an incident flow of second sail area  104 . The sail area to be provided with incident flow has a convexly curved surface. The opposite sail area has a surface bent in an S-shape. Profiled sail device  100  includes a leading edge  110  having an edge radius and a trailing edge  112  having a trailing edge angle. The longest line from leading edge  110  to trailing edge  112 , which is identical to the chord, determines the profile depth. The profile curvature results as the largest possible deviation of a mean line from the chord. Mean line refers to the line which in the cross section of profiled sail device  100  is situated exactly between sail areas  102 ,  104 . The profile contour of profiled sail device  100  is thus symmetrical about the mean line. Another definition reads: The mean line is the line that connects the circle center points inscribed into a profile. The profile thickness is the largest possible diameter of the circle on the mean line within the profile. The profile curvature decisively determines the maximum propulsion and is essential for a moment coefficient. 
         [0047]    Sail areas  102 ,  104  may be made of a woven fabric of synthetic fibers. Sail areas  102 ,  104  may be formed with a laminate sail in which fibers are glued to foils or a fabric. Sail areas  102 ,  104  may be formed with a membrane sail in which reinforcing fibers are already introduced during the manufacture of the sail in accordance with an expected load line. Sail areas  102 ,  104  may include synthetic fibers, for example made of polyamide, polyester, polyethylene naphthalate, aramid and/or carbon fibers. 
         [0048]    Skeleton structure  106  includes multiple, in the present example  19 , frame devices, such as  114 . Frame devices  114  each include three frame elements which are displaceable with respect to each other. In this way, profiled sail device  100  may be adjusted. 
         [0049]    Profiled sail device  100  is situated on a mast  116 . Mast  116  extends into cavity  108  and through the opening in frame devices  114  when profiled sail device  100  has been hoisted. A clearance is present between edges of the openings and the mast. Frame devices  114  are displaceable on mast  116  to a limited extent. Frame devices  114  are slidable on mast  116  in the direction of the mast axis. Frame devices  114  are pivotable about mast  116 . In this way, profiled sail device  100  is pivotable about mast  116 . Mast  116  extends in the hydrofoil profile behind leading edge  110  so that a smaller section of profiled sail device  100  extends between mast  116  and leading edge  110 , and a larger section of profiled sail device  100  extends between mast  116  and profile trailing edge  112 . In the present example, mast  116  is fixedly, in particular non-rotatably, connected to a vehicle body, such as a boat hull. Mast  116  may be situated on a keel and be guided through a deck. Alternatively, mast  116  may be situated on the deck and be supported from beneath on the keel. 
         [0050]      FIG. 2  shows a frame device  200  for a profiled sail device including an adjustable frame element  202 , two fixed frame elements  204 ,  206  situated displaceably on adjustable frame element  202 , and actuating ropes  208 ,  210 .  FIG. 3  shows frame device  200  in the unassembled state. 
         [0051]    Proceeding from a neutral center position, frame device  200  and adjustable frame element  202  are optionally adjustable into a first end position or into a second end position.  FIG. 2  shows frame device  200  in the first end position. Adjustable frame element  202  forms a central frame element. Frame device  200  and adjustable frame element  202  have a longitudinal axis  212 . In the neutral center position, longitudinal axis  212  is straight. During an adjustment in the direction of the end positions, longitudinal axis  212  is bent. 
         [0052]    Adjustable frame element  202  includes two pivot bearings  214 ,  216  on the leading edge side, to which fixed frame element  204  together with adjustable frame element  202  is displaceably connected. Proceeding from pivot bearings  214 ,  216 , fixed frame element  204  essentially extends in the direction of trailing edge  218 . Fixed frame element  204  is displaceable between a first end position and a second end position. 
         [0053]    Fixed frame element  204  includes longitudinal beams such as  220 , transverse beams such as  222 , and diagonal members such as  224 . Fixed frame element  204  has an elongated triangular-like shape having a shorter base and legs curved in a tapered manner. At the corners assigned to the base, fixed frame element  204  is pivotably connected to pivot bearings  214 ,  216 . Fixed frame element  204  has a comparatively rigid design in itself. 
         [0054]    Adjustable frame element  202  includes two sliding sleeves  226 ,  228  on the trailing edge side, to which fixed frame element  206  together with adjustable frame element  202  is displaceably connected. Proceeding from sliding sleeves  226 ,  228 , fixed frame element  206  essentially extends in the direction of leading edge  230 . Fixed frame element  206  is displaceable between a first end position and a second end position. 
         [0055]    Fixed frame element  206  includes longitudinal beams, such as  232 , and transverse beams, such as  234 . Fixed frame element  206  has a needle-like shape having longitudinal beams  232  curved in a tapered manner on either side. At one end, fixed frame element  206  is slidably connected to adjustable frame element  202  with the aid of sliding sleeves  226 ,  228 . Fixed frame element  206  has a comparatively rigid design in itself. 
         [0056]    Actuating ropes  208 ,  210  are guided on adjustable frame element  202  and on fixed frame element  204  and connected to fixed frame element  206  with tensile strength in such a way that a tensile force of actuating rope  208  causes an adjustment in the direction of the first end position, and a tensile force of actuating rope  210  causes an adjustment in the direction of the second end position. This results in a counter-displacement of fixed frame elements  204 ,  206 , so that fixed frame elements  204 ,  206  in the first end position form a profile contour for a first sail area, while a profile contour for a second sail area is formed by adjustable frame element  202 , and in the second end position from a profile contour for the second sail area, while a profile contour for the first sail area is formed by adjustable frame element  202 . Incidentally, reference is additionally made in particular to  FIG. 1  and the related description. 
         [0057]      FIG. 4  shows an adjustable frame element  300  of a frame device including fixed tension elements, such as  302 ,  304 , to limit maximum lengths of the diagonals. 
         [0058]    Frame element  300  has a longitudinal axis  306 . In the neutral center position, longitudinal axis  306  is straight. During an adjustment in the direction of the end positions, frame element  300  is bent elastically along longitudinal axis  306 .  FIG. 4  shows frame element  300  in the bent position. 
         [0059]    Frame element  300  has a drop-shaped outer contour. Frame element  300  includes longitudinal beams  308 ,  310 . Longitudinal beams  308 ,  310  each have a front end and a rear end. Longitudinal beams  308 ,  310  are connected to each other at their front ends with the aid of a bowed section  312 . Proceeding from their front ends, longitudinal beams  308 ,  310  are situated to converge in the direction of their rear ends. Longitudinal beams  308 ,  310  and bowed section  312  are used to delimit a cross section of a profiled sail device, such as profiled sail device  100  according to  FIG. 1 . Bowed section  312  forms a leading edge of the profiled sail device, and the rear ends of longitudinal beams  308 ,  310  are assigned to a trailing edge. 
         [0060]    The rear ends of longitudinal beams  308 ,  310  are free and displaceable with respect to each other during an adjustment of frame element  300  in the extension direction of longitudinal axis  306 . Longitudinal beams  308 ,  310  are elastically bendable. Frame element  300  includes transverse beams, such as  314 . Transverse beams  314  extend between longitudinal beams  308 ,  310  and hold longitudinal beams  308 ,  310  in a spaced apart position. Transverse beams  314  are used as compression members and are essentially rigid. Longitudinal beams  308 ,  310  and transverse beams  314  delimit convex quadrangles, such as  316 , each having four corners and two intersecting diagonals. Tension elements  302 ,  304  each have two ends. Tension elements  302  are attached at their ends in opposing corners of quadrangles  316 . Tension elements  304  are attached at their ends in opposing corners of quadrangles  316 . Tension elements  302 ,  304  are situated so as to intersect. 
         [0061]    During an adjustment of frame element  300 , quadrangles  316  deform in a parallelogram-like manner. As a result, the lengths of the diagonals change. When frame element  300  has been adjusted into an end position, one diagonal of quadrangles  316  has a maximum length and the other diagonal has a minimum length. The maximum lengths of the diagonals are limited by the lengths of tension elements  302 ,  304 . When frame element  300  has been adjusted into an end position, tension elements  302  or tension elements  304  are tensioned, independently of the end position, so that a further adjustment of frame element  300  is prevented. In the present example, limp ropes serve as tension elements  302 ,  304 . Tension elements  302 ,  304  assigned to the shorter diagonals may thus sag without tensile stress. Incidentally, reference is additionally made in particular to  FIG. 2  and  FIG. 3  and the related description. 
         [0062]      FIG. 5  shows an adjustable frame element  400  of a frame device including adjustable tension elements  402 ,  404  to limit maximum lengths of diagonals. 
         [0063]    Tension elements  402 ,  404  each include a rope section  406 ,  408  having a fixed length and a length-adjustable tension section  410 ,  412 . Tension sections  410 ,  412  may each be mechanically, electromechanically, pneumatically and/or hydraulically length-adjustable. The maximum lengths of the diagonals are thus settable. The end positions of frame device  200  are thus settable. A shape of frame device  200  in the end positions is thus settable. Incidentally, reference is additionally made in particular to  FIG. 4  and the related description. 
         [0064]      FIG. 6  shows a detailed view of a corner  500  of a quadrangle  506  delimited by longitudinal beams, such as  502 , and transverse beams, such as  504 , including a tension element  508 . Adjustable frame element  510  includes connecting elements, such as  512 . Connecting elements  512  are used to connect longitudinal beams  502  and transverse beams  504  and to attach tension elements  508 . Connecting elements  512  each include fixed sections for accommodating longitudinal beams  502  and transverse beams  504 . Connecting elements  512  each include a flexible section situated between the fixed sections. Connecting elements  512  each include eye-shaped attachment points, such as  514 , for attaching tension elements  508 . Connecting element  512  is situated at a nodal point between longitudinal beam  502  and transverse beam  504  and is used to attach two tension elements, such as  508 , of two adjoining quadrangles, such as  506 . Incidentally, reference is additionally made in particular to  FIGS. 2 through 5  and the related description. 
         [0065]      FIG. 7  shows a detailed view of a frame device  600  for a profiled sail device including an adjustable frame element  602 , two fixed frame elements  604 ,  606  situated displaceably on adjustable frame element  602 , and actuating ropes  608 ,  610 . 
         [0066]    In the end position shown, actuating rope  608  is pulled actively in the direction of arrow a, and actuating rope  610  is inactive. Actuating rope  608  is guided with the aid of two rollers  612 ,  614  on longitudinal beam  616  of frame element  602 . Frame element  604  includes a guide  618  on which actuating rope  608  is guided. Actuating rope  608  is connected at one end to frame element  606  with tensile strength. A pull of actuating rope  608  in the direction of arrow a causes frame elements  604 ,  606  to be counter-displaced in such a way that frame elements  604 ,  606  are displaced toward longitudinal beam  616  of frame element  602 . Actuating rope  610  is also guided on the longitudinal beam of frame element  602 , which is not apparent here. A pull of actuating rope  610  in the direction of arrow b, with an inactive actuating rope  608 , causes frame elements  604 ,  606  to be counter-displaced in the opposite direction in such a way that frame elements  604 ,  606  are displaced toward the longitudinal beam of frame element  602 , which is not apparent here. Incidentally, reference is additionally made in particular to  FIGS. 2 through 5  and the related description. 
         [0067]      FIG. 8  shows a longitudinal beam  700  of an adjustable frame element having a C-profile and sail area  702  attached thereto in a sectional view. The longitudinal beams such as  700 , each have a keder-like round rod  704  and a keder rail-like profiled rod  706  having a slot-shaped opening  708 . Round rod  704  is situated in the interior, and profiled rod  706  is situated in the exterior. Round rod  704  has a larger diameter than slot-shaped opening  708 . Sail area  702  includes keder flaps formed by topstitching including a flap section  710  for guidance through opening  708  and an accommodating section  712  for round rod  704 . Sail area  702  is attached to longitudinal beam  700  with the aid of the keder flap. Profiled rod  706  has a C-shaped profile in the present example. Incidentally, reference is additionally made in particular to  FIGS. 1 through 3  and the related description. 
         [0068]      FIG. 9  shows a longitudinal beam  800  of an adjustable frame element having an Ω-profile and a sail area attached thereto in a sectional view. Profiled rod  802  has an Ω-shaped profile in the present example. Incidentally, reference is additionally made in particular to  FIG. 8  and the related description. 
         [0069]      FIG. 10  shows a frame device  900  for a profiled sail device including an adjustable frame element  902  and two fixed frame elements  904 ,  906  situated displaceably on adjustable frame element  902 , fixed frame elements  906  having a two-part design. Fixed frame element  906  is assigned to trailing edge  908 . Fixed frame element  906  includes a first part  910  and a second part  912 . First part  910  is situated on the leading edge side. Second part [[ 910 ]]  912  is situated on the trailing edge side. First part  910  and second part  912  are mounted on each other with the aid of a pivot bearing  914 . Second part [[ 910 ]]  912 , together with one end, forms trailing edge  908 . 
         [0070]    Two actuating ropes  916 ,  918  are provided for actuation. Actuating ropes  916 ,  918  are guided on adjustable frame element  902 , fixed frame element  904 , first part  910  of fixed frame element  906  and second part  912  of fixed frame element  906 , or are connected thereto, in such a way, that a tensile force of actuating rope  916  causes an adjustment in the direction of an end position, and a tensile force of actuating rope  918  causes an adjustment in the direction of another end position. This results in a counter-displacement of fixed frame elements  904 ,  906  and a co-displacement of first part  910  and second part  912 . An adjustment in the direction of the one end position takes place differently from an adjustment in the direction of the other end position. In one adjustment direction, fixed frame elements  904 ,  906  with their ends facing each other are pulled with the aid of an actuating rope toward longitudinal beam  920 , proceeding from a deflection on a longitudinal beam  920 . In the other adjustment direction, an actuating rope guides an angle between fixed frame elements  904 ,  906  over a lever system. Longitudinal beam  920  follows the adjustment guided by sliding guides. 
         [0071]    With the aid of second part  912  of fixed frame element  906 , an improved defined setting of trailing edge  908  is made possible. Incidentally, reference is additionally made in particular to  FIG. 2  and  FIG. 3  and the related description. 
       LIST OF REFERENCE NUMERALS 
       [0000]    
       
           100  profiled sail device 
           102  sail area 
           104  sail area 
           106  skeleton structure 
           108  cavity 
           110  leading edge 
           112  trailing edge 
           114  frame device 
           116  mast 
           200  frame device 
           202  adjustable frame element 
           204  fixed frame element 
           206  fixed frame element 
           208  actuating rope 
           210  actuating rope 
           212  longitudinal axis 
           214  pivot bearing 
           216  pivot bearing 
           218  trailing edge 
           220  longitudinal beam 
           222  transverse beam 
           224  diagonal member 
           226  sliding sleeve 
           228  sliding sleeve 
           230  leading edge 
           232  longitudinal beam 
           234  transverse beam 
           300  adjustable frame element 
           302  fixed tension element 
           304  fixed tension element 
           306  longitudinal axis 
           308  longitudinal beam 
           310  longitudinal beam 
           312  bowed section 
           314  transverse beam 
           316  quadrangle 
           400  adjustable frame element 
           402  adjustable tension element 
           404  adjustable tension element 
           406  rope section 
           408  rope section 
           410  length-adjustable tension section 
           412  length-adjustable tension section 
           500  corner 
           502  longitudinal beam 
           504  transverse beam 
           506  quadrangle 
           508  tension element 
           510  adjustable frame element 
           512  connecting element 
           514  attachment point 
           600  frame device 
           602  adjustable frame element 
           604  fixed frame element 
           606  fixed frame element 
           608  actuating rope 
           610  actuating rope 
           612  roller 
           614  roller 
           616  longitudinal beam 
           618  guide 
           700  longitudinal beam 
           702  sail area 
           704  round rod 
           706  profiled rod 
           708  opening 
           710  flap section 
           712  accommodating section 
           800  longitudinal beam 
           802  profiled rod 
           900  frame device 
           902  adjustable frame element 
           904  fixed frame element 
           906  fixed frame element 
           908  trailing edge 
           910  first part 
           912  second part 
           914  pivot bearing 
           916  actuating rope 
           918  actuating rope 
           920  longitudinal beam