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EP4323272A1 - Gréement et aile - Google Patents

Gréement et aile

Info

Publication number
EP4323272A1
EP4323272A1 EP22722453.2A EP22722453A EP4323272A1 EP 4323272 A1 EP4323272 A1 EP 4323272A1 EP 22722453 A EP22722453 A EP 22722453A EP 4323272 A1 EP4323272 A1 EP 4323272A1
Authority
EP
European Patent Office
Prior art keywords
spoiler profile
profile
spoiler
kite
front tube
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP22722453.2A
Other languages
German (de)
English (en)
Inventor
Max Pajank
Antonio Destino
Till Eberle
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Boards and More GmbH
Original Assignee
Boards and More GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE102021125438.8A external-priority patent/DE102021125438A1/de
Priority claimed from DE202021105301.1U external-priority patent/DE202021105301U1/de
Application filed by Boards and More GmbH filed Critical Boards and More GmbH
Publication of EP4323272A1 publication Critical patent/EP4323272A1/fr
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H8/00—Sail or rigging arrangements specially adapted for water sports boards, e.g. for windsurfing or kitesurfing
    • B63H8/10—Kite-sails; Kite-wings; Control thereof; Safety means therefor
    • B63H8/12—Kites with inflatable closed compartments
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H8/00—Sail or rigging arrangements specially adapted for water sports boards, e.g. for windsurfing or kitesurfing
    • B63H8/10—Kite-sails; Kite-wings; Control thereof; Safety means therefor
    • B63H8/14—Ram-air kites, i.e. kites at least partly inflated by air entering their leading edges during use
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H8/00—Sail or rigging arrangements specially adapted for water sports boards, e.g. for windsurfing or kitesurfing
    • B63H8/10—Kite-sails; Kite-wings; Control thereof; Safety means therefor
    • B63H8/16—Control arrangements, e.g. control bars or control lines

Definitions

  • a first part of the idea of the invention relates to a (hand-supported) wing rig for wind-powered sports, such as foil surfing, according to the preamble of patent claim 1.
  • wing rig also known as a “foil wing” or “wing foil”, is a type of wing that is designed similar to a kite with a front tube that forms a leading edge and a central center strut that is preferably inflatable are.
  • a rigid wing rig is shown in US Pat.
  • the leading edge is curved in an arc shape as seen in a plan view.
  • the tree is supported by a multitude of struts at the leading edge. These struts are designed in such a way that they are the leading edge in a front view, i. i.e. seen in the direction of flow of the wing rig - impart a concave structure in which the end sections (tips) of the wing rig are issued upwards from a central apex of the leading edge.
  • a disadvantage of this solution is that due to the complex structure of the boom and the leading edge, the total weight of the wing rig is very high, so that it can only be used in water sports with the appropriate buoyancy devices. Another disadvantage is that the assembly and disassembly of the wing rig takes a long time due to the complex tubular structure. The hard tube structure of the leading edge and the tree also entails a considerable risk of injury to the user in the event of a skidding fall, and the aerodynamics of this rig are not optimal due to the complex structure.
  • the solutions mentioned at the outset have prevailed, in which the wing rig is designed with an inflatable center strut on which straps are designed for holding.
  • These concepts are characterized by low weight and comparatively high lift, but do not meet higher requirements in terms of aerodynamics.
  • these wing rigs are usually guided by hand, with the employment of the wing rig in relation to the wind always having to be changed depending on the wind strength and wind direction and the planned maneuver.
  • the grip position in particular the rear hand on the trailing edge side, can change.
  • the hand straps that are usually provided make such a change in the holding position more difficult.
  • WO 2020/152198 A1 which also goes back to the applicant, describes an improved wing rig in which a rigid boom is used instead of or in addition to an inflatable center strut, which significantly facilitates handling, since this boom can be gripped according to the surfer's preference and this does not have to be based on the usually provided straps.
  • DE 102020 122 143 describes a wing rig with a stiffened leading edge.
  • DE 102020 122 145 discloses a wing rig in which the inflatable Center strut recessed grips are formed, which are overstretched by handles. Exchangeable handles are described in DE 102020 121 553.
  • the object of the invention is to develop a wing rig with improved propulsion or flight characteristics.
  • the hand-guided wing rig (wing) has an inflatable front tube forming a leading edge and a rigid or inflatable center strut, with at least one handle optionally being arranged on the latter. In principle, mixed forms of at least one handle/tree and an inflatable center strut can also be realized.
  • the center strut and the front tube together span a canopy.
  • a radially protruding profile lip referred to below as a spoiler profile, is formed and extends along a partial area of the leading edge/front tube approximately transversely to the center strut. This is preferably designed in such a way that flow separation occurs in the area provided with the spoiler profile.
  • the spoiler profile (profile lip) thus has a similar effect to a spoiler.
  • this spoiler profile which is located in the inflow/flow area around the wing rig, significantly improves the performance of the wing rig compared to conventional solutions. So the handling of the wing rig during a turn could be significantly simplified with the spoiler profile according to the invention, since the buoyancy of the wing rig is greater than in conventional solutions and This simplifies the change of grip during the turn.
  • the rolling of the wing rig during this turn is also simplified by the improved aerodynamics according to the invention.
  • the roll or pitch stability of the wing rig could also be improved during travel / flight, the latter even being able to be turned from negative to positive (unstable to stable) compared to conventional solutions.
  • Another advantage is that the wing rig can be held very stably on the leash or on a handle, for example when riding down a wave.
  • the driving speed could be significantly increased compared to a conventional wing rig.
  • the spoiler profile is formed on the underside, i.e. the side (underside) of the leading edge or the wing rig or the front tube that faces the user/the surfer and is preferably approximately tangentially flown to during use.
  • the spoiler profile is in the apex area of the leading edge of the wing rig, i.e. in the area that is flown about tangentially during use.
  • the spoiler profile follows, at least in sections, approximately the contour of the leading edge of the wing rig in its longitudinal direction.
  • the spoiler profile can be designed to be continuous or interrupted in certain areas.
  • the aerodynamics are further improved if the spoiler profile has a height of less than 15 mm, preferably less than 10 mm, in relation to an outer skin of the front tube.
  • the spoiler profile preferably has a height of more than 5 mm.
  • the spoiler profile is also selected as a function of the material of the outer skin.
  • the height of the spoiler lip can be greater than or equal to 5 mm, preferably greater than or equal to 6 mm.
  • the height is preferably somewhat greater than with woven materials and can then be in the range of >7 mm, preferably >8 mm.
  • the spoiler profile is formed by a seam that can be covered by an outer skin or a reinforcement. This seam can then also form the closing seam of the outer skin.
  • the base material (textile/laminate/foil) of the front tube consists, for example, of a laminate/foil material that is designed with textile (Dacron ® ) reinforcements in the seam area
  • the height of the spoiler profile preferably corresponds at least to the height of the base material in the seam area and is preferably enlarged accordingly in the reinforced areas.
  • the canopy and also the front tube of the wing rig are usually composed of several panels. Accordingly, the seam forming the spoiler profile can be somewhat higher in the area of the panel segment transitions, which are also joined together again by seams, than in the adjoining areas.
  • the seam and thus the spoiler profile can essentially have a height of about 5 mm (or 6 mm) and then a little higher in the area of the segment transitions between the panels, for example with a height of 5.5 mm (6.5 mm) be executed.
  • the seam height is preferably somewhat higher, as explained, so that it is predominantly 7 mm, for example, and a spoiler profile height of 7.5 mm then occurs in the segment transition due to the material doubling.
  • the spoiler profile can therefore be designed, for example, as a seam, optionally with a doubling of material, a cover or the like.
  • a spoiler profile body is attached to the front tube of the wing rig.
  • This can for example a plastic/keder profile which is connected in a suitable manner to the outer skin of the front tube or is formed in one piece on this.
  • this spoiler profile can be fixed in position by gluing and/or sewing.
  • the spoiler profile is formed by a profile body that is covered by a cover.
  • This cover improves aerodynamics and also ensures improved positional fixation.
  • the spoiler profile extends in the area of the front tube that lies between the tips of the wing rig.
  • the spoiler profile can be designed in such a way that it causes a stall or a change in flow (laminar/turbulent) on the underside of the wing rig.
  • the spoiler profile is not rounded but forms a stall edge.
  • the spoiler profile is provided with an adhesive layer for subsequent attachment to a conventional wing rig. Accordingly, the spoiler profile can then be designed with a broadened base.
  • kite for wind-powered sports such as kite surfing
  • kite surfing a kite for wind-powered sports
  • Conventional kites used for kite surfing or land kiting are designed either as tube kites or as mats with chambers that can be filled by the incoming flow.
  • tube kites have the great advantage that they swim when they crash and can therefore be launched again without major problems.
  • Tube kites usually have a support structure with an inflatable front tube and inflatable struts arranged transversely thereto, which together span a canopy.
  • a tube kite is sold, for example, by the applicant under the Rebel® brand.
  • Different versions of this concept are described in the publications DE 202004005792 U1 or DE 102004042669 A1.
  • Kites that place high demands on maintaining the predetermined aerodynamically optimized profile during different maneuvers typically use multiple struts to stabilize the flow profile. With lighter kites, fewer struts are usually used, with a single center strut being sufficient, for example. There are also solutions without struts on the market.
  • the object of the invention is to develop a kite with improved flight characteristics.
  • the kite according to the invention has an inflatable front tube forming a leading edge and preferably at least one inflatable strut.
  • the strut(s) and the front tube together span a canopy.
  • a radially protruding profile lip referred to below as a spoiler profile, is formed and extends along a partial area of the leading edge/front tube approximately transversely to the center strut. This is preferably formed in such a way that flow separation occurs in the area provided with the spoiler profile.
  • the spoiler profile (profile lip) thus has a similar effect to a spoiler.
  • the spoiler profile is formed on the underside, i.e. the side (underside) of the leading edge (front tube) of the kite that faces the user and is preferably approximately tangentially flown to during use.
  • the spoiler profile is preferably located in the apex area of the leading edge of the kite, i.e. in the area that is roughly tangentially flowed during use.
  • the spoiler profile roughly follows the contour of the leading edge of the kite in its longitudinal direction, at least in sections.
  • the spoiler profile can be designed to be continuous or interrupted in certain areas.
  • the aerodynamics are further improved if the spoiler profile of the kite has a height of less than 15 mm, preferably less than 10 mm, in relation to an outer skin of the front tube. This means that the projection of the spoiler profile over this outer skin is relatively small. More preferably, the spoiler profile of the kite has a height of more than 3 mm.
  • the spoiler profile is also selected as a function of the material of the outer skin.
  • the height of the spoiler lip can be greater than or equal to 3 mm, preferably greater than or equal to 5 mm.
  • the height is preferably slightly greater than with woven materials and can then be in the range of >5 mm, preferably >6 mm, more preferably > 7 mm, lying.
  • the spoiler profile is formed by a seam that can be covered by an outer skin. This seam can then also form the closing seam of an outer skin of the front tube.
  • the height of the spoiler profile preferably corresponds at least to the height of the base material (textile/laminate/foil) in the seam area and is more preferably correspondingly enlarged in the reinforced areas.
  • the canopy and the front tube are usually composed of several panels. Accordingly, the seam forming the spoiler profile can be somewhat higher in the area of the panel segment transitions, which are also joined together again by seams, than in the adjoining areas.
  • the seam and thus the spoiler profile can essentially have a height of about 3 mm (or 5 mm) and then somewhat higher in the area of the segment transitions between the panels, for example with a height of 3.5 mm (5.5 mm).
  • the seam height is, as explained, preferably somewhat higher, so that it is, for example, predominantly 5 mm and a spoiler profile height of 5.5 mm then occurs in the segment transition due to the material doubling.
  • the spoiler profile can in turn be designed as a seam, optionally with a material doubling, cover or the like.
  • a spoiler profile body is attached to the front tube.
  • This can be a plastic/keder profile, for example, which is suitably connected to the outer skin of the front tube or is formed in one piece on it.
  • this spoiler profile can be fixed in position by gluing and/or sewing.
  • the spoiler profile is in turn formed by a profile body that is covered by a cover.
  • This cover improves aerodynamics and also ensures improved positional fixation.
  • the spoiler profile extends in the area of the front tube that lies between the tips of the kite.
  • the spoiler profile can be designed in such a way that it causes a stall or a change in flow (laminar/turbulent) on the underside of the kite.
  • the spoiler profile is not rounded, but rather forms a stall edge.
  • the spoiler profile is provided with an adhesive layer for subsequent attachment to a conventional kite. Accordingly, the spoiler profile can then be designed with a broadened base. Furthermore, it is expedient if several spoiler profile sections are arranged at a distance from one another and/or are designed with different heights (h).
  • FIG. 1 shows a schematic representation of a wing rig that is used to drive a foil board
  • FIG. 2 shows a partial bottom view of a wing rig according to the invention according to a first embodiment
  • FIG. 3 shows a detailed illustration of the wing rig according to FIG. 2;
  • FIG. 4 shows a second exemplary embodiment of a wing rig according to the invention with a spoiler profile covered by a cover;
  • FIG. 5 shows an exemplary embodiment in which the spoiler profile is formed by a seam structure
  • FIG. 6 shows a detailed view of a spoiler profile with a radially positioned seam structure
  • FIG. 7 shows a basic representation of a kite
  • FIG. 8 shows a partial bottom view of a kite according to the invention.
  • FIG. 9 shows a detailed representation of a spoiler profile with a radially positioned seam structure.
  • FIG. 1 shows the use of a wing rig 1 according to the invention (also called “wing”, “foil wing” or “wing foil”) for driving a foil board 2 .
  • a surfer 4 usually holds the wing rig 1 with his hands and adjusts it in relation to the wind depending on the desired direction of travel (upwind, downwind, downwind) or on the lift to be set, for example when jumping or adjusting the ride height.
  • the wing rig 1 has an inflatable front tube 6 with an inflow-side leading edge 7, which is approximately arcuate in plan view (from above in Figures 1 and 2), preferably approximately delta-, C- or U-shaped and with their Tips 8, 10 extending to a trailing edge 12 of a canopy 14 of the wing rig 1.
  • this canopy 14 is used on the one hand by the Front tube 6 and on the other hand from a tree/or a center strut 20 (see Figure 2) stretched.
  • the surfer 4 holds the wing rig 1 mainly on the tree/centre strut 20, which protrudes downwards (view according to FIG. 1).
  • the front tube 6 is preferably both in the top view and in a front view - seen in the inflow direction - approximately V-shaped or U-shaped employed, with the V / U in the front view upwards, ie widened away from the surfer 4 .
  • the trailing edge 12 and thus the entire canopy surface is also set in a V (or U) shape when viewed from the front.
  • a flandle that is arranged centrally in the area of the front tube 6 is identified by the reference number 16 .
  • This flange 16 is gripped, for example, when the wing rig 1 is held downwind while sailing on a wave without propulsion.
  • This handle 16 is also used when handling the wing rig 1 on land or when starting or ending a trip (water landing). As explained below, further handles can be positioned on the wing rig 1.
  • a safety leash 17 is also shown in the illustration according to FIG.
  • FIG. 2 shows a view from below of the wing rig 1, in which one can see a center strut 20 which is connected to the front tube 6 in the region of a crest 22 of the latter.
  • the center strut 20 is designed to be inflatable, with filling taking place via a one-pump system 25, via which the front tube 6 is also inflated.
  • Removable handles 24 are fastened to the center strut 20, the basic structure of which is described in DE 102020 121 553 mentioned at the outset.
  • These handles 24 are made of a dimensionally stable material, for example made of fiber-reinforced plastic, and are screwed to the center strut 20 in a detachable manner via an adapter 26 .
  • two handles 24 are provided.
  • handles can be arranged.
  • another handle 16 is fastened in the region of the apex 22 , this being made of a flexible material and being fastened to the front tube 6 .
  • an exchangeable handle 24 can also be arranged in this area.
  • the front tube 6 curves approximately in a U or C shape towards two tips 8, 10, which in the illustrated wing rig 1 are not curved or are much less curved than the curved front tube section 34 running to the apex 22.
  • the wing rig 1 can also be designed with a different front tube geometry.
  • a spoiler profile 36 also known as a bead or "boundary layer Trip Strip (BLTS)" called - which protrudes towards the viewer over the outer skin 38 of the front tube 6 in the representation according to FIG.
  • the spoiler profile 36 is designed as a plastic profile which is connected to the front tube 6, in particular the outer skin 38 of the front tube 6, in a suitable manner. This connection can be made, for example, by gluing, sewing or by suitably designing the front tube 6 .
  • the spoiler profile 36 can be formed continuously or from spoiler profile sections spaced apart from one another.
  • the spoiler profile 36 can also be designed with different heights to optimize the stall.
  • this spoiler profile 36 extends, as mentioned above, from the apex 22 to the tips 8, 10. No spoiler profile 36 is provided in this area, since these tips 8, 10 are arranged more or less in the direction of flow.
  • the cross section of the spoiler profile 36 is shown schematically in section XX of FIG.
  • the outer skin 38 of the front tube 6 can be seen, which preferably surrounds a bladder 40 in a manner known per se. If the outer skin 38 is designed to be gas-tight, the bladders 40 can also be dispensed with.
  • the cross-sectional profile of the front tube 6 is approximately circular or oval.
  • the spoiler profile 36 is placed in the area remote from the canopy 14 . In the exemplary embodiment shown, this is designed as a plastic profile body with a comparatively wide base 42 along which the spoiler profile 36 is connected to the outer skin 38 . As explained, this connection can be made by gluing, sewing or the like.
  • the spoiler profile 36 tapers from the base 42 to a spoiler lip 44 / spoiler lip, which is relatively sharp-edged in the illustrated embodiment, so that when the wing rig 1 is used, the one provided with the reference number 46, which is approximately tangential to this area of the leading edge 7 flow breaks off and/or changes from a largely laminar flow into a turbulent area and/or the flow separates downstream of the spoiler profile 36 .
  • the height h of the spoiler profile 36 is preferably higher than 5 mm in the case of an outer skin 38 made of Dacron® . In principle, other dimensions can also be used.
  • the tear-off edge 44 is relatively sharp-edged. In principle, this can also be somewhat rounded.
  • the profile of the spoiler profile 36 is also in no way limited to the shape shown, but the profiling can also take place in another way in order to achieve the desired effect (for example flow separation, flow detachment or laminar/turbulent flow changeover).
  • FIG. 3 shows an enlarged representation of the wing rig 1, in which one can clearly see that the spoiler profile 36 extends only up to the tip 8 (or 10).
  • the oncoming flow 46 with the stall caused by the spoiler profile 36 is shown again schematically.
  • the broadened base 42 and the tapered tear-off edge 44 can also be seen in this representation.
  • FIG. 4 shows an exemplary embodiment of a wing rig 1 which, in principle, has the same structure as the wing rig 1 shown in FIGS.
  • the main difference between the two variants is that, in the embodiment according to FIG. This can be designed, for example, in the manner of a tape that fixes the spoiler profile 36 in position on the outer skin 38 of the front tube 6 and covers it. Also in this embodiment, the spoiler profile 36 extends into the area of the two tips 8, 10.
  • Such a variant is particularly well suited for retrofitting conventional wing rigs 1, for example the spoiler profile 36 can be integrated into the cover 48, so that the inventive Spoiler profile 36 can be attached in the manner of an adhesive tape. Of course, in addition or as an alternative, it can also be sewn or fixed in some other way.
  • FIG. 5 shows an exemplary embodiment in which the spoiler profile 36 is integrated into the outer skin 38 of the front tube 6, so to speak.
  • a seam 50 of the outer skin 38 is formed in the area of the front tube 6 in which the stall (or other change in flow) is to occur. As explained, this area is formed at a distance from the canopy 14 on the underside of the leading edge 7 pointing towards the viewer in FIG. As explained above, this seam 50 is located in the area of the leading edge 7 where the flow is approximately tangential.
  • the seam 50 can be formed by doubling the material or positioning according to Figure 6, and the seam geometry can be designed in such a way that a gap away from the outer skin 38, approximately in Radial direction projecting spoiler profile 36 is formed, the stall generated. Accordingly, the seam 50 is selected in such a way that a desired stall or other flow reversal is produced.
  • longitudinal edge regions 52, 54 of the outer skin 38 sewn together are inclined outwards approximately in the radial direction, so that the spoiler profile 36 is formed by the radially projecting, inclined longitudinal edge regions 52, 54. These can still be covered with a cover to avoid damage.
  • the outer skin 38 can be made of a textile material such as Dacron® or a laminate or foil construction such as Aluula® . In the case of a laminate/foil structure, it is preferred if the height h of the spoiler profile 36 is somewhat greater than in the case of textile materials.
  • the front tube 6 and/or the canopy 14 is usually formed from a number of panels/segments which are also sewn together.
  • the spoiler profile 36 can then have a greater height than in the adjacent areas. These elevations formed because of the segment transitions are, for example, in the range between 0.5 mm and 1 mm or more (depending on the material thickness). If, for example, a spoiler profile height of about 5 mm were selected for a textile material, the height in the area of the segment transition would then be 5.5 mm or more.
  • the spoiler profile 36 is preferably designed with a somewhat greater height, which is then approximately in the range of 7.0 mm, so that there is a profile height of 7.5 mm or more in the area of the segment transition.
  • the front tube 6 consists, for example, of a laminate/foil material that is reinforced in the seam area by textile strips (e.g. Dacron ® )
  • the seam height and thus the height h of the spoiler profile 36 corresponds at least to the height of the base material im seam area.
  • the spoiler profile 36 is optimally arranged in the lower area, preferably in the area of the front tube 6 against which the flow is approximately tangential, so that the stall occurs in the predetermined manner.
  • a course of the seam in the lower area of the front tube 6 with a profiling that produces a spoiler profile 36 is likewise without precedent in the prior art.
  • this seam 50 also extends into the tips 8 (10).
  • the exemplary embodiment according to FIG. 5 corresponds to the exemplary embodiments described above, so that further explanations are unnecessary.
  • the center strut 20 is designed to be inflatable.
  • an embodiment with a rigid boom or a hybrid form with a center strut 20 and a boom can also be used.
  • a trapeze line or handle can be attached to the two handles 24, so that the wing rig 1 can then also be guided/held using a trapeze belt or with one hand.
  • a hand-supported wing rig 1 with a spoiler profile 36 is disclosed, which is formed approximately in the lower area of the leading edge 7 where the flow is tangential.
  • kite 101 The basic structure of a tube kite—hereinafter referred to as kite 101—is explained with reference to FIG.
  • kite 101 has a support structure 102 with a front tube 104 that forms a leading edge 103 .
  • a multiplicity of struts 108 running towards a trailing edge 106 are fastened to this front tube 104 .
  • This support structure 102 with the front tube 104 and five struts 108 spans a canopy 110 that forms the actual kite surface.
  • a plurality of batten-shaped stiffening elements 112 are provided in the area of the trailing edge 106 .
  • profile stabilization elements 114 can also be provided in the area of the front tube 104, which profile the inflow area.
  • stabilizing elements are disclosed, for example, in DE 202005018317 U1 by the applicant.
  • the kite 101 is connected to the surfer via two front lines (not shown) and two control lines, which are attached to tips 115 of the kite 101, and to a bar (not shown).
  • a spoiler profile 116 also known as a bead or “boundary layer trip strip” (BLTS)—is formed on the kite 101 in an area of the front tube 104 that is subjected to an approximately tangential flow. It is particularly preferred if this spoiler profile 116 is formed in the lower areas of the front tube 104 pointing towards the bar. In principle, such a spoiler profile 116 can also be designed additionally or alternatively on the canopy side.
  • BLTS boundary layer trip strip
  • FIG. 8 shows a bottom view of the kite 101, in which one can see a center strut 108 which is connected to the front tube 104 in the region of a crest 118 of the latter.
  • the front tube 104 and the struts 108 are filled via a one-pump system 136, via which the front tube 104 is also inflated.
  • the spoiler profile 116 is designed as a plastic profile in the exemplary embodiment shown, which is connected in a suitable manner to the front tube 104, in particular to the outer skin 120 of the front tube 104.
  • the spoiler profile 116 can be formed continuously or from spoiler profile sections spaced apart from one another.
  • the spoiler profile 116 can also be designed with different heights to optimize the stall.
  • this spoiler profile 116 extends, as mentioned above, from a crest 118 (Are) to the tips 115.
  • the cross section of the spoiler profile 116 is shown schematically in section XX of FIG.
  • the cross-sectional profile of the front tube 104 is approximately circular or oval.
  • the spoiler profile 116 is fitted in the area remote from the canopy 110 . In the exemplary embodiment shown, this is designed as a plastic profile body with a comparatively wide base 124 along which the spoiler profile 116 is connected to the outer skin 120 . As explained, this connection can be made by gluing, sewing or the like.
  • the spoiler profile 116 tapers from the base 124 to a tear-off edge 126, which is relatively sharp-edged in the illustrated embodiment, so that when the kite 101 is in use, the inflow provided with the reference number 128 and running approximately tangentially to this area of the leading edge 103 breaks off and/or changes from a largely laminar flow into a turbulent area and/or the flow separates downstream of the spoiler profile 116.
  • this flow change in the area of the underside of the leading edge 103 / front tube 104 significantly improves the aerodynamics of the kite 101 compared to conventional solutions, so that on the one hand higher driving speeds can be achieved and on the other hand the "flight stability" is significantly improved is.
  • the height h of the spoiler profile 116 is preferably higher than 3 mm in the case of an outer skin 120 made of Dacron® . In principle, other dimensions can also be used.
  • the tear-off edge 126 is relatively sharp-edged. In principle, this can also be somewhat rounded.
  • the profile of the spoiler profile 116 is also in no way restricted to the shape shown, but the profiling can also be carried out in a different way in order to achieve the desired effect (for example flow separation, flow detachment or laminar/turbulent flow changeover).
  • FIG. 9 shows an exemplary embodiment in which the spoiler profile 116 is integrated into the outer skin 120 of the front tube 104, so to speak.
  • a seam 130 of the outer skin 120 is formed in the area of the front tube 104 in which the stall (or other change in flow) is to occur. As explained, this area is formed at a distance from the canopy 110 on the underside of the leading edge 103 pointing towards the viewer in FIG. As described, this seam 130 is located in the area of the leading edge 103 where the flow is approximately tangential.
  • the seam 130 can be implemented by doubling the material or positioning and correspondingly designing the seam geometry such that a spoiler profile 116 is formed which protrudes away from the outer skin 120, approximately in the radial direction , which causes the stall. Accordingly, the seam 130 is selected in such a way that a desired stall or other flow reversal is produced.
  • longitudinal edge regions 132, 134 of the outer skin 120 sewn together are inclined outwards approximately in the radial direction, so that the spoiler profile 116 is formed by the radially projecting, inclined longitudinal edge regions 132, 134. These can still be covered with a cover to avoid damage.
  • the skin 120 may be made of a textile material such as Dacron® or a laminate or foil construction such as Aluula® . In the case of a laminate/foil structure, it is preferred if the height h of the spoiler profile 116 is somewhat greater than in the case of textile materials.
  • a bladder 122 can be dispensed with, particularly when using a laminate/foil structure (for example Aluula®).
  • the front tube 104 and/or the canopy 110 is usually formed from a number of panels/segments which are also sewn together.
  • the spoiler profile 116 can then have a greater height than in the adjacent areas.
  • These elevations formed because of the segment transitions are, for example, in the range between 0.5 mm and 1 mm or more (depending on the material thickness). For example, if you were to use a textile material, you would have a spoiler profile height of about 3 mm choose, the height in the area of the segment transition could then be 3.5 mm or more.
  • the spoiler profile 116 is preferably designed with a somewhat greater height, which is then approximately in the range of 5.0 mm, so that there is a profile height of 5.5 mm or more in the area of the segment transition.
  • the front tube 104 consists, for example, of a laminate/foil material that is reinforced in the seam area by textile strips (e.g. Dacron ® )
  • the seam height and thus the height h of the spoiler profile 116 corresponds at least to the height of the base material im seam area.
  • the spoiler profile 116 is optimally arranged in the lower area, preferably in the area of the front tube 104 against which the flow is approximately tangential, so that the stall occurs in the predetermined manner.
  • a course of the seam in the lower area of the front tube 104 with a profiling that produces a spoiler profile 116 is without precedent in the prior art.
  • this seam 130 also extends into the tips 115 .
  • the spoiler profile 116 can also end in front of the tips 115.
  • a kite 101 with a spoiler profile 116 is disclosed, which is formed approximately in the lower area of the leading edge 103 where the flow is tangential.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)

Abstract

L'invention concerne un gréement (1) à main comprenant un profil spoiler (36) qui est formé approximativement dans la zone inférieure, parcourue tangentiellement, du bord d'attaque (7). L'invention concerne en outre une aile (101) pourvue d'un profil spoiler (116) qui est formé approximativement dans la zone inférieure, parcourue tangentiellement, du bord d'attaque (103).
EP22722453.2A 2021-04-15 2022-04-12 Gréement et aile Pending EP4323272A1 (fr)

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
DE102021109487 2021-04-15
DE102021112344 2021-05-11
DE102021116387 2021-06-24
DE202021103570 2021-07-02
DE102021125438.8A DE102021125438A1 (de) 2021-04-15 2021-09-30 Flügelrigg
DE202021105301.1U DE202021105301U1 (de) 2021-04-15 2021-09-30 Kite
PCT/EP2022/059705 WO2022218959A1 (fr) 2021-04-15 2022-04-12 Gréement et aile

Publications (1)

Publication Number Publication Date
EP4323272A1 true EP4323272A1 (fr) 2024-02-21

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP22722453.2A Pending EP4323272A1 (fr) 2021-04-15 2022-04-12 Gréement et aile

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Country Link
US (1) US12195159B2 (fr)
EP (1) EP4323272A1 (fr)
WO (1) WO2022218959A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3148991A1 (fr) * 2023-05-22 2024-11-29 Teiva CANTIRAN Dispositif d'aile gonflable

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2501618B1 (fr) 1981-03-11 1985-10-04 Le Bail Roland Voile a effet propulseur et de sustentation variable
US4927100A (en) * 1988-11-11 1990-05-22 Patrician Corporation Airfoil configuration
US5448961A (en) 1992-07-13 1995-09-12 Ansteensen; Erik User supported portable sail
FI933666A0 (fi) * 1993-08-20 1993-08-20 Skywings Ab Oy Draksegel
DE19908223A1 (de) 1999-02-25 2000-08-31 Flight Design Gmbh Tragflügel für Fluggeräte
DE102004042669B4 (de) 2003-12-17 2010-12-23 Boards & More Ag, Clarens Tubekite
DE202004005792U1 (de) 2004-04-08 2004-06-24 Boards & More Ag, Clarens Kite
DE102004051708A1 (de) 2004-10-23 2006-04-27 Steffen Born Variabel nutzbarer Vorflügel für Zugdrachen
DE102005002941A1 (de) 2004-12-31 2006-07-20 Steffen Born Venturi Vorflügel
DE202005018317U1 (de) 2005-02-23 2006-04-13 Boards & More Ag, Clarens Tubekite
US10336412B2 (en) * 2015-10-01 2019-07-02 Clayton Morris Adjustable area kite or wing
DE102019101656A1 (de) 2019-01-23 2020-07-23 Boards & More Gmbh Flügelrigg
DE102020122143A1 (de) * 2019-10-31 2021-05-06 Boards & More Gmbh Flügelrigg
DE102020122145A1 (de) 2019-10-31 2021-05-06 Boards & More Gmbh Flügelrigg
DE102021106993B4 (de) 2020-08-17 2024-10-31 Boards & More Gmbh Flügelrigg

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WO2022218959A1 (fr) 2022-10-20
US12195159B2 (en) 2025-01-14
US20240190547A1 (en) 2024-06-13

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