WO2006123054A1 - Fin unit with elastic attachment system on an underside of a marine apparatus - Google Patents
Fin unit with elastic attachment system on an underside of a marine apparatus Download PDFInfo
- Publication number
- WO2006123054A1 WO2006123054A1 PCT/FR2006/001122 FR2006001122W WO2006123054A1 WO 2006123054 A1 WO2006123054 A1 WO 2006123054A1 FR 2006001122 W FR2006001122 W FR 2006001122W WO 2006123054 A1 WO2006123054 A1 WO 2006123054A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fin
- assembly according
- elastic
- board
- insert
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B32/00—Water sports boards; Accessories therefor
- B63B32/60—Board appendages, e.g. fins, hydrofoils or centre boards
- B63B32/66—Arrangements for fixation to the board, e.g. fin boxes or foil boxes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B32/00—Water sports boards; Accessories therefor
- B63B32/60—Board appendages, e.g. fins, hydrofoils or centre boards
- B63B32/64—Adjustable, e.g. by adding sections, by removing sections or by changing orientation or profile
Definitions
- the present invention relates to a fin assembly with elastic attachment system on the hull of a watercraft such as windsurfing, kite surfing, fly surfing, wake board, knee board and especially a surfboard.
- Surfboards are usually equipped with one or more fins, more commonly three, attached to the back of the board, on the hull (bottom surface of the board).
- Two fixing methods exist one is to stick the fins on the board to make them integral, the other is to have removable and interchangeable fins via a housing or a mounting insert incorporated in the board.
- Traditional fins are usually made using a plate composed of a multitude of layers of glass fabric and resin, machined or shaped by hand. They are then made integral with the board by gluing with glass fabrics, unidirectional fiber and resin. This method of attachment allows to establish at the root a peripheral connection fillet to improve the hydrodynamic characteristics at the base of the fins.
- the presence of the fins attached to the board during the manufacturing finishing stages leads to an increase in the duration of this operation and therefore the cost of labor, as well as an increase in weight and a reduction in the quality finishing of the board around the location of the fins.
- many manufacturers have started to manufacture removable fins systems because they have many advantages, firstly for surfers who following the type of sport use several types of fins with the same board.
- board builders looking for a quick installation of fins and a less bulky and easier storage of boards in the warehouse or during transport.
- the boards are most commonly equipped with fins made of a thermo plastic material reinforced with glass powder. They are heavy and have low mechanical properties compared to traditional fins when subjected to bending stress. To obtain the best performance in the wave, during the various stages of manufacturing a board, the designer pays particular attention to the distribution of the volume and the balancing thereof with respect to its master torque.
- the weight thereof causes a shift towards the rear of the center of gravity with respect to the desired optimal position.
- the disappearance of the fillet represented by a mass of resin at the base of the drift, reduces the hydrodynamic performance by generating in some configurations untimely recesses of the fluid and a loss of control of the board by the surfer.
- the fins are held in position on the board by a system provided with one or more screws which block them in place in the inserts, as described in the patent FR 2,691,943.
- frequent assembly / disassembly of the fin or too high a tightening torque of the screw can damage the thread in the plastic insert, or even alter the hex head of the screw. This malfunction may result in the loss of the fin or an inability to assemble / disassemble it from the board.
- the invention aims to facilitate the conduct of the board by a surfer by having removable fins whose constitution, shape and mounting on the board, on the one hand, to obtain an improvement in hydrodynamic performance by reducing vortex / vibration formations and secondly, to increase the range of evolution in waves in the marine environment.
- this object is achieved by making the fin semi-articulated or partially self-orientable in its evolution in a fluid medium, in order to repel the hydrodynamic stall caused by the crossing of large turbulences and / or strong movements Laterally printed by the surfer in extreme evolution, thanks to elastic attachment means combined with the advanced position of the center of gravity G to the leading edge and the shape of the profile at the root of the fin.
- the fin assembly with elastic fastening system according to the invention has a number of advantages. Since the fin is mounted semi-articulated on the board, in addition to improving the hydrodynamic performance, it also improves the life of the assembly with respect to mechanical shocks or hydrodynamic fluctuations, which are amortized by the elastic fastening system.
- Figure 1 is a plan view showing the main components between wing and hull.
- Figure 2 is a section of Figure 1 showing the shape of the profile, the post and the insert.
- Figure 3 shows the flap in the working configuration in the liquid element with its associated swirling flows.
- Figure 4 is a bottom view of the board equipped with three fins.
- Figure 5 is a rear view of the board.
- Figure 6 is a perspective view of the aileron / insert assembly.
- FIG. 7 is a rear view of the wing seen side trailing edge.
- - Figure 8 shows various shapes and surface condition of studs.
- FIG. 9 is a perspective view of the insert mounted in the board.
- FIG. 10 is a view of the insert with its angular template mounted in the board.
- Figure 1 shows the entire assembly of the fin (2) on the hull (1).
- the fin is equipped with at least one pin (3) which is inserted into an insert (5) connected to the hull
- the mechanical assembly thus defined represents the so-called resilient fastening means (3-4-5-27). They bring a partial mobility of the aileron around the axis OZ in yaw M z and around the axis OX in roll M x .
- the root profile comprises a thickening (7) of the trailing edge (8) of a value equal to or less than the thickness of the master torque located at about 25% of the chord of the profile.
- This thickening (7) is built on a height h of value at least equal to that of the marten couple me.
- the fin equipped with tenon (3) is constructed in such a way that it can float in the water. It consists of a filling core (16) of the profile in a very light material covered with a skin (17) of high strength with a strengthening of the leading edge (15) in successive layers. As needed, the fin will be equipped with a ballast (6) for two essential reasons. Namely, the first; to position the center of gravity G of the fin close to the root (9) and in front of the axis OZ, the second; to adjust the eigenfrequencies H x and
- FIG. 3 makes it possible to explain how the fin (2) reacts when it is subjected to more or less laminar and fluctuating flows. Indeed, for a given speed V and an angle of incidence i the aileron is subjected to a lift P and a drag T whose center of action O 'is at the rear of the axis OY of the 'attached.
- this shape limits the stalls due to the imperfections of junction of the drift / hull surfaces and thus also limits the displacement of the thrust center towards the leading edge of the fin.
- the position of the center of gravity G which will most often be adjusted by means of a ballast (6) so that the inertial forces related to the axes OX and OY generate, during the acceleration of the speed ⁇ V, a rotation of the fin in the direction of a decrease in the incidence.
- the fin in the case of extreme evolutions or important variations of velocity ⁇ V with high incidence, is self-adjustable in incidence by the fact that the link tenon (3) / insert (5) is elastic and the inertial actions, applied to the center of gravity G and the hydrodynamic actions applied to the center of thrust 0 ', induce moments of yaw M z and roll M x which counteract the effect burst by the angular variations ⁇ i and ⁇ j.
- the post (3) according to the assemblies, may be circular or rectangular section or more or less elliptical section as in Figure 2.
- the disassembly of the fin is effected by pulling it along the axis OZ while pressing on a marked point of the insert to disengage the elastic lamella or the pin from the notch of the tenon.
- the fin in another embodiment may be locked in position by a cord (11) fixed at the end of tenon or on the base (9) of the fin.
- This cord passes through the thickness of the board to be fixed and stretched by an elastic (12) located and hooked (13) in a groove (14) formed in the deck of the board.
- FIG. 6 represents another type of embodiment according to which the fin (2) is attached to the hull (1) by two pins (3a-3b) inserted into two mortises (19a-19b) of a non-elastic material.
- the mortises each comprise inside one or more rings of elastic material (18a-18b) so that the tenons once introduced are held by radial pressure of the rings, which however allow a slight elastic movement of the fin (around axes OX and OZ) in the games left between the diameter of the tenons and that of the mortises.
- the position of the Oz axis is between the pins axes (3a-3b). But in the case where we want to adjust the OZ axis closest to the pin axis (3a) just use different elastic deformation rings under the same effort.
- FIG 8 shows various pins that can be used.
- the tenon is an insert during the manufacture of the fin (2) whose material used is either a stainless steel or titanium, or a composite.
- the post comprises, on the outside, a smooth or serrated or knurled surface to reinforce the resistance of the assembly with the one or more rings (18a-18b) and inside a tubular cavity (22) where a flexible link (23) is housed safety device connecting one and the other of the two ends (24-25) of the tenon which in case of breakage makes it possible not to lose the drift in the fluid medium.
- Figure 9 shows the insert (5) mounted in the board. It is a kind of cage made of very hard material including outside protruding parts (26) for docking and gluing in the hull (1).
- This assembly in a concern of economic gain to reduce the duration and to facilitate the installation thereof in the board, comprises, FIG. 10, an angular positioning template (30) composed of three arms (31-32a-32b) each equipped with a pin (33).
- the arm (31) of greater length than that of the arms (32a-32b) is provided with at least one breakable pin (34) dimensioned and reported at the angle ( ⁇ ) sought.
- This angle ( ⁇ ) is defined by the designer for the angular positioning of the lateral fins, it defines its original angular position.
- Each pin (34) represents an angular increment ( ⁇ ) comprised between 0.25 ° and 1 °, relative to the previous one.
- ⁇ angular increment
- the designer must break one or more pins (34) in order to obtain the angle which he wishes to apply to the fin, given by the flat support of the pin (34) and the pins ( 33).
- the use of a weight on the insert may be necessary during its installation by gluing in the board. Once the inserts secured to the board with the desired angle, a final grinding is performed to flush the insert to the hull of the board to eliminate all the projections, shown in the hatched portion (35) in the figure 10.
- the days or the interstices clearance between fin and hull will be filled by an elastic seal ( 21) glued on the hull or at the base of the fin.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Toys (AREA)
- Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
- Wind Motors (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2006248818A AU2006248818B2 (en) | 2005-05-18 | 2006-05-18 | Fin unit with elastic attachment system on an underside of a marine apparatus |
EP06764644A EP1893475A1 (en) | 2005-05-18 | 2006-05-18 | Fin unit with elastic attachment system on an underside of a marine apparatus |
US11/914,885 US20080268730A1 (en) | 2005-05-18 | 2006-05-18 | Fin Unit with Elastic Attachment System on an Underside of a Marine Apparatus |
BRPI0609886-0A BRPI0609886A2 (en) | 2005-05-18 | 2006-05-18 | ailerom set with nautical apparatus over-elastic connection system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0504957A FR2885875B1 (en) | 2005-05-18 | 2005-05-18 | WING ASSEMBLY WITH ELASTIC ATTACHMENT SYSTEM ON BOAT CARINE |
FR0504957 | 2005-05-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006123054A1 true WO2006123054A1 (en) | 2006-11-23 |
Family
ID=35636775
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2006/001122 WO2006123054A1 (en) | 2005-05-18 | 2006-05-18 | Fin unit with elastic attachment system on an underside of a marine apparatus |
Country Status (7)
Country | Link |
---|---|
US (1) | US20080268730A1 (en) |
EP (1) | EP1893475A1 (en) |
AU (1) | AU2006248818B2 (en) |
BR (1) | BRPI0609886A2 (en) |
FR (1) | FR2885875B1 (en) |
WO (1) | WO2006123054A1 (en) |
ZA (1) | ZA200710485B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9688365B2 (en) | 2012-07-09 | 2017-06-27 | Fin Control Systems Pty Limited | Fin plug for water craft |
US9957021B2 (en) | 2012-11-14 | 2018-05-01 | Fin Control Systems Pty. Limited | Fin plug for a water craft |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8083560B2 (en) * | 2009-06-05 | 2011-12-27 | Foulke Robert W | Pivotal surfboard fin assembly |
CN102666270A (en) * | 2009-11-10 | 2012-09-12 | 奥瑞根芬系统有限公司 | Fin collar with a fluid modification surface |
US9132895B2 (en) | 2013-05-08 | 2015-09-15 | SFT Industrie Corp. | Resilient mount for interchangeable foil |
US10597118B2 (en) | 2016-09-12 | 2020-03-24 | Kai Concepts, LLC | Watercraft device with hydrofoil and electric propeller system |
US11897583B2 (en) | 2020-04-22 | 2024-02-13 | Kai Concepts, LLC | Watercraft device with hydrofoil and electric propulsion system |
US12246811B2 (en) | 2020-04-22 | 2025-03-11 | Kai Concepts, LLC | Watercraft device with a handheld controller |
US10946939B1 (en) | 2020-04-22 | 2021-03-16 | Kai Concepts, LLC | Watercraft having a waterproof container and a waterproof electrical connector |
US11485457B1 (en) | 2021-06-14 | 2022-11-01 | Kai Concepts, LLC | Hydrojet propulsion system |
US11878775B2 (en) | 2021-07-13 | 2024-01-23 | Kai Concepts, LLC | Leash system and methods of use |
CN116280065B (en) * | 2023-03-27 | 2024-05-17 | 广东海洋大学 | A roll reduction device suitable for low-speed ships |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2476587A1 (en) * | 1980-02-22 | 1981-08-28 | Diziere Bernard | NEW DEVICE FOR FASTENING AN AILERON OR A DRIFT ON A SAILBOARD |
DE3148907A1 (en) * | 1981-12-10 | 1983-06-23 | Shark Wassersportgeräte GmbH, 2830 Bassum | Centreboard for surfboard |
EP0245571A1 (en) * | 1986-05-14 | 1987-11-19 | Eric Serve | Centerboard or analogous working in a fluid |
DE9012479U1 (en) * | 1990-09-04 | 1990-11-15 | Bonhage, Lutz, 3167 Burgdorf | Device for attaching a fin to a surfboard |
US5328397A (en) * | 1992-03-09 | 1994-07-12 | Fin Control Systems Pty. Limited | Surf fin fixing system |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4325154A (en) * | 1980-03-31 | 1982-04-20 | Collum Jr William E | Surfboard fin |
US4493665A (en) * | 1982-06-07 | 1985-01-15 | Liddle Edward M | Hydrofoil |
US4733496A (en) * | 1986-02-18 | 1988-03-29 | Peter Wallner | Pivoting surfboard fin |
US5032096A (en) * | 1989-08-10 | 1991-07-16 | Scott David A | Laminar device and method for making same |
US5464359A (en) * | 1992-03-09 | 1995-11-07 | Fin Control Systems Pty. Limited | Surf fin fixing system |
US5567190A (en) * | 1995-05-22 | 1996-10-22 | Oates; Kenneth W. | Variable angle of attack finbox assembly for surfboards and the like |
US5813890A (en) * | 1996-09-12 | 1998-09-29 | Benham; Roger A. | Pivoting fin with elastic bias |
US5795205A (en) * | 1996-11-20 | 1998-08-18 | Gantenbein; Rob A. | Attachment for surfboard leash |
JP2001520961A (en) * | 1997-10-27 | 2001-11-06 | パット−テック ピーティーワイ リミテッド | Fin assembly |
US6386933B1 (en) * | 1999-09-30 | 2002-05-14 | Stephen S. Rewald | Enhanced customizable surfboards with adjustable fins and methods for making the same |
US6764364B1 (en) * | 2002-10-21 | 2004-07-20 | Scott Noble Hickman | Surf craft snap-in fin system |
US7182661B2 (en) * | 2005-02-24 | 2007-02-27 | David Bryan Sams | Detachable surfboard fin system |
-
2005
- 2005-05-18 FR FR0504957A patent/FR2885875B1/en not_active Expired - Fee Related
-
2006
- 2006-05-18 ZA ZA200710485A patent/ZA200710485B/en unknown
- 2006-05-18 US US11/914,885 patent/US20080268730A1/en not_active Abandoned
- 2006-05-18 EP EP06764644A patent/EP1893475A1/en not_active Withdrawn
- 2006-05-18 AU AU2006248818A patent/AU2006248818B2/en not_active Ceased
- 2006-05-18 WO PCT/FR2006/001122 patent/WO2006123054A1/en active Application Filing
- 2006-05-18 BR BRPI0609886-0A patent/BRPI0609886A2/en not_active Application Discontinuation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2476587A1 (en) * | 1980-02-22 | 1981-08-28 | Diziere Bernard | NEW DEVICE FOR FASTENING AN AILERON OR A DRIFT ON A SAILBOARD |
DE3148907A1 (en) * | 1981-12-10 | 1983-06-23 | Shark Wassersportgeräte GmbH, 2830 Bassum | Centreboard for surfboard |
EP0245571A1 (en) * | 1986-05-14 | 1987-11-19 | Eric Serve | Centerboard or analogous working in a fluid |
DE9012479U1 (en) * | 1990-09-04 | 1990-11-15 | Bonhage, Lutz, 3167 Burgdorf | Device for attaching a fin to a surfboard |
US5328397A (en) * | 1992-03-09 | 1994-07-12 | Fin Control Systems Pty. Limited | Surf fin fixing system |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9688365B2 (en) | 2012-07-09 | 2017-06-27 | Fin Control Systems Pty Limited | Fin plug for water craft |
US9862467B2 (en) | 2012-07-09 | 2018-01-09 | Fin Control Systems Pty Limited | Securing mechanism for water craft fin |
US10377452B2 (en) | 2012-07-09 | 2019-08-13 | Fin Control Systems Pty Limited | Fin plug for water craft |
US9957021B2 (en) | 2012-11-14 | 2018-05-01 | Fin Control Systems Pty. Limited | Fin plug for a water craft |
Also Published As
Publication number | Publication date |
---|---|
FR2885875A1 (en) | 2006-11-24 |
ZA200710485B (en) | 2009-07-29 |
AU2006248818A1 (en) | 2006-11-23 |
BRPI0609886A2 (en) | 2010-05-04 |
EP1893475A1 (en) | 2008-03-05 |
US20080268730A1 (en) | 2008-10-30 |
AU2006248818B2 (en) | 2012-01-19 |
FR2885875B1 (en) | 2009-04-03 |
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