FR2769577A1 - Lateral float for sail board - Google Patents

Lateral float for sail board Download PDF

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Publication number
FR2769577A1
FR2769577A1 FR9712875A FR9712875A FR2769577A1 FR 2769577 A1 FR2769577 A1 FR 2769577A1 FR 9712875 A FR9712875 A FR 9712875A FR 9712875 A FR9712875 A FR 9712875A FR 2769577 A1 FR2769577 A1 FR 2769577A1
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France
Prior art keywords
hull
float
boat
wing
water
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Withdrawn
Application number
FR9712875A
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French (fr)
Inventor
Didier Marie Dominique Costes
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to FR9712875A priority Critical patent/FR2769577A1/en
Publication of FR2769577A1 publication Critical patent/FR2769577A1/en
Withdrawn legal-status Critical Current

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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
    • B63B32/50—Boards characterised by their constructional features
    • B63B32/55—Multihull boards, e.g. of catamaran type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B1/00—Hydrodynamic or hydrostatic features of hulls or of hydrofoils
    • B63B1/02—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement
    • B63B1/10—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls
    • B63B1/12—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls the hulls being interconnected rigidly
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B39/00—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude
    • B63B39/06—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude to decrease vessel movements by using foils acting on ambient water
    • B63B39/062—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude to decrease vessel movements by using foils acting on ambient water the foils being mounted on outriggers or the like, e.g. antidrift hydrofoils for sail boats
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B43/00—Improving safety of vessels, e.g. damage control, not otherwise provided for
    • B63B43/02—Improving safety of vessels, e.g. damage control, not otherwise provided for reducing risk of capsizing or sinking
    • B63B43/10—Improving safety of vessels, e.g. damage control, not otherwise provided for reducing risk of capsizing or sinking by improving buoyancy
    • B63B43/14—Improving safety of vessels, e.g. damage control, not otherwise provided for reducing risk of capsizing or sinking by improving buoyancy using outboard floating members
    • 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
    • B63H8/20—Rigging arrangements involving masts, e.g. for windsurfing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H9/00—Marine propulsion provided directly by wind power
    • B63H9/04—Marine propulsion provided directly by wind power using sails or like wind-catching surfaces
    • B63H9/06—Types of sail; Constructional features of sails; Arrangements thereof on vessels
    • B63H9/069—Kite-sails for vessels
    • B63H9/072—Control arrangements, e.g. for launching or recovery
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H9/00—Marine propulsion provided directly by wind power
    • B63H9/04—Marine propulsion provided directly by wind power using sails or like wind-catching surfaces
    • B63H9/08—Connections of sails to masts, spars, or the like
    • B63H9/10—Running rigging, e.g. reefing equipment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B1/00—Hydrodynamic or hydrostatic features of hulls or of hydrofoils
    • B63B1/02—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement
    • B63B1/10—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with multiple hulls
    • B63B2001/102—Proas, or similar twin-hull vessels with one main hull and one smaller hull or floater, interconnected by one or more outrigger beams or the like
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Toys (AREA)

Abstract

Two floats (4) for a sail board (1) are placed on the port and starboard side at the ends of arms (3) to form a trimaran. A single float can be mounted on a pivoting arm. The float comprises an outer side (8) almost vertical relative to the hull and a greatly inclined inner side (7) overhanging the water to encourage possible lateral sliding. A vertical or curved stabilizer (5) is placed under the float.

Description

Flotteur latéral pour bateau à voile ou à cerf-volant
Le but de la présente invention est d'amérer.la i stabilité d'une planche à voile pour naviguer plus ais et aÎsènente rriême engin, otrparter une vcrtle plus yrarldepour aller plus vite, ou encore utiliser un cerf-volant comme voile, ce qui nécessite une attention soutenue du pilote vers le cerf-volant et lui rend plus difficile la conduite de la planche. Les dispositions proposées sont applicables à d'autres bateaux.Lateral float for sailing or kite boat
The object of the present invention is to improve the stability of a windsurfing board to navigate more easily and easily, to otrparter a more stable speed to go faster, or even to use a kite as a sail, which requires sustained attention from the pilot towards the kite and makes it more difficult for him to operate the board. The proposed provisions are applicable to other boats.

Selon la présente invention, sur le côté d'une coque favorisant le décollement des filets d'eau à l'arrière, un bras transversal porte en extrémité un flotteur allongé de section droite approximativement triangulaire avec le flanc opposé à la coque proche de la verticale et le flanc côté coque arrondi convexe et surplombant l'eau. Sous le flotteur est fixée une dérive ou "aile marine" oblique, surplombant l'eau côté coque, notamment une aile incurvée avec la concavité côté coque. Le flotteur et l'aile sont destinés à exercer sur l'eau une force vers le bas et vers le côté au vent, lorsqu'ils sont placés au vent par rapport à la coque. According to the present invention, on the side of a hull favoring the separation of the water streams at the rear, a transverse arm carries at the end an elongated float of approximately triangular cross section with the side opposite to the hull close to the vertical and the rounded side of the hull, convex and overhanging the water. Under the float is fixed an oblique drift or "marine wing", overhanging the water on the hull side, in particular a curved wing with the concavity on the hull side. The float and the wing are intended to exert on the water a force downwards and towards the windward side, when they are placed in the wind relative to the hull.

La forme du flotteur facilite son déjaugeage avec glissement sur l'eau lorsque le courant d'eau tend à l'éloigner de la coque. La forme incurvée de l'aile, inspirée d'autres inventions du même auteur, tend à procure la stabilité d'une émersion partielle ainsi que l'accrochage latéral nécessaire à une navigation à voile. The shape of the float facilitates its planing with sliding on the water when the current of water tends to move it away from the hull. The curved shape of the wing, inspired by other inventions by the same author, tends to provide the stability of a partial emersion as well as the lateral attachment necessary for sailing.

Un ensemble bras, flotteur et aile marine peut être disposé de chaque côté de la coque, formant un trimaran à flotteurs relativement hauts, qui naviguera avec le seul flotteur au vent touchant l'eau. On peut alors utiliser deux bras pour chaque flotteur. On peut également utiliser un seul ensemble, dont le bras peut pivoter autour d'un axe vertical sur la coque, en passant par l'arrière, pour revenir du côté au vent de la coque. Cet ensemble est alors doté d'une symétrie avant-arrière pour fonctionner dans les deux sens. Cette disposition en "semi-prao" peut diminuer le poids et le coût du dispositif. An arm, float and marine wing assembly can be arranged on each side of the hull, forming a trimaran with relatively high floats, which will sail with the only float in the wind touching the water. Two arms can then be used for each float. One can also use a single set, the arm of which can pivot around a vertical axis on the hull, passing through the rear, to return to the windward side of the hull. This assembly is then endowed with a front-rear symmetry to operate in both directions. This "semi-prao" arrangement can reduce the weight and the cost of the device.

La présente invention est illustrée par les Figures suivantes:
- Figure 1. Vue perspective du trimaran tiré par un cerf-volant,
- Figure 2. Coupe transversale de la coque et d'un flotteur du trimaran,
- Figure 3. Vue perspective du semi-prao muni d'une voile.The present invention is illustrated by the following Figures:
- Figure 1. Perspective view of the trimaran pulled by a kite,
- Figure 2. Cross section of the hull and a trimaran float,
- Figure 3. Perspective view of the semi-prao fitted with a sail.

Les Figures 1 et 2 pour le trimaran montrent une coque 1 d'une planche à voile, surmontée d'une embase 2 adaptée à cette coque, ancrée par exemple en utilisant le puits de dérive existant. De l'embase partent deux bras transversaux 3 et 3' formant un dièdre vers le haut, aux extrémités desquels sont fixés deux flotteurs 4 et 4' allongés parallèles à la coque, leurs lignes de quille telles que 5 étant nettement plus hautes que celle de la coque, de telle manière qu'un seul flotteur touche l'eau. C'est le flotteur au vent qui est destiné, sous l'action du pilote, à s'appuyer sur l'eau soit directement soit par l'intermédiaire de son aile 6 (dérive), et à procurer l'essentiel de la résistance latérale à la force du vent. Cette position au vent de la résistance améliore la stabilité en roulis, lorsqu'on utilise un cerf volant ou une voilure à effet sustentateur comme dans une planche à voile classique. Figures 1 and 2 for the trimaran show a hull 1 of a windsurfing board, surmounted by a base 2 adapted to this hull, anchored for example by using the existing drift well. From the base, two transverse arms 3 and 3 'form an upward dihedral, at the ends of which are fixed two floats 4 and 4' elongated parallel to the hull, their keel lines such as 5 being significantly higher than that of the hull, so that only one float touches the water. It is the float in the wind which is intended, under the action of the pilot, to lean on the water either directly or through its wing 6 (drift), and to provide the essential of the resistance lateral to the force of the wind. This windward position of the resistance improves the roll stability, when using a kite or a wing with lift effect as in a traditional windsurfing board.

Ce flotteur au vent assurant la résistance et tendant donc à déraper sur l'eau dans le sens du vent, on lui donne une forme qui favorise alors son soulèvement, ajoutant cet effet sustentateur à celui des parties aériennes et de la coque hydroplanante. A cette fin, son flanc 7 côté coque est fortement incliné au dessus de l'eau, par exemple avec un angle moyen de l'ordre de 45 , avec un bombement qui diminue cet angle en se rapprochant de la quille. Le flanc 8 côté extérieur peut être pratiquement vertical. Lors d'un dérapage, les filets d'eau ont ainsi tendance à décoller du flanc extérieur, avec effet sustentateur et diminution du frottement. This float in the wind ensuring resistance and therefore tending to slip on the water in the direction of the wind, it is given a shape which then favors its lifting, adding this lifting effect to that of the aerial parts and the hydroplaning hull. To this end, its side 7 on the hull side is strongly inclined above the water, for example with an average angle of the order of 45, with a bulge which decreases this angle by approaching the keel. The sidewall 8 on the outer side can be practically vertical. During a skid, the water streams thus tend to take off from the outer flank, with a lifting effect and reduction of friction.

L'aile 6 doit s'accrocher à l'eau sans dérapage, tout en procurant elle aussi une sustentation. On utilise à cette fin la forme incurvée déjà proposée par le même auteur dans d'autres applications la partie la plus profonde peut être pratiquement verticale mais les parties au dessus donnent de plus en plus de sustentation, ce qui conduit à une stabilisation de l'émersion. Le profil d'aile correspond à une portance vers l'extérieur: I'intrados côté coque est donc à peu près plat et l'extrados est bombé. Cette aile peut être relevée, partiellement pour régler son action sur l'eau, ou complètement pour aborder le rivage, notamment en glissant dans un passage incliné 9 perçant le flotteur et en aboutissant sous le bras 3. La commande de ce relevage, non figurée, peut consister en des brins passant sur des poulies. Wing 6 must cling to the water without slipping, while also providing lift. We use for this purpose the curved shape already proposed by the same author in other applications the deepest part can be practically vertical but the parts above give more and more lift, which leads to a stabilization of the emersion. The wing profile corresponds to a lift towards the outside: the underside on the hull side is therefore approximately flat and the upper surface is curved. This wing can be raised, partially to adjust its action on the water, or completely to approach the shore, in particular by sliding in an inclined passage 9 piercing the float and arriving under the arm 3. The control of this lifting, not shown , may consist of strands passing over pulleys.

Pour le trimaran, les deux flotteurs et les deux ailes vont toujours dans le sens avant de la coque et peuvent donc n'être pas symétriques avant-arrière; les formes et profils sont optimisées en conséquence. For the trimaran, the two floats and the two wings always go in the forward direction of the hull and may therefore not be symmetrical front-rear; shapes and profiles are optimized accordingly.

On peut cependant utiliser un seul ensemble bras-flotteur-aile, selon la Figure 3. Cet ensemble peut pivoter sur un axe 20 placé sur l'embase 2 dans le plan de symétrie de la coque, I'ensemble passant par l'arrière dans son parcours d'un côté à l'autre. De chaque côté, une butée telle que 21, placée sur l'embase, limite l'angle de pivotement vers l'avant. However, it is possible to use a single arm-float-wing assembly, according to FIG. 3. This assembly can pivot on an axis 20 placed on the base 2 in the plane of symmetry of the hull, the assembly passing through the rear in its route from side to side. On each side, a stop such as 21, placed on the base, limits the pivot angle forwards.

La rotation est commandée par le pilote qui est assis sur le bras 3 et fait tourner la coque avec ses pieds Bien les fils de cerf-volant ou l'écoute de voile puissent tirer le bras vers l'avant, on dispose des systèmes de blocage de la rotation vers l'arrière, effaçables par le pilote avec un pied, tels que des cliquets 22 fixés sur l'embase. Dans le cas de ce "semiprao", I'ensemble bras-flotteur-aile doit être symétrique avant-arrière. La forme du flotteur, pour favoriser le glissement de l'eau vers l'extérieur, est favorable pour sauvegarder un certain équilibre en roulis lors de la manoeuvre de pivotement.The rotation is controlled by the pilot who sits on the arm 3 and rotates the hull with his feet Although the kite wires or the sheet of the sail can pull the arm forward, there are locking systems backward rotation, erasable by the pilot with a foot, such as pawls 22 fixed on the base. In the case of this "semiprao", the arm-float-wing assembly must be symmetrical front-rear. The shape of the float, to promote the sliding of the water outwards, is favorable to save a certain balance in roll during the pivoting maneuver.

Les plateformes de bateau ainsi obtenues, en trimaran ou en semi-praos, conviennent en particulier pour la traction par un cerf-volant, selon la Figure 1. La stabilité est en effet améliorée par rapport à la planche à voile et le pilote, assis sur le bras 3 au vent et tenant les poignées de commande 11 du cerf-volant, peut concentrer son attention sur celui-ci. Pour accroitre la stabilité, il est bon que les fils du cerf volant exercent très bas leur action sur la coque. On prévoit donc des crochets-guides 12, bas sur la coque, ici disposés sur un palonnier 13 rotatif pour diminuer les frottements Les Figures 1 et 3 montrent également un gouvernail 14 lié à un palonnier 15 à la portée du pied du pilote. The boat platforms thus obtained, in trimaran or semi-praos, are particularly suitable for traction by a kite, according to Figure 1. Stability is indeed improved compared to windsurfing and the pilot, seated on the arm 3 in the wind and holding the control handles 11 of the kite, can focus its attention on it. To increase stability, it is good that the kite's wires exert their action on the hull very low. Therefore, guide hooks 12 are provided, low on the hull, here disposed on a rotary spreader 13 to reduce friction. Figures 1 and 3 also show a rudder 14 linked to a spreader 15 within reach of the pilot's foot.

Dans le cas de la propulsion par une voile (Figure 3), on peut choisir tout gréement et notamment une voile classique de planche à voile, telle que figurée en 20 dans le cas du semi-prao. Le pilote, assis sur le bras 3, ne peut alors contrôler la voile directement avec le wishbone, notamment pour le virement vent-arrière. On a donc prévu un hauban de mat 25 vers l'avant et des haubans latéraux 26 et 26' de mat attachés élastiquement à la coque I pour limiter le débattement latéral, ces haubans pouvant chacun être tiré vers l'extérieur par le pilote au moyen d'un boucle 27 pour incliner la voile vers le vent et obtenir l'effet sustentateur habituel pour ce gréement. Une écoute 28 est également tenue par le pilote. In the case of propulsion by a sail (Figure 3), one can choose any rigging and in particular a classic windsurfing sail, as shown in 20 in the case of semi-prao. The pilot, seated on arm 3, cannot then control the sail directly with the wishbone, in particular for the wind-aft turn. A mast strut 25 is therefore provided forwards and lateral struts 26 and 26 ′ of mast attached elastically to the hull I to limit the lateral movement, these struts each being able to be pulled outwards by the pilot by means of a loop 27 to tilt the sail towards the wind and obtain the usual lifting effect for this rigging. A listening 28 is also held by the pilot.

On note que dans le cas d'un gréement classique n'oscillant pas latéralement, on obtient déjà, par l'inclinaison d'ensemble de la voile vers le vent, un certain effet de sustentation. It is noted that in the case of a conventional rigging which does not oscillate laterally, there is already obtained, by the overall inclination of the sail towards the wind, a certain lifting effect.

Claims (7)

REVENDICATIONS 1. Flotteur allongé (4) fixé sur le côté d'une coque (1) de bateau au moyen d'un ou plusieurs bras transversaux (3), caractérisé en ce que sa section est approximativement triangulaire et en ce que son flanc (8) extérieur ( opposé à la coque) est sensiblement vertical tandis que son flanc (7) côté coque (intérieur) est incliné au dessus de l'eau.  1. elongated float (4) fixed on the side of a hull (1) of a boat by means of one or more transverse arms (3), characterized in that its section is approximately triangular and in that its side (8 ) exterior (opposite the hull) is substantially vertical while its side (7) hull side (interior) is inclined above the water. 2. Flotteur (4) selon la revendication 1, caractérisé en ce qu'il porte une dérive ou aile marine (6) saillante sous la ligne de quille formée par les deux flancs, le profil hydrodynamique de cette dérive comportant un intrados côté intérieur (côté coque) et un extrados côté extérieur. 2. Float (4) according to claim 1, characterized in that it carries a fin or marine wing (6) projecting under the keel line formed by the two sides, the hydrodynamic profile of this fin comprising a lower surface on the inner side ( hull side) and an exterior side upper surface. 3. Flotteur (4) selon la revendication 2, caractérisé en ce que la forme en long de l'aile marine vers le bas est incurvée avec sa concavité côté intérieur. 3. Float (4) according to claim 2, characterized in that the downward shape of the sea wing is curved with its concavity on the inner side. 4. Bateau caractérisé en ce qu'il comporte deux flotteurs selon l'une des revendications précédentes. 4. Boat characterized in that it comprises two floats according to one of the preceding claims. 5. Bateau caractérisé en ce qu'il comporte un seul flotteur selon rune des revendications 1 à 3, le bras dudit flotteur étant fixé sur la coque par un pivot (20) permettant une rotation d'un demi-tour en passant par l'arrière de la coque et procurant donc au flotteur deux positions possibles, à bâbord et à tribord. 5. Boat characterized in that it comprises a single float according to one of claims 1 to 3, the arm of said float being fixed on the hull by a pivot (20) allowing a rotation of a half-turn passing through the aft of the hull and therefore providing the float with two possible positions, to port and starboard. 6 Bateau selon l'une des revendications 4 et 5, caractérisé en ce que la coque porte des moyens de coulissement (12) des fils d'un cerf-volant. 6 Boat according to one of claims 4 and 5, characterized in that the hull carries sliding means (12) of the son of a kite. 7. Bateau selon l'une des revendications 4 et 5, caractérisé en ce qu'il porte une voile.  7. Boat according to one of claims 4 and 5, characterized in that it carries a sail.
FR9712875A 1997-10-15 1997-10-15 Lateral float for sail board Withdrawn FR2769577A1 (en)

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Application Number Priority Date Filing Date Title
FR9712875A FR2769577A1 (en) 1997-10-15 1997-10-15 Lateral float for sail board

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008038327A3 (en) * 2006-09-27 2008-05-15 Dario Oliviero System to stabilize a windsurf, in particular to facilitate the teaching of the windsurf
NL1036890C2 (en) * 2009-04-21 2010-10-22 H M J Dullemans Beheer B V MULTIPLE VESSEL.
WO2011018692A2 (en) * 2009-08-12 2011-02-17 Fontes Joao Antonio Crespo Device enabling reduction of sailboat heel

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008038327A3 (en) * 2006-09-27 2008-05-15 Dario Oliviero System to stabilize a windsurf, in particular to facilitate the teaching of the windsurf
NL1036890C2 (en) * 2009-04-21 2010-10-22 H M J Dullemans Beheer B V MULTIPLE VESSEL.
WO2010123353A1 (en) * 2009-04-21 2010-10-28 H.M.J. Dullemans Beheer B.V. Multihull vessel
WO2011018692A2 (en) * 2009-08-12 2011-02-17 Fontes Joao Antonio Crespo Device enabling reduction of sailboat heel
FR2949106A1 (en) * 2009-08-12 2011-02-18 Joao Antonio Crespo Fontes METHOD AND DEVICE FOR SAILBOAT FOR LESS GITE AND MORE SAILING SURFACE
WO2011018692A3 (en) * 2009-08-12 2011-05-05 Fontes Joao Antonio Crespo Device for reducing sailboat heeling

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