FR2618403A1 - Improvement to underwater hulls of sailboards - Google Patents

Improvement to underwater hulls of sailboards Download PDF

Info

Publication number
FR2618403A1
FR2618403A1 FR8710649A FR8710649A FR2618403A1 FR 2618403 A1 FR2618403 A1 FR 2618403A1 FR 8710649 A FR8710649 A FR 8710649A FR 8710649 A FR8710649 A FR 8710649A FR 2618403 A1 FR2618403 A1 FR 2618403A1
Authority
FR
France
Prior art keywords
board
rails
positive
windsurf
windsurfing
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.)
Granted
Application number
FR8710649A
Other languages
French (fr)
Other versions
FR2618403B1 (en
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.)
ROMERO PIERRE
Original Assignee
ROMERO PIERRE
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
Application filed by ROMERO PIERRE filed Critical ROMERO PIERRE
Priority to FR8710649A priority Critical patent/FR2618403B1/en
Publication of FR2618403A1 publication Critical patent/FR2618403A1/en
Application granted granted Critical
Publication of FR2618403B1 publication Critical patent/FR2618403B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B63SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63BSHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B32/00Water sports boards; Accessories therefor
    • B63B32/50Boards characterised by their constructional features
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B63SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63BSHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B32/00Water sports boards; Accessories therefor
    • B63B32/40Twintip boards; Wakeboards; Surfboards; Windsurfing boards; Paddle boards, e.g. SUP boards; Accessories specially adapted therefor

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Escalators And Moving Walkways (AREA)

Abstract

Sailboard of the type with clearly distinct rear curves characterised in that at least two of the said curves coexist transversely with a clearly and continuously divergent relative arrangement, one of them, 12, essentially positive, affecting the lower surface portions of the board integral with the rear rails, the said rails 1 for this purpose being suitably curved upwards at the ends, and the other, 13, generating, on the axial portion of the underwater hull surface, at least one skid 11 projecting progressively downwards, preferably from the front 6 of the zone of positive curvature 12 where its lower surface 13 connects tangentially onto the underwater hull bottom as far as the end zone, the said skid 11 having a shape such that its lower surface area 13 is suitably dimensioned and oriented with respect to the zones with positive curvature 12 so as to generate most of the rear dynamic lift of the board under sailing conditions without listing.

Description

PERFECTIONNEMENT DES CARENES DE PLANCHE A VOILE
L'invention concerne principalement les carenes de planche a voile mais son application s'étend naturellement aux diverses carènes destinées a une navigation planante à la surface de l'eau.
IMPROVEMENT OF SAILBOARD HULLS
The invention relates mainly to windsurfing hulls but its application naturally extends to the various hulls intended for planing navigation on the surface of the water.

Pour la rigueur de l'exposé, on adoptera pour la suite la terminologie suivante
Le cintrage longitudinal arriere de la surface inferieure de la planche appelé "lift" dans le jargon de la technique, sera désigné par les termes
'gable arriére"; ce galbe sera dit négatif si sa courbure engendre un point d'inflexion sur es lires longitudinales d 1 surface de parène et positif si la dite cour@ure ne change pas de sens.
For the rigor of the presentation, we will adopt for the following the following terminology
The rear longitudinal bending of the lower surface of the board called "lift" in the jargon of the technique, will be designated by the terms
'gable arriére "; this curve will be said to be negative if its curvature gives rise to an inflection point on the longitudinal reads of a parene surface and positive if the said cour @ ure does not change direction.

La zone periphérique avoisinant le raccordement des surfaces inférieure et. superieure de la planche sera désigné par le terme rail'' suivant les usages de ia technique
Enfin on designera par le terme "cannelure"les sillons con@aves étroits parfois disposes longitudinalement sous les planches et couramment appeles "channels" dans le jargon @e la technique.
The peripheral zone near the connection of the lower and. upper of the board will be designated by the term rail '' according to the uses of the technique
Finally one will designate by the term "groove" the grooves con @ aves narrow sometimes arranged longitudinally under the boards and commonly called "channels" in the jargon @e technique.

L'étude des carenes @es planches à voile conduit à rechercher des formes facilitant l'amorce d'une navigation planante pour accroître la vitesse stapilisant la trajectoire rectiligne tout en gardant une bonne capacité à virer. et permettant enfin une navigation en eau plate par vent modéré tout comme dans le clapot par vent important
@es moyens actuellement utilises pour atteindre ces objectifs ne sont en general pas compatibles et par suite la conception des planches implique un compromis tendant à favoriser l'un des dits objectif s car rapport aux autres.
The study of the windsurfing hulls leads to the search for shapes that facilitate the initiation of planing navigation to increase the speed stabilizing the rectilinear trajectory while retaining a good ability to turn. and finally allowing navigation in flat water in moderate wind as in choppy winds
The means currently used to achieve these objectives are generally not compatible and therefore the design of the boards implies a compromise tending to favor one of the said objectives because compared to the others.

C'est ainsi notamment qu'un arrière à galbe faiblement positif et large facilite l'amorce d'une navigation planante par petit temps mais par contra tape désagréablement dans le clapot par gros temps. pour lequel un arrière étroit est generalement recommandé. Thus, in particular, a slightly positive and wide curved rear facilitates the initiation of a planing navigation in light weather but by contra tapping unpleasantly in the choppy weather. for which a narrow rear is generally recommended.

De meme. la mise en oeuvre de rail en arete vive. favorable à une bonne stabilité de route implique une forme longitudinale nettement courbée vers le haut aux extremites de la dite ar@te notamment sur l'arrière pour faci -liter les virages, mais le galbe positif qui en résulte ne favorise pas l'amorce de la navigation planante qui s'effectue an position relativement ca@rée de la planche.  Likewise. the implementation of sharp edge rail. favorable to good road stability implies a clearly curved longitudinal shape upwards at the ends of the so-called ar @ te in particular on the rear to facilitate cornering, but the resulting positive curve does not favor the initiation of the planing navigation which takes place in a relatively ca @ ry position of the board.

Ces divers inconvénients sont en partie compensés en ménageant sous la
planche une surface comportant une ou plusieurs concavités diposées longi
-tudinalement de manière a canaliser jusqu'à l'arrière de la planche, avec
une surpression convenable, l'air avalé Far l'avant de celle-ci et obtenir
de ce fait un meilleur glissement sur l'eau ainsi qu'un amortissement sen
-sible des effets du clapot.
These various drawbacks are partly offset by conserving under the
plank a surface comprising one or more concavities available along
-tudinally so as to channel to the back of the board, with
a suitable overpressure, the air swallowed Far the front of it and obtain
thus a better gliding on the water as well as a damping sen
- susceptible to choppy effects.

Mais cette disposition réduit l'effica@ité de la surface portante initiale
de la planche sauf à manager au voisinage de ses rails des patins d'une
largeur convenable, ou bien encore en applatissant le profil transversal @ inférieur sur l'arrière de la planche, disposition qui dans les planches
les plus récentes est souvent accompagné d'un double galbe dont l'un, légè
-rement positif, affecte la majeure partie avant du tiers arriere @e la
planche, et l'autre faisant suite longitudinalement au précédent, est sen
-siblement infléc@i vers le bas en un galbe le@erement @é@atif affecteut
de faoon sensi@lement uniforme, sur toute sa largeur, la tartie terminale
de la surface de la carene sur laquelle convergent, en quelque sorte, les
dits galbpg cette disposition cependant tout en ameliorant les performan
-ces génerales de la plancne, ne supprime pas pour autant de façon structu-
-relle les contraintes générales évoquées précédement.
But this arrangement reduces the efficiency of the initial bearing surface
board except to manage in the vicinity of its rails skates of a
suitable width, or even by flattening the lower transverse profile @ on the back of the board, arrangement which in the boards
the most recent is often accompanied by a double curve, one of which is light
- clearly positive, affects most of the front third of the rear third
board, and the other following longitudinally to the previous one, is sen
-significantly inflec @ i down in a curve the @ erement @ é @ atif affecteuteut
sensibly @ uniformly, over its entire width, the terminal tartie
of the surface of the hull on which converge, in a way, the
so-called galbpg this provision however while improving the performan
-these general plank, does not remove in a structured way
- like the general constraints mentioned above.

LE but de 1- invention est de remédier à ces inconvénients au moyen d'une
conformation particuliers de l'arrière des planches comportant des galbes
arrieres nettement distin@ts, la dite conformation étant caracterisée an ce
qu'au mois de des dits galbes coexistent transversalement selon une dis
-position relative nettement et continuement divergente, l'un d'eux, essen
-tiellement positif, affectant les portions de surface inférieure de la
planche solidaires des rails arrleres,les dits rails étant convenablement
courbes vers le haut aux extrémités à cet effet, et l'autre. affectant la
portion axiale ce a surface de carène et y enoe@orant au moins un catin
saillant progressivement vers le bas, de préférence depuis l'avant de la
zone de galbe positif définie ci-dessus, o ia surface inferieure du dit
patin se raccoroe tangentiellement sur le fond de caréne, jusqu'à la zone
terminale, le dit patin ayant une conformation telle que sa surface inféri-
-mure se trouve convenablement dimensionnée et orientée par rapport aux zo
-nes latérales de façon à engendrer l'essentiel de la portanoe dynamique
arrière de la planche dans des conditions de navigation sans gite.
THE purpose of 1- invention is to remedy these drawbacks by means of a
particular conformation of the back of the boards with curves
clearly distinguished backs, said conformation being characterized at this
that in the month of so-called curves coexist transversely according to a dis
- clearly and continuously divergent relative position, one of them, essen
-so positive, affecting the lower surface portions of the
board integral with the rear rails, the said rails being suitably
curves up at the ends for this purpose, and the other. affecting the
axial portion this has hull surface and y enoe @ adorning at least one catin
gradually projecting downward, preferably from the front of the
positive curve area defined above, where the lower surface of said
pad tangentially connects to the bottom of the hull, up to the area
terminal, the said shoe having a conformation such that its lower surface
-mure is suitably sized and oriented with respect to the zo
-needs side so as to generate most of the dynamic portanoe
back of the board in navigation conditions without gite.

L'intérêt d'une telle disposition tient a ce qu'une planche conformée de
la sorte se comporte en absence de gite comme une planche dont l'arrière
est étroit et assorti d'un galbe faiblement positif, ou même négatif éven
-tuellement, alors qu'en présence de gite. la courbure arrière du rail re
-trouve toute son efficacité pour faciliter les virages la zone centrale ayant alors un rôle essentiellement anti-@eranant qui vient s@ajouter avan -tageusement a celui ce l@aileron géneralement utilisé a @et effet, notam -ment dans ie cas- où la cavitation rend ie dit alleron inefficace.
The advantage of such an arrangement is that a shaped board of
the sort behaves in the absence of a gite like a board whose rear
is narrow and has a slightly positive curve, or even negative even
-tually, while in the presence of gite. the rear curvature of the rail re
- finds all its effectiveness to facilitate turns the central zone then having an essentially anti-@ eranant role which comes to be added beforehand -tagely to that this l @ fin generally used has an effect, notably in the case where cavitation makes the said goon ineffective.

Un autre interét de cette disposition consiste en ce que le perfection- nement qui an résulte peut etre apporté par modification aux planche actuellement connues et comportant un galbe arrière positif marqué; a cet effet, on fixera à l'arrière de la dite planche, une structure conformée convenablement pour atre assemblée solidairement sur le fond de carène et an modifier le galbe arrière dans se partie centrale. Another advantage of this arrangement consists in that the improvement which results therefrom can be brought by modification to the boards currently known and comprising a marked positive rear curve; for this purpose, we will fix at the rear of said board, a structure suitably shaped to be assembled together on the bottom of the hull and to modify the rear curve in its central part.

Mais l'application préferentielle de l'invention concerne les planches du type à fond concave, qu'elle qu'en soit la forme,et notamment celle qui comporte au moins deux patins laterau@ 5 allongeant de part et d'autre du maitre baù de la planche et une conformation arrière à galbe positif, en sorte qu'en navigation planante, une telle planche convenablement équipée avec un patin arrière central selon l'invention, présente l'avantage, non seulement @e prendre appui sur la surface re@uite de ses trois patins dont l'allongement parallèlement à l'axe @e la planche et la disposition tripode sont tres avantageux pour la stabilité de route. mais aussi de permettre la disposition, de chaque coté du patin central arrière, d'un échappement oe l'air en suppression cans ia concavité générale de la planche dosé convena- -blement pour étendre le coussin d'air sans discontinuité jusqu'à l'arrière sur toute la surface inférieure non affectée à la portance dynamique. But the preferential application of the invention relates to boards of the concave bottom type, whatever its form, and in particular that which comprises at least two side runners @ 5 extending on either side of the master baù of the board and a rear shaping with a positive curve, so that in planing navigation, such a board suitably equipped with a central rear pad according to the invention has the advantage not only of being supported on the surface re @ uite of its three pads whose elongation parallel to the axis @e the board and the tripod arrangement are very advantageous for road stability. but also to allow the provision, on each side of the rear central skid, of an exhaust oe air in removal cans ia general concavity of the board dosed appropriately-to extend the air cushion without discontinuity up to l rear over the entire lower surface not allocated to dynamic lift.

Selon une réalisation particuliere de la planche dont on trouvera ci-aprés une description détaillée, les différentes surfaces portantes précitées sont avantageusement raccordées aux parties concaves ce ia carène par ces cannelures rectilignes dont les effets anti-dérive naturels viennent encore renforcer la stabilité de route inhérente aux planches selon i' in- vention. According to a particular embodiment of the board, a detailed description of which will be found below, the various aforementioned bearing surfaces are advantageously connected to the concave parts of this hull by these rectilinear grooves whose natural anti-drift effects further reinforce the inherent road stability. to the boards according to the invention.

L'invention sera mieux comprise a la lecture oe la description détaillée oui suit de diverses réalisations particulières données ; titre indicatif et non limitatif en référence aux dessins annexée, sur lesquels les dimensions verticales ont été volontairement accentues pour rendre visibles des details qui d l'enchelle de la représentation seraient difficiles a distinguer
Les figures 1, 2 et 3 correspondent au plan de forme d'une planche parti -culière selon l'invention, comportant une vue de cote ( fig 1 ), une demivue de dessous ( fig 2 ), ainsi qu'une vue schématique situant les quatres sections transversales principales (fig 35.
The invention will be better understood on reading the following detailed description of various particular embodiments given; indicative and not limiting with reference to the accompanying drawings, in which the vertical dimensions have been voluntarily accentuated to make visible details which d the scale of the representation would be difficult to distinguish
Figures 1, 2 and 3 correspond to the shape plane of a part-plank according to the invention, comprising a side view (fig 1), a half view from below (fig 2), as well as a schematic view locating the four main cross sections (fig 35.

La figure 4 représente la vue en perspective d'une réalisation de patin arrière central conçu pour être rapporté sur une planche prèexistante ayant par ailleurs le galbe positif lateral arrière convenable.  FIG. 4 represents the perspective view of an embodiment of the central rear shoe designed to be attached to a pre-existing board having, moreover, the suitable rear lateral positive curve.

La figure 5 represente la vue longitudinale @'une autre réalisation de patin central incorporant oe façon solidaire i aileron arriere. Figure 5 shows the longitudinal view @ 'another embodiment of the central shoe incorporating oe solid i rear spoiler.

La planche particulière illustrée Far les figures 1, 2 et 3 comporte un rail 1 en forme @'arête vive ourviligne, solidaire de ceux patins latéraux correspondant sensiblement au point bas de la courbure verticale du dit rail qui se reléve vers l'avant et notoirement vers l"arrière, Far rapport
a un plan 3 sensiblement parallèle au plan de flottaison, pour réaliser la première des ceux dispositions caractéristiques de l'invention. a savoir galba positif latéral sur l'arriére.
The particular board illustrated Far in FIGS. 1, 2 and 3 comprises a rail 1 in the form of a sharp, curved edge, integral with those lateral skids corresponding substantially to the low point of the vertical curvature of said rail which is raised forward and notoriously backwards, Far report
has a plane 3 substantially parallel to the water plane, to achieve the first of those characteristic arrangements of the invention. namely positive lateral galba on the rear.

Sur les différentes figures la dit plan 3 sert de référence commune pour la bonne compréhension des formas de planche selon l'invention, et notament sur la figure 3 sur la quelle 4 sections transversales sont respectivement placées, a l'avant 4, au maitre bau 5, a l'arrière 7 et dans la zone 6 au niveau @e la quelle s'ampr@e le galbe @etéral positif arriere 12. In the various figures, said plane 3 serves as a common reference for the correct understanding of the board formas according to the invention, and in particular in FIG. 3 in which 4 cross sections are respectively placed, at the front 4, at the master beam. 5, at the rear 7 and in the zone 6 at the level where it takes shape the positive rear curve 12.

La section 4 montre un avant comportant une forme générale en V . la section 5 montre une partie centrale comportant un double concave 8 raccorde aux ceux patins lateraux 2 par une cannelure rectiligne 9 dont le bord interieur 10 nettement dispose au dessus de la surface inférieure du catin 2, participe directement à chacune des deux concavités 8 dont la réu -nion marque oar une arête l'axe de la carène depuis l'étrave jusqu'au sein du patin arriéra central 11 constituant la deuxiéme caractéristique de l'invention et dont la suface inférieure 13 prolonge tangentiellement à l'avant le V atténue sur l'arrière de la double concavité principale 8 et se aeforme progressivement vers liarriere an engendrant un profil inférieur final transversalement horizontal, l'ensemble de la dite surface 13 engen- -drant globalement sur la partie centrale de l'arrière de la planche un galbe négatif dont le décalage par rapport au galbe latéral positif des rails 1@ forme un re@an souligné par une cannelure rectiligne 14. Section 4 shows a front with a general V shape. section 5 shows a central part comprising a double concave 8 connected to those lateral pads 2 by a rectilinear groove 9 whose inner edge 10 clearly has above the lower surface of the catin 2, participates directly in each of the two concavities 8 whose réu -nion mark oar an edge the axis of the hull from the bow to the center of the central rear shoe 11 constituting the second characteristic of the invention and whose lower surface 13 extends tangentially to the front the V attenuates on the rear of the main double concavity 8 and gradually aeforms towards the rear generating a final transverse horizontal lower profile, the whole of the said surface 13 generating generally on the central part of the rear of the board a curve negative whose offset from the positive lateral curve of the rails 1 @ forms a re @ an underlined by a rectilinear groove 14.

La figure 4 correspond à un patin central arrière conçu pour se raccorder notamment par collage sur l'arrière des planches du commerce comportant de; rails arrières à galbe positif afin de conférer aux dites planches les ca -racteritiques et avantages de l'invention. Figure 4 corresponds to a rear central shoe designed to be connected in particular by gluing on the back of the commercial boards comprising of; rear rails with a positive curve in order to give said boards the characteristics and advantages of the invention.

A cet effet, ia forme convenable du dit patin est constituée par une superposition de deux volumes solidaires, J'un 15 rigide et résistant est. To this end, ia suitable form of said pad is constituted by a superposition of two integral volumes, J'a 15 rigid and resistant is.

par exemple, de constitution technologique analogue à celle des planches actuelles et constitue le volume principal du patin arrière central, alors que l'autre, constituant un volume relativement beaucoup plus faible que le precédent, est constitué par une lame mince 16 d'un matériau relativement souple et résistant, du type polymère par exemple, permettant d'ajuster facilement par collage. la face supérieure du patin 15 au dessous de la planche tout en assurant par sa partie avant 18 le raccordement tangentie de la surface @u dit patin sur le @ond de la planche, l'ensemble des deux volumes ainsi definis étant traversas par un passage creux 17 disposé d l'emplacement de l'aileron de derive.for example, of technological constitution similar to that of current boards and constitutes the main volume of the central rear shoe, while the other, constituting a relatively much smaller volume than the previous one, consists of a thin blade 16 of a material relatively flexible and resistant, of the polymer type for example, allowing easy adjustment by gluing. the upper face of the pad 15 below the board while ensuring by its front part 18 the tangent connection of the surface @u said pad on the @ond of the board, all of the two volumes thus defined being traversed by a passage hollow 17 arranged at the location of the fin fin.

La figure 5 illustre une autre forme de patin arrière central conçu selon une technologie analogue 8 elle décrite an reférence a la figure 4, dont elle se différencie en ce que la plaque d'adaptation 16 est solidaire d'une faible partie seulement 19 du patin central arrière 15. dont il constitue l'avant et comporte un moyen d'encastrement 20 dans lequel s'anclanche l'a -vant de la partie principale 15 du dit patin arrière central dont le ver -rouillage avec la planche est assuré par au moins une fixation mécanique 21 disposée à l'arrière, à l'opposé du moyen 20, et constitue, par exemple, par des vis ou encore par un dispositif de verrouillage quart de tour, le dit patin central etant alors de preférence solidaire de l'ailero@ de deri -ve arriere 22.  FIG. 5 illustrates another form of central rear shoe designed using similar technology 8 it is described with reference to FIG. 4, from which it differs in that the adapter plate 16 is integral with only a small part 19 of the shoe rear center 15. of which it constitutes the front and comprises a fitting means 20 in which the front part of the main part 15 of the said central rear shoe is anchored, the locking of which with the board is ensured by at minus a mechanical attachment 21 disposed at the rear, opposite the means 20, and constitutes, for example, by screws or even by a quarter-turn locking device, the said central shoe then preferably being integral with the 'ailero @ de deri -ve arriere 22.

Claims (6)

REVENDICATIONS 1 - planche e voile ou type a galbas arrieres nettement distin@ts, carac -tèrisée en ce qu'au moins deux des dits galbes coexistent transversalement selon une disposition relative nettement et confinement divergente. l'un d'eux 12, essentiellement positif, affectant les portions de surface i/nfé- -rieure de la planche solidaires des rails arrières, les dits rails 1 etant à cet effet convenablement courbés vers le haut aux extrémités , et l'autre 1S engendrant sur la portion axiale de la surface de carène au moins un patin 11 saillant progressivement vers le bas, de préférence depuis l'avant 6 de la zone de galbe positif '12, où sa surface inférieure 13 se raccorde tangentiellement sur le fond de carène, jusqu'à la zone terminale, le dit catin 11 ayant une conformation telle que sa surface inférieure 13 se trou -ve convenablement dimensionnée et orientée par rapport aux zones a galbe positif 12 de façon a engerdrer l'essentiel de la portance dynamique arriè -re @e a clenche dans des conditions de navigation sans gite. 1 - windsurfing board or type with distinctly rounded rear beams, charac terized in that at least two of the said curves coexist transversely according to a clearly relative arrangement and divergent confinement. one of them 12, essentially positive, affecting the surface portions i / nf- -rieure of the board integral with the rear rails, the said rails 1 being for this purpose suitably bent upwards at the ends, and the other 1S generating on the axial portion of the hull surface at least one shoe 11 projecting progressively downward, preferably from the front 6 of the positive curve area '12, where its lower surface 13 is tangentially connected to the bottom of hull, up to the terminal zone, the said catin 11 having a conformation such that its lower surface 13 is found to be suitably dimensioned and oriented relative to the zones with positive curve 12 so as to absorb the essential of the rear dynamic lift. -re @ea clicks in conditions of navigation without lodging. 2 - Planche à voi le selon a revendication '1 . caracterisée an ce que la structure @e patin 11 fait partie intégrante de la dite planche. 2 - Windsurfing board according to claim '1. characterized in that the skate @ structure 11 is an integral part of said board. - - Planche a voile selon sa revendication 1 . caractérisée an ce que la structure ae patin 11 est rapportée sous une pianct,e preexistante. - - Windsurf according to claim 1. characterized in that the skid structure 11 is attached under a preexisting plan. 4 - Planche a voila salon l'une des revendications 1 à 3 comportant une face inférieure de forma generale concave simple ou multiple, caractérisée an ce que la dite forme concave débouche sur la partie terminale de la dite planche de part et d'autre du patin 11. 4 - A board here is one of claims 1 to 3 comprising a lower face of single or multiple concave forma generale, characterized in that said concave form opens onto the terminal part of said board on either side of the shoe 11. 5 - Planche a voila selon la revendication 4 . caractérisée en ce que la dite forme concave est notamment ménagée entre deux patins latéraux ssal- -longeant de part et d'autre de la maitresse section de la dite planche. 5 - Voile board according to claim 4. characterized in that said concave shape is in particular formed between two lateral pads ssal- -longant on either side of the main section of said board. - Planche d voile selon la revendication 5 , caractérisée an ce que les dits patins latéraux 2 sont solidaires des rails 1   - Windsurfing board according to claim 5, characterized in that the said lateral skids 2 are integral with the rails 1 i - Planche à voile selon l'une des revendications S ou @, caractérisée en ce que les divers patins qu'elle comporta sont delimites par des cannelures longitudinales sur au moins un de leurs cote. i - Windsurf according to one of claims S or @, characterized in that the various skates that it included are delimited by longitudinal grooves on at least one of their dimensions. 8 - Planche a voile selon la revendication 7 . caracterisée en ce que l'un des bords d'une partie au moins des dites cannelures est disposé sur un ni -veau supérieur a l'autre an sorte que ces cannelures participent directe- -ment aux formes transversales de la planche et notament @a ses concavités. 8 - Windsurfing according to claim 7. characterized in that one of the edges of at least part of said grooves is arranged on a level greater than the other so that these grooves participate directly in the transverse shapes of the board and in particular @a its concavities. 9 - Planche a voile selon l'une des revendications 7 ou 8. caractérisée en ce que les dites cannelures sont rectilignes. 9 - Windsurf according to one of claims 7 or 8. characterized in that said grooves are rectilinear. 10 - Planche a voile selon l'une des revéndications 1 b 9. caractérisée en ce que les rails 1 sont en forme d'arête vive, au moins sur la partie arri- -ère de la dite planche.  10 - Windsurf board according to one of claims 1b 9. characterized in that the rails 1 are in the form of a sharp edge, at least on the rear part of said board.
FR8710649A 1987-07-24 1987-07-24 IMPROVEMENT OF SAILBOARD HULLS Expired - Fee Related FR2618403B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8710649A FR2618403B1 (en) 1987-07-24 1987-07-24 IMPROVEMENT OF SAILBOARD HULLS

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8710649A FR2618403B1 (en) 1987-07-24 1987-07-24 IMPROVEMENT OF SAILBOARD HULLS

Publications (2)

Publication Number Publication Date
FR2618403A1 true FR2618403A1 (en) 1989-01-27
FR2618403B1 FR2618403B1 (en) 1991-07-26

Family

ID=9353619

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8710649A Expired - Fee Related FR2618403B1 (en) 1987-07-24 1987-07-24 IMPROVEMENT OF SAILBOARD HULLS

Country Status (1)

Country Link
FR (1) FR2618403B1 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2938049A1 (en) * 1979-09-20 1981-04-02 Tilo Salzburg Riedel Sail board with deep-profile hull - brings dagger board and mast foot clear of water when board is sailed on edge

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2938049A1 (en) * 1979-09-20 1981-04-02 Tilo Salzburg Riedel Sail board with deep-profile hull - brings dagger board and mast foot clear of water when board is sailed on edge

Also Published As

Publication number Publication date
FR2618403B1 (en) 1991-07-26

Similar Documents

Publication Publication Date Title
US4320546A (en) Surfboard
CA1265175A (en) Hull shapes for ground effect vessels with lateral keels, adapted for dual mode navigation
EP0743239B1 (en) Inflatable boat
EP0170339B1 (en) Nautical vehicle propelled by means of paddles
FR2516472A1 (en) Part-hollow sail board with stabilisers - has two fins vertically below and above water line and centre-board
FR2514718A1 (en) HULL FOR PLEASURE SAILBOAT TYPE CATAMARAN
FR2618403A1 (en) Improvement to underwater hulls of sailboards
FR2525482A1 (en) Paddle plastic aquaplane or surfboard body - opt. made of polyethylene, expanded polyurethane or reinforced polyester or epoxy! resin
EP0108004B1 (en) Catamaran-type boat
FR2484354A1 (en) Boat with free sail - has V=shaped front hull portion and double V=shaped intermediate section
FR2635497A1 (en) BOAT HULL WITH TRIANGULAR SUPPORT
FR2604412A1 (en) Improved underwater hull of a boat
FR2478570A1 (en) Sailing craft with central hull - has two stern outriggers joined by deck with central mast
FR2861687A1 (en) CARINA PLANANTE FOR BOATS.
FR2671533A1 (en) ICE BREAK.
FR2626239A1 (en) Sailboard which has been improved by creating a layer of air under the surface of the hull
FR2509684A1 (en) DEVICE FOR IMPROVING THE PERFORMANCE OF A BOAT AND BOAT PROVIDED WITH SUCH A DEVICE
FR2502104A1 (en) Speedboat or hydroplane hull - has step along each side at approx. level of water-line, to reduce drag and increase speed
FR2699139A1 (en) Variable-width deck, e.g. for sail-boards - has side strips attached by tongue-and-groove joints with through bolts
EP1002714A1 (en) Hull for a hydroplane watercraft
FR2796614A1 (en) Sailboard with sail has asymmetrical hull with varying hull section and offset fins
FR2814715A1 (en) - Hydrofoil skegs for surf board are positioned near edge under hull and directed towards board outside
FR2644747A1 (en) Accessories intended to increase the speed of ships, and to decrease their pitching
FR2641516A2 (en) IMPROVEMENTS TO CATAMARAN FREE SAILBOARD FLOATS
EP0682546A1 (en) Flipper

Legal Events

Date Code Title Description
ER Errata listed in the french official journal (bopi)

Free format text: 04/89

ST Notification of lapse