EP0012098A1 - Ship of the catamaran type with a central stem - Google Patents

Ship of the catamaran type with a central stem Download PDF

Info

Publication number
EP0012098A1
EP0012098A1 EP79430021A EP79430021A EP0012098A1 EP 0012098 A1 EP0012098 A1 EP 0012098A1 EP 79430021 A EP79430021 A EP 79430021A EP 79430021 A EP79430021 A EP 79430021A EP 0012098 A1 EP0012098 A1 EP 0012098A1
Authority
EP
European Patent Office
Prior art keywords
bow
waterline
catamaran type
submerged
hulls
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.)
Withdrawn
Application number
EP79430021A
Other languages
German (de)
French (fr)
Inventor
Michel Goulley
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0012098A1 publication Critical patent/EP0012098A1/en
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • 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

Definitions

  • the present invention relates to sailing or mechanically propelled boats of the catamaran type, with a view to creating a bow effectively protecting them against waves coming from the front and allowing a continuous and unhooked deck similar to that of monohull ships of the front end to back.
  • trimaran type hulls are better protected from the front, but their central hull, the largest whatever their shape, also creates great resistance to advancement and the side hulls are only floats intended to ensure stability of the central hull.
  • trimeras (patent n ° 2194602), the part close to the rear of which is of the catamaran type. But its central hull must descend lower than the side hulls and its bow must be rounded. This part whose shape and location are studied so that it is always submerged creates a heavy mass to move in the center of the boat and removes certain advantages of the catamaran.
  • the invention consists of a central bow E (FIGS. 1 and 2) similar to a monohull boat bow which extends backwards to a vertical transverse plane. sal Pl passing through a point A close to where the bow touches the waterline. This part of the bow therefore overhangs the waterline.
  • the bow is divided into two parts: a part Sl which, going aft and widening from the upper deck to the bottom of the hull, forms the hull of the ship and the outer sides of the side hulls ; and another surface S2 which creates, by the fallout towards the sides of the lower part of the bow, going towards the rear, the internal sides of the lateral hulls.
  • the submerged part of the bow which does not descend lower than the side hulls, is refined to a keel with a sharp profile like the leading edge of the bow.
  • This submerged part of the bow is therefore only intended to support the bow and cut the water during shocks due to pitching, while avoiding on its rear eddies harmful to a good flow of the water streams.
  • this keel rises and disappears in a rigid connection L between the side hulls, at a point B located in a transverse vertical plane P2 passing not far from the place where, coming from the front, the boat reaches its greatest width. It does not have to be exactly in this plane, but it must be on its bow and in the bow of the boat. After this point and going backwards, there may continue to remain a slight recess D, V-shaped oriented downwards or upwards, but only to ensure rigidity.
  • the boat looks like a catamaran whose two hulls are joined by a homogeneous and continuous link, a single stern joining the two hulls above the link L.
  • a rudder G intended to facilitate certain maneuvers. Particularly on powered vessels mechanical gear and in reverse, this rudder will receive the water streams sent by the propulsive device between the two hulls and will facilitate progress.
  • the horizontal plane in which the link L is located, the top of the vault V3, is at the same level or lower than the rear of the vaults V1 and V2.
  • the shape of the sides C1 1 and C2 (FIG. 4) of the submerged rear part of the bow forming the side of the side vaults closest to the longitudinal axis of the boat, is constructed so that its water lines substantially follow the same curve as the water lines at the front of the inner part of the neighboring lateral hulls C3 and C4 and is substantially parallel to them.
  • the front end of the side hulls is located substantially in the same transverse plane as that where the submerged part of the bow reaches its widest dimension.
  • This larger largaur, corresponding to the master torque of the submerged part of the bow, must not be greater than the width of the master couple of side hulls so that the rear of the bow can disappear before the master couple of side hulls or in the transverse plane corresponding to this master couple.
  • the lateral hulls therefore reach their greatest width in a transverse plane passing through point B or on the rear of it, that is to say when the bow keel disappears in the connection L.
  • the C3 and C4 sides receive a forward movement from the water spurned by the submerged part of the bow. It is therefore necessary that, for the speed most suited to each boat, the pressure exerted on the water molecules to separate them at each point from C3 and C4 is as much as possible to that which exists at the same levels and in the same transverse plane on the outside of the side shells C5 and C6.
  • the lateral hulls are therefore not symmetrical with respect to their mid-longitudinal vertical plane P3 and P4.
  • these lateral shells can be symmetrical with respect to their mid-longitudinal vertical plane.
  • FIG. 5 shows in broken lines T1, from the rear to the front, the surface of the immersed couples of the side shells. Abscise the length of the boat, ordinate the surfaces. In dotted lines T2, the surface of the couples of the submerged part of the bow. The solid line T3 represents the total of the surfaces of the pairs of the submerged parts of the boat. This curve, so that the Archimedes' thrust is regular over the entire length, must increase regularly from the rear to the rear master torque and decrease regularly from the front master torque to the front.
  • the boat described has a waterline located under the horizontal plane passing through the top of the lateral arches. However, the builder can locate the waterline at this plane or slightly above it. In this case the exterior appearance of the boat is exactly the same as that of a classic monohull boat.
  • This type of hull provides, in addition to the above advantages and those mentioned in the description, a very stable possibility of voluntary stranding, the whole boat resting on three places: the undersides of the two side hulls and the lower part from the bow. This makes it possible, in coastal regions subject to the tide, to easily maintain the submerged parts.
  • This invention is of interest to all sea, lake or river boats, sailing or mechanically propelled, which want to keep a great fineness of water lines while having a great roll stability, a big security and a defense of the sea. comparable to that of monohulls.
  • Some boats may wish, for aesthetic reasons, to have an external appearance resembling monohulls. Constructed in this way, they may look exactly alike while enjoying the benefits cited.
  • a particularly interesting application can be made in the field of pleasure yachts and in that of passenger ships.

Abstract

The central stem (E), whose upper part is identical to that of monohulls, has a lower part which, due to the relationships between the width of the principle frames and the forms of the water lines of the submerged rear part of the stem and the lateral hulls, causes the stem (E) to disappear. The keel of the latter, with a tapered profile, rises into a join between the lateral hulls when the lateral hulls have reached their greatest width. Two non-parallel arches (V1, V2) on either side of the stem join together behind the latter in a single arch which continues as far as the rear. The lower rear part of the stem can receive mechanical steering and propulsion elements. <IMAGE>

Description

La présente invention se rapporte aux bateaux à voile ou à propulsion mécanique du type catamaran, en vue de créer une étrave les protégeant efficacement contre les vagues venant de l'avant et permettant un pont continu et sans décrochement semblable à celui des navires monocoques de l'extrémité avant jusqu'à l'arrière.The present invention relates to sailing or mechanically propelled boats of the catamaran type, with a view to creating a bow effectively protecting them against waves coming from the front and allowing a continuous and unhooked deck similar to that of monohull ships of the front end to back.

II existe un type de catamaran (brevet n° 2258300) dont la proue est formée d'une coque monocoque classique. Mais la largeur de cette proue crée une grande résistance à l'avancement contraire au principe des catamarans.There is a type of catamaran (patent n ° 2258300), the bow of which is made of a conventional monohull hull. But the width of this bow creates great resistance to advancement contrary to the principle of catamarans.

Les coques de type trimaran sont mieux protégées de l'avant, mais leur coque centrale, la plus importante quelle que soit leur forme, crée aussi une grande résistance à l'avancement et les coques latérales ne sont que des flotteurs destinés à assurer la stabilité de la coque centrale.The trimaran type hulls are better protected from the front, but their central hull, the largest whatever their shape, also creates great resistance to advancement and the side hulls are only floats intended to ensure stability of the central hull.

On peut citer également un autre type de trimeras (brevet n°2194602) dont Ia partie proche de l'arrière est du type catamaran. Mais sa coque centrale doit descendre plus bas que les coques latérales et son étrave doit être arrondie. Cette partie dont la forme et l'emplacement sont étudiés pour qu'elle soit toujours immergée crée au centre du bateau une lourde masse à déplacer et supprime certains avantages du catamaran.We can also cite another type of trimeras (patent n ° 2194602), the part close to the rear of which is of the catamaran type. But its central hull must descend lower than the side hulls and its bow must be rounded. This part whose shape and location are studied so that it is always submerged creates a heavy mass to move in the center of the boat and removes certain advantages of the catamaran.

II existe aussi un type de catamaran pour le transport de barges (brevet U.S. n°2258303) qui comporte, en plus des étraves des coques latérales, une ou plusieurs autres étraves, mais celles-ci ne protégeant pas davantage l'avant et les superstructures du navire.There is also a type of catamaran for transporting barges (US Patent No. 2258303) which comprises, in addition to the bows of the side hulls, one or more other bows, but these do not further protect the bow and the superstructures of the ship.

Pour pallier tous ces inconvénients la présente invention a pour but de :

  • - Protéger efficacement l'avant des bateaux du type catamaran et leurs superstructures du choc des vagues de l'avant et des retombées d'eau sur le pont.
  • - Permettre aux bateaux du type catamaran d'avoir une surface pontée continue et sans décrochement, semblable à celle des navires monocoques, de l'extrémité avant jusqu'à l'arrière, afin d'y installer des superstructures identiques à celles des navires monocoques.
  • - Permettre atux bateaux de type catamaran d'avoir une coque d'aspect extérieur exactement semblable aux navires monocoques, sur toute la longueur du bateau, sur tout ou partie de la hauteur au dessus de la flottaison.
  • - Permettre à ce type de bateaux de disposer d'appareils directionnels et propulsifs à l'avant, facilitant certaines manoeuvres.
To overcome all these drawbacks, the present invention aims to:
  • - Effectively protect the bow of catamaran type boats and their superstructures from the impact of waves from the bow and from the fallout of water on the deck.
  • - Allow boats of the catamaran type to have a continuous decked surface without stall, similar to that of monohull vessels, from the front end to the stern, in order to install superstructures identical to those of monohull vessels .
  • - Allow atux catamaran type boats to have an exterior appearance hull exactly similar to monohull vessels, over the entire length of the boat, over all or part of the height above the waterline.
  • - Allow this type of boat to have steering and propulsion devices at the front, facilitating certain maneuvers.

D'autres buts et avantages se remarqueront au fur et à mesure de la description suivante. Les dessins annexés auxquels la description se réfère sont les suivants :

  • Figure 1 : vue du bateau par le travers.
  • Figure 2 : vue de l'avant.
  • Figure 3 : vue de l'arière.
  • Figure 4 : coupe suivant un plan horizontal à la flottaison.
  • Figure 5 : courbe représentant, de l'arrière à l'avant, la surface des couples immergés.
Other objects and advantages will become apparent as the following description proceeds. The accompanying drawings to which the description refers are as follows:
  • Figure 1: side view of the boat.
  • Figure 2: front view.
  • Figure 3: back view.
  • Figure 4: section along a horizontal plane at the waterline.
  • Figure 5: curve representing, from back to front, the surface of the immersed pairs.

II est décrit à titre d'exempte non limitatif un mode de réalisation :
L'invention consiste en une étrave centrale E (figure 1 et 2) semblable à une étrave de bateau monocoque qui s'étend vers l'arrière jusql à un plan vertical transver- sal Pl passant par un point A proche de l'endroit où l'étrave touche la flottaison. Cette partie de l'étrave surplombe donc la flottaison.An embodiment is described by way of non-limiting example:
The invention consists of a central bow E (FIGS. 1 and 2) similar to a monohull boat bow which extends backwards to a vertical transverse plane. sal Pl passing through a point A close to where the bow touches the waterline. This part of the bow therefore overhangs the waterline.

A partir de ce plan l'étrave est divisée en deux parties : une partie Sl qui, en allant vers l'arriére et s'élargissant du pont supérieur au bas de la coque, forme la coque du navire et les côtés extérieurs des coques latérales; et une autre surface S2 qui crée, par la retombée vers les côtés de la partie inférieure de l'étrave, en allant vers l'arrière, les côtés intérieurs des coques latérales.From this plane the bow is divided into two parts: a part Sl which, going aft and widening from the upper deck to the bottom of the hull, forms the hull of the ship and the outer sides of the side hulls ; and another surface S2 which creates, by the fallout towards the sides of the lower part of the bow, going towards the rear, the internal sides of the lateral hulls.

La partie immergée de l'étrave, qui ne descend pas plus bas que les coques latérales, s'affine jusqu' une quille de profil tranchant comme le bord d'attaque de l'étrave. Cette partie immergée de l'étrave est donc uniquement destinée à soutenir l'étrave et à couper l'eau lors des chocs dûs au tangage, tout en évitant sur son arrière des remous nuisibles à un bon écoulement des filets d'eau.The submerged part of the bow, which does not descend lower than the side hulls, is refined to a keel with a sharp profile like the leading edge of the bow. This submerged part of the bow is therefore only intended to support the bow and cut the water during shocks due to pitching, while avoiding on its rear eddies harmful to a good flow of the water streams.

En allant vers l'arrière, cette quille remonte et disparaît dans une liaison rigide L entre les coques latérales, en un point B situé dans un plan vertical transversal P2 passant non loin de l'endroit où, en venant de l'avant, le bateau atteint sa plus grande largeur. II n'est pas nécessaire que ce soit exactement dans ce plan, mais ce doit être sur son avant et dans la partie avant du bateau. Après ce point et en allant vers l'arrière, il peut continuer à subsister un léger décrochement D, en forme de V orienté vers le bas ou vers le haut, mais uniquement pour assurer la rigidité.Going rearward, this keel rises and disappears in a rigid connection L between the side hulls, at a point B located in a transverse vertical plane P2 passing not far from the place where, coming from the front, the boat reaches its greatest width. It does not have to be exactly in this plane, but it must be on its bow and in the bow of the boat. After this point and going backwards, there may continue to remain a slight recess D, V-shaped oriented downwards or upwards, but only to ensure rigidity.

En continuant vers l'arrière, le bateau ressemble à un catamaran dont les deux coques sont réunies par une liaison homogène et continue, une seule poupe réunissant les deux coques au dessus de la liaison L.Continuing aft, the boat looks like a catamaran whose two hulls are joined by a homogeneous and continuous link, a single stern joining the two hulls above the link L.

C'est à la fin de la partie immergée de l'étrave que peut se situer un gouvernai G destiné à faciliter certaines manoeuvres. En particulier sur les navires à propulsion mécanique et en marche arrière, ce gouvernail recevra les filets d'eau envoyés par l'appareil propulsif entre les deux coques et facilitera es évolutions.It is at the end of the submerged part of the bow that there can be located a rudder G intended to facilitate certain maneuvers. Particularly on powered vessels mechanical gear and in reverse, this rudder will receive the water streams sent by the propulsive device between the two hulls and will facilitate progress.

II sera aussi possible d'orstaller un appareil propulsif de faible puissance dans la partie basse de l'étrave. II renforcera l'action de ce gouvernail G. De plus, certains bateaux ont besoin de vitesse lente pendant de longues périodes, par exemple pour pratiquer la pêche avec des lignes trainantes. En utilisant cet appareil propulsif on économisera de l'énergte et on évitera de dégrader les propulseurs principaux en les faisant tourner longtemps à faible régime.It will also be possible to install a low power propelling device in the lower part of the bow. It will reinforce the action of this rudder G. In addition, some boats need slow speed for long periods, for example to practice fishing with dragging lines. By using this propulsion unit, energy will be saved and the main propellants will not be degraded by running them for a long time at low speed.

II existe donc deux voûtes VI et V2 (figure 2) placées symétriquement par rapport à l'étrave, ces deux voûtes n'étantpas parallèles. se réunissant en une seule voûte V3 (figure 3) derrière l'étrave au point B (figure 1). Cet ensemble a sensiblement la forme d'un Y selon les caractéristiques suivantes :

  • Pour une meilleure pénétration dans l'eau, les voûtes latérales V1 et V2 peuvent remonter au fur et à mesure qu'elles se rapprochent de l'avant du navire ( R en pointillés figure 1)
There are therefore two arches VI and V2 (Figure 2) placed symmetrically with respect to the stem, these two arches not being parallel. meeting in a single arch V3 (figure 3) behind the stem at point B (figure 1). This assembly has substantially the shape of a Y according to the following characteristics:
  • For better penetration into the water, the side vaults V1 and V2 can go up as they approach the front of the ship (D dashed figure 1)

Le plan horizontal dans lequel se situe la liaison L, sommet de la voûte V3, est au même niveau ou plus bas que l'arrère des voûtes V1 et V2.The horizontal plane in which the link L is located, the top of the vault V3, is at the same level or lower than the rear of the vaults V1 and V2.

La forme des côtés C1 1 et C2 (figure 4) de la partie arrière immergée de l'étrave formant le côté des voûtes latérales le plus près de axe longitudinal du bateau, est construit de telle sorte que ses lignes d'eau suivent sensiblement la même courbe que les lignes d'eau de l'avant de la partie intérieure des coques latérales voisines C3 et C4 et leur est sensiblement parallèle.The shape of the sides C1 1 and C2 (FIG. 4) of the submerged rear part of the bow forming the side of the side vaults closest to the longitudinal axis of the boat, is constructed so that its water lines substantially follow the same curve as the water lines at the front of the inner part of the neighboring lateral hulls C3 and C4 and is substantially parallel to them.

A la flottaison, l'extrémité avant des coques latérales se situe sensiblement dans le même plan transversal que celui où la partie immergée de l'étrave atteint sa plus graode largeue.At the waterline, the front end of the side hulls is located substantially in the same transverse plane as that where the submerged part of the bow reaches its widest dimension.

Cette plus grande largaur, correspondant au maître couple de la partie immergée de l'étrave, ne doit pas être supérieure à la largeur du maître couple des coques latérales pour que l'arrière de l'étrave puisse disparaître avant le maître couple des coques latérales ou dans le plan transversal correspondant à ce maître couple.This larger largaur, corresponding to the master torque of the submerged part of the bow, must not be greater than the width of the master couple of side hulls so that the rear of the bow can disappear before the master couple of side hulls or in the transverse plane corresponding to this master couple.

Les coques latérales atteignent donc leur plus grande largeur dans un plan transversal passant par le point B ou sur l'arrière de celui-ci, c'est à dire lorsque la quille de l'étrave disparaît dans la liaison L.The lateral hulls therefore reach their greatest width in a transverse plane passing through point B or on the rear of it, that is to say when the bow keel disappears in the connection L.

Les côtés C3 et C4 reçoivent en marche avant un remous provenant de l'eau écartée par la partie immergée de l'étrave. II faut donc que, pour la vitesse la plus adaptée à chaque bateau, la pression exercée sur les molécules d'eau pour les écarter en chaque point de C3 et C4 soit le plus égale possible à celle qui existe aux mêmes niveaux et dans le même plan transversal sur la partie extérieure des coques latérales C5 et C6. Les coques latérales ne sont donc pas symétriques par rapport à leur plan vertical longitudinal milieu P3 et P4.The C3 and C4 sides receive a forward movement from the water spurned by the submerged part of the bow. It is therefore necessary that, for the speed most suited to each boat, the pressure exerted on the water molecules to separate them at each point from C3 and C4 is as much as possible to that which exists at the same levels and in the same transverse plane on the outside of the side shells C5 and C6. The lateral hulls are therefore not symmetrical with respect to their mid-longitudinal vertical plane P3 and P4.

Toutefois, dans un souci de simplification de construction, ces coques latérales peuvent être symétriques par rapport à leur plan vertical longitudinal milieu.However, for the sake of simplification of construction, these lateral shells can be symmetrical with respect to their mid-longitudinal vertical plane.

La surface des couples immergés est calculée de la façon suivante : la figure 5 représente en traits discontinus Tl, de l'arrière à l'avant, la surface des couples immergés des coques latérales. En abcisse la longueur du bateau, en ordonnée les surfaces. En pointillés T2 la surface des couples de la partie immergée de l'étrave. Le trait plein T3 représente le total des surfaces des couples des parties immergées du bateau. Cette courbe, afin que la poussée d'Archimède soit régulière sur toute la longueur, doit croître régulièrement de l'arrière jusqu'au maître couple arrière et décroître régulièrement du maître couple avant jusqu'à l'avant.The surface of the immersed couples is calculated as follows: FIG. 5 shows in broken lines T1, from the rear to the front, the surface of the immersed couples of the side shells. Abscise the length of the boat, ordinate the surfaces. In dotted lines T2, the surface of the couples of the submerged part of the bow. The solid line T3 represents the total of the surfaces of the pairs of the submerged parts of the boat. This curve, so that the Archimedes' thrust is regular over the entire length, must increase regularly from the rear to the rear master torque and decrease regularly from the front master torque to the front.

Le bateau décrit a une flottaison située sous le plan horizontal passant par le sommet des voûtes latérales. Mais le constructeur peut situer la flottaison au niveau de ce plan ou légèrement au dessus. Dans ce cas l'aspect extérieur du bateau est exactement le même que celui d'un bateau monocoque classique.The boat described has a waterline located under the horizontal plane passing through the top of the lateral arches. However, the builder can locate the waterline at this plane or slightly above it. In this case the exterior appearance of the boat is exactly the same as that of a classic monohull boat.

Les avantages que l'on peut retirer de la construction d'un tel type de bateau sont nombreux :

  • D'abord tous ceux des catamarans, qui nécessitent beaucoup moins d'énergie de propulsion et donnent une grande stabilité au roulis. On peut installer des quilles ou des dérives sur chaque coque latérale ou au milieu. On peut installer un appareil propulsif entièrement indépendant dans chaque coque, ce qui donne une grande sécurité. De même on peut installer dans chaque coque des caissons étanches ou des volumes légers, tels que de la mousse de polyuréthane, pour rendre le bateau insubmersible.
The advantages that can be obtained from the construction of such a type of boat are numerous:
  • First of all, those of catamarans, which require much less propulsion energy and give great roll stability. You can install keels or daggerboards on each side hull or in the middle. A fully independent propulsion device can be installed in each hull, which gives great security. Similarly, watertight boxes or light volumes, such as polyurethane foam, can be installed in each hull to make the boat unsinkable.

Ce type de coque apporte, en plus des avantages ci-dessus et de ceux cités dans la description, une possibilité d'échouage volontaire très stable, l'ensemble du bateau reposant sur trois endroits : les dessous des deux coques latérales et la partie inférieure de l'étrave. Ceci permet, dans les régions littorales soumises à la marée, d'assurer facilement l'entretien des parties immergées.This type of hull provides, in addition to the above advantages and those mentioned in the description, a very stable possibility of voluntary stranding, the whole boat resting on three places: the undersides of the two side hulls and the lower part from the bow. This makes it possible, in coastal regions subject to the tide, to easily maintain the submerged parts.

Cette invention intéresse tous les bateaùx de mer, de lac ou de rivière, à voile ou à propulsion mécanique, qui veulent conserver une grande finesse de lignes d'eau tout en ayant une grande stabilité au roulis, une grande sécurité et une défense de l'avant comparable à celle des monocoques. Certains bateaux peuvent souhaiter, pour des raisons d'esthétique, avoir un aspect extérieur ressemblant aux monocoques. Construits de cette manière, ils peuvent paraître exactement semblables tout en profitant des avantages cités.This invention is of interest to all sea, lake or river boats, sailing or mechanically propelled, which want to keep a great fineness of water lines while having a great roll stability, a big security and a defense of the sea. comparable to that of monohulls. Some boats may wish, for aesthetic reasons, to have an external appearance resembling monohulls. Constructed in this way, they may look exactly alike while enjoying the benefits cited.

Une application particulièrement intéressante peut être faite dans le domaine des yachts de plaisance et dans celui des navires à passagers.A particularly interesting application can be made in the field of pleasure yachts and in that of passenger ships.

Claims (7)

1 - Bateau de type catamaran à étrave centrale dont la partie avant supérieure est identique à celle d'un bateau monocoque, dont l'étrave comporte une partie nfé- rieure qui ne descend pas au dessous des coques latérales et qui remonte entre les coques latérales entraînant la disparition de l'étrave, caractérisé par le fait que son profil arrière est effilé et que l'importance de la partie immergée de l'étrave est limitée en longueur au maximum a la moitié de celle du bateau, en largeur au maximum à la largeur des coques latérales, et que la courbe des lignes d'eau arrière de l'étrave est sensiblement parallèle à la courbe des lignes d'eau intérieures de la partie avant des coques latérales.1 - Catamaran type boat with central bow, the upper front part of which is identical to that of a monohull boat, the bow of which has a lower part which does not descend below the side hulls and which rises between the side hulls causing the bow to disappear, characterized in that its rear profile is tapered and that the size of the submerged part of the bow is limited in length at most to half that of the boat, in width at most to the width of the side hulls, and that the curve of the rear water lines of the bow is substantially parallel to the curve of the interior water lines of the front part of the side hulls. 2 - Bateau de type catamaran selon la revendication 1 caractérisé par le fait que la quille de l'étrave dont le profil arrière est effilé disparaît dans un plan vertical situé dans la moitié avant du bateau et passant sur l'avant du maître couple avant des coques latérales.2 - Catamaran type boat according to claim 1 characterized in that the bow keel whose tapered rear profile disappears in a vertical plane located in the front half of the boat and passing over the front of the master couple before side shells. 3 - Bateau de type catamaran selon la revendication 1 caractérisé par le fait que la largeur maximum du maître couple à la flottaison de la partie immergée de l'étrave est soit égale soit inférieure à la largeur du maitre· couple à la flottaison des coques latérates.3 - Catamaran type boat according to claim 1 characterized in that the maximum width of the master couple at the waterline of the submerged part of the bow is either equal to or less than the width of the master · couple at the waterline of the laterate hulls . 4 - Bateau de type catamaran selon la revendication 1 caractérisé par le fait que la forme des lignes d'eau à la flottaison de la partie arrière immergée de l'étrave suit sensiblement la même courbe que les lignes d'eau de la flottaison de la partie intérieure avant des coques latérales voisines et leur est sensiblement parallèle.4 - Catamaran type boat according to claim 1 characterized in that the shape of the water lines at the waterline of the submerged rear part of the bow follows substantially the same curve as the water lines of the waterline of the inner front part of the neighboring side shells and is substantially parallel thereto. 5 - Bateau de type catamaran selon la revendication 1 caractérisé par le fait que, à la flottaison, l'extrémité avant des coques latérales se situe sensiblement dans le même plan transversal que celui où la partie immergée de l'étrave atteint sa plus grande largeur à la flottaison.5 - catamaran type boat according to claim 1 characterized in that, at the waterline, the front end of the side hulls is located substantially in the same transverse plane as that where the submerged part of the bow reaches its greatest width at the waterline. 6 - Bateau de type catamaran selon la revendication caractérisé par le fait qu'un gouvernait peut être instal- ié dans la partie arrière immergée de l'étrave.6 - Catamaran type boat according to claim characterized by the fact that a rudder can be installed in the submerged rear part of the bow. 7 - Bateau de type catamaran selon la revendication 1 possédant un élément moteur dans la partie arrière de l'étrave caractérisé par le fait que cet élément moteur exerce une traction dans l'axe longitudinal dans la pawtie avant du navice.7 - Catamaran type boat according to claim 1 having a motor element in the rear part of the bow characterized in that this motor element exerts a traction in the longitudinal axis in the front pawtie of the navice.
EP79430021A 1978-11-24 1979-11-16 Ship of the catamaran type with a central stem Withdrawn EP0012098A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7833900 1978-11-24
FR7833900A FR2442176A1 (en) 1978-11-24 1978-11-24 CATAMARAN TYPE BOAT WITH CENTRAL BOW

Publications (1)

Publication Number Publication Date
EP0012098A1 true EP0012098A1 (en) 1980-06-11

Family

ID=9215571

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79430021A Withdrawn EP0012098A1 (en) 1978-11-24 1979-11-16 Ship of the catamaran type with a central stem

Country Status (3)

Country Link
EP (1) EP0012098A1 (en)
ES (1) ES486001A1 (en)
FR (1) FR2442176A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3504434A1 (en) * 1985-02-09 1986-08-14 Peter 2000 Hamburg Labentz Surface vessel with jet propulsion
DE4127939A1 (en) * 1991-08-25 1993-03-04 Schottel Werft Hull arrangement for trimaran - has bow of central hull located in front of transverse craft plane, defined by bows of side hulls
WO2000075007A3 (en) * 1999-06-08 2001-05-03 William Francis Pentecost Stable tunnel hull
RU191140U1 (en) * 2019-06-07 2019-07-25 Владимир Владимирович Ларькин CATAMARAN HOUSING WITH STEP AND AIR CHANNEL IN THE BOTTOM
RU192097U1 (en) * 2019-06-18 2019-09-03 Владимир Владимирович Ларькин GLOSSING CATAMARAN
GB2571960A (en) * 2018-03-14 2019-09-18 Safehaven Marine Ltd A hybrid boat hull

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2505286B1 (en) * 1981-05-08 1986-07-18 Souaille Pierre NEW SHELLS DESIGNED TO REDUCE THE ENERGY CONSUMPTION OF FISHING VESSELS AND OFF SHORE SERVITUDE

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1169344A (en) * 1957-03-12 1958-12-26 Triangular device of hulls canceling pitch and roll and consequently drift
FR1414492A (en) * 1963-11-25 1965-10-15 Improvements to boats
FR1432674A (en) * 1965-02-08 1966-03-25 Navili S A R L Boat
US3702598A (en) * 1971-06-07 1972-11-14 Jack J Szptyman Watercraft
FR2194602A1 (en) * 1972-08-01 1974-03-01 Lauenborg Jens
GB1368059A (en) * 1971-08-24 1974-09-25 Orr A H Stabilised boat hull
US3871317A (en) * 1973-07-16 1975-03-18 Jack J Szpytman Watercraft
FR2258300A1 (en) * 1974-01-17 1975-08-18 Colombel Raymond Boat hull with three different cross sections - has double hull at rear extending into single front hull
FR2258303A1 (en) * 1974-01-21 1975-08-18 Stradco Inventions & Res Co
FR2387840A1 (en) * 1977-04-22 1978-11-17 Anvar Boat hull with two parallel lateral stern hulls - has fin keels on each hull, and bridging deck

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1169344A (en) * 1957-03-12 1958-12-26 Triangular device of hulls canceling pitch and roll and consequently drift
FR1414492A (en) * 1963-11-25 1965-10-15 Improvements to boats
FR1432674A (en) * 1965-02-08 1966-03-25 Navili S A R L Boat
US3702598A (en) * 1971-06-07 1972-11-14 Jack J Szptyman Watercraft
GB1368059A (en) * 1971-08-24 1974-09-25 Orr A H Stabilised boat hull
FR2194602A1 (en) * 1972-08-01 1974-03-01 Lauenborg Jens
US3871317A (en) * 1973-07-16 1975-03-18 Jack J Szpytman Watercraft
FR2258300A1 (en) * 1974-01-17 1975-08-18 Colombel Raymond Boat hull with three different cross sections - has double hull at rear extending into single front hull
FR2258303A1 (en) * 1974-01-21 1975-08-18 Stradco Inventions & Res Co
FR2387840A1 (en) * 1977-04-22 1978-11-17 Anvar Boat hull with two parallel lateral stern hulls - has fin keels on each hull, and bridging deck

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3504434A1 (en) * 1985-02-09 1986-08-14 Peter 2000 Hamburg Labentz Surface vessel with jet propulsion
DE4127939A1 (en) * 1991-08-25 1993-03-04 Schottel Werft Hull arrangement for trimaran - has bow of central hull located in front of transverse craft plane, defined by bows of side hulls
WO2000075007A3 (en) * 1999-06-08 2001-05-03 William Francis Pentecost Stable tunnel hull
GB2571960A (en) * 2018-03-14 2019-09-18 Safehaven Marine Ltd A hybrid boat hull
GB2571960B (en) * 2018-03-14 2022-12-28 Safehaven Marine Ltd A hybrid boat hull
RU191140U1 (en) * 2019-06-07 2019-07-25 Владимир Владимирович Ларькин CATAMARAN HOUSING WITH STEP AND AIR CHANNEL IN THE BOTTOM
RU192097U1 (en) * 2019-06-18 2019-09-03 Владимир Владимирович Ларькин GLOSSING CATAMARAN

Also Published As

Publication number Publication date
ES486001A1 (en) 1980-05-16
FR2442176B1 (en) 1981-05-22
FR2442176A1 (en) 1980-06-20

Similar Documents

Publication Publication Date Title
CA2297263C (en) Monohull with rear stabilisers for high speed ship
FR2742410A1 (en) MONOCOQUE NAUTICAL MACHINE
EP0527897B1 (en) Multi-hull sailing vessel
CA1265175A (en) Hull shapes for ground effect vessels with lateral keels, adapted for dual mode navigation
EP3707067B1 (en) Floating structure for the deployment and the recovery of at least one autonomous watercraft by a vessel, corresponding method, corresponding system and corresponding vessel
EP0012098A1 (en) Ship of the catamaran type with a central stem
FR2929235A1 (en) Nautical engine e.g. surfboard, for use during nautical sports or leisure activity, has hull comprising axial groove on part of its axial length for forming hollow unit to ensure directional stability of engine
EP1940678B1 (en) Hull for sailing craft whereof the bottom enables water gliding performances to be enhanced
WO1987000135A1 (en) Trimaran
EP0306388A1 (en) Modular watercraft with rotating floats
EP1910161A1 (en) High-speed multihull boat
CA1264990A (en) Catamarah-type boat
EP3442855A1 (en) Catamaran hull of hybrid structure and craft using such a hull
EP1685020A1 (en) Floating hull
FR2808250A1 (en) MOTOR BOAT WITH PLANTING SHELL
FR2579951A1 (en) Hull forms for surface-effect ship with lateral keels and two modes of sailing
FR2724905A1 (en) Light underwater system for stabilisation of boats
EP1809525B1 (en) Amphibious vehicle which is propelled by wind or another force and which is equipped with wheels and a floatation means
FR2463717A1 (en) Catamaran made from planar panels - has diamond shaped element protruding below central deck between hulls to divide water flow
FR2617795A1 (en) VERSATILE ASSAULT VESSEL
FR3010935A1 (en) AMPHIBIC VEHICLE WITH VARIABLE HULL GEOMETRY
FR2594783A1 (en) Catamaran for fishing or transport
FR2805518A1 (en) Landing craft for use on non-docking shores is of catamaran type with movable platform between hulls and ramps at each end
FR2953186A1 (en) Quadrimaran-type vessel i.e. trimaran, for use on e.g. sea, has hull connected to side floats and separated into front and rear floats, and bridge with detachable fixation units for detachably fixing side floats, front float and rear float
FR2953187A1 (en) FLOTATION DEVICE FOR A MARITIME CRAFT

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): BE DE GB IT NL SE

17P Request for examination filed
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19811205