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FR2659287A1 - Nautical craft of the trimaran type - Google Patents

Nautical craft of the trimaran type Download PDF

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Publication number
FR2659287A1
FR2659287A1 FR9003287A FR9003287A FR2659287A1 FR 2659287 A1 FR2659287 A1 FR 2659287A1 FR 9003287 A FR9003287 A FR 9003287A FR 9003287 A FR9003287 A FR 9003287A FR 2659287 A1 FR2659287 A1 FR 2659287A1
Authority
FR
France
Prior art keywords
float
hull
water
heel
hydrofoil wing
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Withdrawn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
FR9003287A
Other languages
French (fr)
Inventor
Launay Claude
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
Priority to FR9003287A priority Critical patent/FR2659287A1/en
Publication of FR2659287A1 publication Critical patent/FR2659287A1/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Withdrawn legal-status Critical Current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 
    • 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 
    • B63B1/00—Hydrodynamic or hydrostatic features of hulls or of hydrofoils
    • B63B1/16—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving additional lift from hydrodynamic forces
    • B63B1/24—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving additional lift from hydrodynamic forces of hydrofoil type

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

Abstract

Device for improving the performance of a trimaran. The invention relates to two devices making it possible to keep the tip of the floats out of the water during sailing or when tacking (coming about) and to reduce the deceleration due to the lapping of the water. One of the devices consists of a "foiler" (5) forming an integral part of the hull (4). The inwardly curved shape of the "foiler" (5) makes it possible to obtain, with the lapping of the water, an upward vertical thrust, thus lifting the front of the hull (4) preventing the risks of ploughing into the water. The devices according to the invention are particularly intended to improve the performance of the said sailing boat.

Description

DESCRIPTION DE L'INVENTION
La présente invention concerne des dispositifs destinés à l'amélioration des performances d'un dériveur type Trimaran.DESCRIPTION OF THE INVENTION
The present invention relates to devices intended to improve the performance of a Trimaran type sailing dinghy.

Celui-ci est généralement équipé de flotteurs, ne limitant pas les risques d'enfournement ou de ralentissement lors de la navigation, ou de changement de bord. This is generally equipped with floats, not limiting the risks of charging or slowing down during navigation, or of changing tack.

Les dispositifs selon l'invention permettent de remédier à ces inconvéniants en étant situés sous les flotteurs. The devices according to the invention make it possible to remedy these drawbacks by being located under the floats.

Un premier exemple de réalisation consiste en une "aile d'hydroptère (5) légèrement recourbée vers l'intérieur, permettant d'obtenir une poussée verticale vers le haut grâce aux frottements de l'eau. Ceci relevant le nez des flotteurs (4) et équilibrant l'ensemble du bateau
A titre d'exemple non limitatif, pour un dériveur d'une longueur de 3,70 m hors d'eau, les flotteurs (4) auront des dimensions de l'ordre de 2,55 m de longueur, de 15 cm de largeur et de hauteur. "L'aile d'hydroptère" (5) aura des dimensions de l'ordre de 20 cm de largeur et de 40 cm de longueur développée.A first embodiment consists of a "hydrofoil wing (5) slightly curved inwards, making it possible to obtain a vertical thrust upwards thanks to the friction of the water. This raises the nose of the floats (4) and balancing the whole boat
By way of nonlimiting example, for a dinghy with a length of 3.70 m out of water, the floats (4) will have dimensions of the order of 2.55 m in length, 15 cm in width and height. "The hydrofoil wing" (5) will have dimensions of the order of 20 cm in width and 40 cm in developed length.

Un deuxième exemple de réalisation consiste en une quille de fond (6) de forme particulière. A second example of embodiment consists of a bottom keel (6) of a particular shape.

En effet, un talon en forme de bulbe (talon de quille, talon de dérive) (8) et la forme incurvée de la quille de fond (6) créent une bulle d'air (9) diminuant ainsi la pression de l'élément liquide en cas de changement de bord.  Indeed, a bulbous heel (keel heel, fin) (8) and the curved shape of the bottom keel (6) create an air bubble (9) thus reducing the pressure of the element liquid in the event of a change of board.

De plus, la différence de hauteur entre l'avant et l'arrière de la quille de fond (6) délimite une ligne de tirant d'eau (7) très faible, réduisant l'effort de frottement lors de la navigation. In addition, the difference in height between the front and rear of the bottom keel (6) delimits a very low draft line (7), reducing the friction force during navigation.

La figure 9 de la feuille 4/6 propose une variante possible. Si la figure 8 présente une bulle d'air uniquement à l'intérieur de la quille de fond, la figure 9 présente une bulle d'air sur la totalité du flotteur (4 et 6). Figure 9 of sheet 4/6 proposes a possible variant. If Figure 8 shows an air bubble only inside the bottom keel, Figure 9 shows an air bubble over the entire float (4 and 6).

A titre d'exemple non limitatif, le flotteur, pour ce deuxième dispositif, aura pour une coque centrale d'environ 5,50 m de longueur hors d'eau, des dimensions de l'ordre de 2,70 m de longueur, de 80 cm de hauteur et de 30 cm de largeur. By way of nonlimiting example, the float, for this second device, will have for a central hull of approximately 5.50 m in length out of water, dimensions of the order of 2.70 m in length, 80 cm high and 30 cm wide.

Les dispositifs selon l'invention permettent donc de réduire les frottements de l'eau, et de supprimer les risques d'enfournement lors de la navigation ou de changement de bord, en relevant le nez du bateau. The devices according to the invention therefore make it possible to reduce the friction of the water, and to eliminate the risks of charging during navigation or of changing the edge, by raising the nose of the boat.

Selon un mode particulier de réalisation
- La dite aile d'hydroptère peut, contrairement à une dérive, faire partie intégrante du flotteur.According to a particular embodiment
- The said hydrofoil wing can, unlike a drift, be an integral part of the float.

- La dite "aile d'hydroptère peut avoir une forme légèrement recourbée vers l'intérieur. - The so-called "hydrofoil wing" may have a slightly curved inward shape.

- La quille de fond peut faire partie intégrante du reste du flotteur. - The bottom keel can be an integral part of the rest of the float.

- La forme de la quille de fond peut réduire la ligne de tirant d'eau. - The shape of the bottom keel can reduce the draft line.

- La forme de la quille de fond peut permettre une meilleure pénétration dans l'eau.  - The shape of the bottom keel can allow better penetration into the water.

Les dessins annexés illustrent l'invention
Les feuilles 1/6 et 2/6 représentent le bateau équipé des deux dispositifs selon l'invention, avec vue en élévation (fig. 1), vue arrière (fige 2) et vue en plan (fig. 3).The accompanying drawings illustrate the invention
The sheets 1/6 and 2/6 represent the boat equipped with the two devices according to the invention, with elevation view (fig. 1), rear view (fig. 2) and plan view (fig. 3).

Les feuilles 3/6 et 4/6 représentent les deux dispositifs selon l'invention avec vue en élévation (fig. 4 et 7), en coupe (fig. 5 et 8) avec variante pour le deuxième dispositif (fig. 9) et en perspective (fig. 6 et 10).  The sheets 3/6 and 4/6 represent the two devices according to the invention with an elevation view (fig. 4 and 7), in section (fig. 5 and 8) with a variant for the second device (fig. 9) and in perspective (fig. 6 and 10).

En référence à ces dessins, l'ensemble du bateau (feuilles 1/6 et 2/6) comporte 2 flotteurs (1) reliés à la coque centrale (2) avec un angle à 200 par des bras métalliques (3). With reference to these drawings, the whole boat (sheets 1/6 and 2/6) has 2 floats (1) connected to the central hull (2) at an angle of 200 by metal arms (3).

Le principal de l'invention étant donc le flotteur en lui-meme.  The main thing of the invention is therefore the float itself.

Les dispositifs selon l'invention sont particulièrement destinés à des dériveurs de type Trimaran.  The devices according to the invention are particularly intended for dinghies of the Trimaran type.

Claims (5)

BEVENDICATIONSBEVENDICATIONS 1) Dispositif permettant de maintenir la coque centrale d'un flotteur de dériveur de type Trimaran hors de liteau, caractérisé en ce qu'il comporte une aile d'hydroptère (5) légèrement recourbée vers l'intérieur par rapport à l'axe vertical de la coque du flotteur (4) et qui subit une poussée verticale dûe au frottement de l'élément liquide sur sa face extérieure. 1) Device for holding the central hull of a Trimaran-type sailing dinghy float out of the battens, characterized in that it includes a hydrofoil wing (5) slightly curved inwards relative to the vertical axis of the hull of the float (4) and which undergoes a vertical thrust due to the friction of the liquid element on its external face. 2) Dispositif selon la revendication 1 caractérisé en ce que l'aile d'hydroptère (5) est légèrement recourbée de l'arrière vers l'avant par rapport à l'axe horizontal de la coque du flotteur (4). 2) Device according to claim 1 characterized in that the hydrofoil wing (5) is slightly curved from the rear towards the front relative to the horizontal axis of the hull of the float (4). 3) Dispositif selon la revendication 1 ou la revendication 2 caractérisé en ce que l'aile d'hydroptère (5) fait partie intégrante de la coque du flotteur (4) contrairement à une dérive. 3) Device according to claim 1 or claim 2 characterized in that the hydrofoil wing (5) is an integral part of the hull of the float (4) unlike a drift. 4) Dispositif selon la revendication 1 ou la revendication 3 caractérisé en ce que l'aile d'hydroptère (5) est remplacée par une quille de fond (6) dont le talon en forme de bulbe (talon de quille, talon de dérive) (8) et la forme incurvée de la quille de fond (6) forme une bulle d'air (9) réduisant ainsi les efforts dus au frottement de l'eau.  4) Device according to claim 1 or claim 3 characterized in that the hydrofoil wing (5) is replaced by a bottom keel (6), the bulbous heel (keel heel, drift heel) (8) and the curved shape of the bottom keel (6) forms an air bubble (9) thus reducing the forces due to the friction of the water. 5) Dispositif selon la revendication 4 caractérisé en ce que la différence de hauteur entre l'avant et l'arrière de la quille de fond réduit la ligne de tirant d'eau (7) du flotteur (4).  5) Device according to claim 4 characterized in that the difference in height between the front and the rear of the bottom keel reduces the draft line (7) of the float (4).
FR9003287A 1990-03-09 1990-03-09 Nautical craft of the trimaran type Withdrawn FR2659287A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9003287A FR2659287A1 (en) 1990-03-09 1990-03-09 Nautical craft of the trimaran type

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9003287A FR2659287A1 (en) 1990-03-09 1990-03-09 Nautical craft of the trimaran type

Publications (1)

Publication Number Publication Date
FR2659287A1 true FR2659287A1 (en) 1991-09-13

Family

ID=9394742

Family Applications (1)

Application Number Title Priority Date Filing Date
FR9003287A Withdrawn FR2659287A1 (en) 1990-03-09 1990-03-09 Nautical craft of the trimaran type

Country Status (1)

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FR (1) FR2659287A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2703975A1 (en) * 1993-04-13 1994-10-21 Bergh De Alain Henri Jean Hydrofoil sailing.
WO2000007874A1 (en) * 1998-08-04 2000-02-17 North West Bay Ships Pty. Limited Trimaran construction

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR851374A (en) * 1939-03-09 1940-01-08 Hydrofoil or other self-stabilizing navigation device
FR1586383A (en) * 1968-06-25 1970-02-20
FR2138062A1 (en) * 1971-05-17 1972-12-29 Holtom Gerald
FR2529854A1 (en) * 1982-07-06 1984-01-13 Vermot Jacques Stabilisation and buoyancy device for a boat.
GB2220170A (en) * 1988-06-03 1990-01-04 Robert John Webster High speed sailboat

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR851374A (en) * 1939-03-09 1940-01-08 Hydrofoil or other self-stabilizing navigation device
FR1586383A (en) * 1968-06-25 1970-02-20
FR2138062A1 (en) * 1971-05-17 1972-12-29 Holtom Gerald
FR2529854A1 (en) * 1982-07-06 1984-01-13 Vermot Jacques Stabilisation and buoyancy device for a boat.
GB2220170A (en) * 1988-06-03 1990-01-04 Robert John Webster High speed sailboat

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2703975A1 (en) * 1993-04-13 1994-10-21 Bergh De Alain Henri Jean Hydrofoil sailing.
WO1994023989A2 (en) * 1993-04-13 1994-10-27 Dassault Aviation Wind-propelled hydrofoil
WO1994023989A3 (en) * 1993-04-13 1994-12-08 Dassault Aviat Wind-propelled hydrofoil
US5673641A (en) * 1993-04-13 1997-10-07 Andre Sournat Wind-propelled hydrofoil
WO2000007874A1 (en) * 1998-08-04 2000-02-17 North West Bay Ships Pty. Limited Trimaran construction

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