FR2827570A1 - Thick aerodynamic profile inversion system comprises skin fixed in three points on two rotational axes, rotation of first axis causing rotation of entire system - Google Patents

Thick aerodynamic profile inversion system comprises skin fixed in three points on two rotational axes, rotation of first axis causing rotation of entire system Download PDF

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Publication number
FR2827570A1
FR2827570A1 FR0109785A FR0109785A FR2827570A1 FR 2827570 A1 FR2827570 A1 FR 2827570A1 FR 0109785 A FR0109785 A FR 0109785A FR 0109785 A FR0109785 A FR 0109785A FR 2827570 A1 FR2827570 A1 FR 2827570A1
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France
Prior art keywords
rotation
axis
points
skin
aerodynamic profile
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FR0109785A
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French (fr)
Inventor
Samuel Pierre Cyril Jullien
Kamel Moulai
Vincent Chapin
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Individual
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Individual
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Priority to FR0109785A priority Critical patent/FR2827570A1/en
Publication of FR2827570A1 publication Critical patent/FR2827570A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H9/00—Marine propulsion provided directly by wind power
    • B63H9/04—Marine propulsion provided directly by wind power using sails or like wind-catching surfaces
    • B63H9/06—Types of sail; Constructional features of sails; Arrangements thereof on vessels
    • B63H9/061—Rigid sails; Aerofoil sails

Abstract

The aerodynamic profile inversion system consists of two rotational axes (1,3) which allow varying the length of the skin (2), which is fixed in three points (4,5,6) on the axes. Rotation of the complete system is obtained by rotating only the first axis and the appearance of an extrados and an intrados to obtain the desired profile.

Description

<Desc/Clms Page number 1> <Desc / Clms Page number 1>

La présente invention concerne un dispositif 2827570verser de façon symétrique un profil aérodynamique épais.  The present invention relates to a device 2827570 for symmetrically passing a thick aerodynamic profile.

On le notera A par la suite. It will be noted A thereafter.

Cette fonction est réalisée aujourd'hui au prix de systèmes mécaniques plus ou moins complexes.  This function is performed today at the cost of more or less complex mechanical systems.

Le dispositif selon l'invention permet de remédier à cela, par une extrême simplicité : peu de pièces et mouvement simple.  The device according to the invention makes it possible to remedy this, by extreme simplicity: few parts and simple movement.

Il est constitué de deux axes de rotation : à l'avant, tangent au bord d'attaque et à l'arrière de diamètre calculé de manière à obtenir le bord de fuite par tangence avec la peau qui vient se fixer en trois points (un point de l'axe avant, aligné avec la droite passant par le centre des deux axes-appelé axe s-et deux points de l'axe arrière). La peau est d'une seule pièce, de raideur suffisante pour obtenir le profil désiré. La fixation en trois points est le mécanisme d'entraînement : toutes les pièces sont liées.  It consists of two axes of rotation: at the front, tangent to the leading edge and at the rear with a diameter calculated so as to obtain the trailing edge by tangency with the skin which is fixed at three points (one point of the front axis, aligned with the straight line passing through the center of the two axes (called the s-axis and two points of the rear axis). The skin is in one piece, of sufficient stiffness to obtain the desired profile. The three-point fixing is the driving mechanism: all the parts are linked.

Le profil désiré A est d'abord placé dans sa position profil symétrique : extrados et intrados sont semblables de part et d'autre de l'axe s. Ce profil sera noté S. Par rotation de l'axe avant dans un sens entraînant la rotation de l'axe arrière dans le sens inverse, une partie de la peau située sous l'axe s va donc être entraînée au-dessus de l'axe s La partie de peau située au-dessus de l'axe s va donc augmenter. On assiste à l'apparition d'un intrados au-dessous de l'axe s et

Figure img00010001

d'un extrados au-dessus de l'axe s. En réglant l'angle de cette rotation, on arrive au 1 b profil voulu A. En tournant l'axe avant dans l'autre sens, on obtient le symétrique du profil A. The desired profile A is first placed in its symmetrical profile position: upper and lower surfaces are similar on both sides of the s axis. This profile will be denoted S. By rotation of the front axis in a direction causing the rotation of the rear axis in the opposite direction, part of the skin located under the axis s will therefore be entrained above the s axis The portion of skin located above the s axis will therefore increase. We are witnessing the appearance of a lower surface below the s-axis and
Figure img00010001

of an upper surface above the s axis. By adjusting the angle of this rotation, we arrive at the 1 b desired profile A. By turning the front axis in the other direction, we obtain the symmetrical of profile A.

Les dessins annexés illustrent l'invention : La figure 1 représente une vue de dessus de la position symétrique du profil S.  The accompanying drawings illustrate the invention: FIG. 1 represents a top view of the symmetrical position of the profile S.

La figurea 2 représente une vue de dessus des positions symétriques de part et d'autre de l'axe s du profil A obtenues par rotation de l'axe avant. On obtient le symétrique par rotation dans le sens inverse. FIG. 2 represents a top view of the symmetrical positions on either side of the axis s of the profile A obtained by rotation of the front axis. The symmetric is obtained by rotation in the opposite direction.

En référence à ces dessins, le dispositif comporte un axe cylindrique (1) tangent au bord d'attaque de la peau (2) constituant le profil (A) dans la position désirée ou (S) dans la position de référence. L'axe (1) et la peau (2) sont solidaires au moyen

Figure img00010002

d'une fixation (4). Cette peau est tendue grâce à l'axe arrière (3) venant tangenter ZD la peau en deux points de fixation (5), (6). La peau (2) est fermée en aval de ces points par une fixation (7) permettant d'obtenir le contour fermé formant le profil. With reference to these drawings, the device comprises a cylindrical axis (1) tangent to the leading edge of the skin (2) constituting the profile (A) in the desired position or (S) in the reference position. The axis (1) and the skin (2) are secured by means
Figure img00010002

a fixing (4). This skin is stretched thanks to the rear axis (3) coming to tangent ZD the skin at two fixing points (5), (6). The skin (2) is closed downstream of these points by a fixing (7) making it possible to obtain the closed contour forming the profile.

Le dispositif selon l'invention est particulièrement destiné à la réalisation de voiles de navires de plaisance ou de compétition étant donné le gain de performances d'un profil épais par rapport aux voiles traditionnelles. The device according to the invention is particularly intended for the production of sails for pleasure or competition vessels given the gain in performance of a thick profile compared to traditional sails.

Claims (1)

REVENDICATIONS l) Dispositif pour inverser un profil aérodynamique épais (A) caractérisé par une 'alis' peau (2), par rapport à un axe de symétrie. Cette inversion est réalisée au moyen de deux axes de rotation (1) et (3), permettant la variation de longueur de peau située au-dessus et en-dessous de l'axe de symétrie, faisant apparaître un intrados et un extrados.  l) Device for reversing a thick aerodynamic profile (A) characterized by an 'alis' skin (2), relative to an axis of symmetry. This inversion is carried out by means of two axes of rotation (1) and (3), allowing the variation of length of skin located above and below the axis of symmetry, revealing a lower surface and an upper surface. 2) Dispositif selon la revendication 1 caractérisé en ce que l'axe avant (1) est lié à la peau (2) au point de fixation (4) et l'axe arrière (3) est lié à la peau (2) aux points de fixation (5) et (6). Ainsi les différentes pièces sont liées entre elles : la rotation de l'axe avant seule entraîne l'apparition du profil (A).2) Device according to claim 1 characterized in that the front axis (1) is linked to the skin (2) at the fixing point (4) and the rear axis (3) is linked to the skin (2) to fixing points (5) and (6). Thus the different parts are linked together: the rotation of the front axle alone causes the appearance of the profile (A).
FR0109785A 2001-07-23 2001-07-23 Thick aerodynamic profile inversion system comprises skin fixed in three points on two rotational axes, rotation of first axis causing rotation of entire system Withdrawn FR2827570A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR0109785A FR2827570A1 (en) 2001-07-23 2001-07-23 Thick aerodynamic profile inversion system comprises skin fixed in three points on two rotational axes, rotation of first axis causing rotation of entire system

Applications Claiming Priority (1)

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FR0109785A FR2827570A1 (en) 2001-07-23 2001-07-23 Thick aerodynamic profile inversion system comprises skin fixed in three points on two rotational axes, rotation of first axis causing rotation of entire system

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2892997A1 (en) 2005-11-09 2007-05-11 Fr Sailing Sarl Thick sail with reversible wing profile has integral rotary tubular mast and boom fixed to base of mast with strut
WO2015124803A1 (en) 2014-02-24 2015-08-27 Christophe Dutordoir Sail for ship, machine, vehicle, or craft

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3332383A (en) * 1965-06-24 1967-07-25 Wright Edward Morris Variable camber airfoil
US3802366A (en) * 1971-06-15 1974-04-09 J Mankawich Hydrofoil sailboat
WO1985000573A1 (en) * 1983-07-15 1985-02-14 Wildensteiner Otto M Reversible camber airfoil
LU88528A1 (en) * 1994-09-01 1996-03-18 Laurent Thirkell Hydrodynamic structure with variable profile
US5868092A (en) * 1997-06-24 1999-02-09 Milidragovic; Mladen Wing sail and method of use
FR2789969A1 (en) * 1999-02-18 2000-08-25 Didier Mielcarek Wing for aircraft has leading edge and trailing edge with panels tensioned between them to form airfoil surfaces

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3332383A (en) * 1965-06-24 1967-07-25 Wright Edward Morris Variable camber airfoil
US3802366A (en) * 1971-06-15 1974-04-09 J Mankawich Hydrofoil sailboat
WO1985000573A1 (en) * 1983-07-15 1985-02-14 Wildensteiner Otto M Reversible camber airfoil
LU88528A1 (en) * 1994-09-01 1996-03-18 Laurent Thirkell Hydrodynamic structure with variable profile
US5868092A (en) * 1997-06-24 1999-02-09 Milidragovic; Mladen Wing sail and method of use
FR2789969A1 (en) * 1999-02-18 2000-08-25 Didier Mielcarek Wing for aircraft has leading edge and trailing edge with panels tensioned between them to form airfoil surfaces

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2892997A1 (en) 2005-11-09 2007-05-11 Fr Sailing Sarl Thick sail with reversible wing profile has integral rotary tubular mast and boom fixed to base of mast with strut
EP1785345A1 (en) 2005-11-09 2007-05-16 FR. Sailing S.A.R.L. Wingsail with reversible profile
WO2015124803A1 (en) 2014-02-24 2015-08-27 Christophe Dutordoir Sail for ship, machine, vehicle, or craft

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