FR2731202A1 - Reduction of parachute sail surface - Google Patents

Reduction of parachute sail surface Download PDF

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Publication number
FR2731202A1
FR2731202A1 FR9502671A FR9502671A FR2731202A1 FR 2731202 A1 FR2731202 A1 FR 2731202A1 FR 9502671 A FR9502671 A FR 9502671A FR 9502671 A FR9502671 A FR 9502671A FR 2731202 A1 FR2731202 A1 FR 2731202A1
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France
Prior art keywords
halyards
pulleys
partitions
reduction
reduction zone
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Granted
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FR9502671A
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French (fr)
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FR2731202B1 (en
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Priority to FR9502671A priority Critical patent/FR2731202B1/en
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Publication of FR2731202B1 publication Critical patent/FR2731202B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B64AIRCRAFT; AVIATION; COSMONAUTICS
    • B64DEQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
    • B64D17/00Parachutes
    • B64D17/02Canopy arrangement or construction
    • B64D17/025Canopy arrangement or construction for gliding chutes

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  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Toys (AREA)

Abstract

The parachute sail double surface wing span is reduced by folding, in flight, one or more cavities onto themselves by a system of halyards (1) and internal pulleys (2). The halyards and pulleys are fastened on the inter-cavity partitions (3) to form a reduction zone and bring closer together these partitions when the halyards are pulled. The halyards are joined in a single cavity partition (4) in order to allow simultaneous pulling and locking by the parachutist. The anchoring point of one partition has an eyelet for fixing the halyard ends which then pass through holes in reduction zone partitions to join on to the pulleys

Description

La présente invention concerne un dispositif de réduction, en vol, de la surface des ailes souples double surface, de type Parapente et Parachute, dans le but d'augsenter leur taux de chute ainsi que leur vitesse
Air.
The present invention relates to a device for reducing, in flight, the surface of flexible double-surface wings, of the paraglider and parachute type, with the aim of increasing their fall rate as well as their speed.
Air.

Cette manoeuvre est babituellenent réalisée par une fermeture bilatérale des extrémités de l'aile, grâce å une traction sur les suspentes extérieures du groupe avant (manoeuvre dite des "oreilles"). Le résultat est effectif sur le taux de chute nais n'induit pas d'accélération car les parties fermées de l'aile génèrent une trainée importante. This maneuver is usually carried out by a bilateral closure of the ends of the wing, thanks to a traction on the external lines of the front group (so-called "ears" maneuver). The result is effective on the fall rate but does not induce acceleration because the closed parts of the wing generate a large drag.

Le dispositif selon l'invention permet de réduire la surface de 11 aile par une réduction, en vol, de son envergure. Cette réduction s'opère par un rapprochenent des cloisons inter-alvéoles (4) d'une ou plusieurs parties de l'aile grace å un ensemble de drisses et de poulies internes au profil. The device according to the invention makes it possible to reduce the area of 11 wing by reducing, in flight, its wingspan. This reduction is effected by bringing the inter-cell partitions (4) closer to one or more parts of the wing thanks to a set of halyards and pulleys internal to the profile.

Sur les deux cloisons (4) délimitant l'alvéole ou l'ensemble d'al véoles concernées par le dispositif (zone de réduction) sont aménagés les systènes d'ancrage (3) des poulies et des drisses.Ces ancrages sont répartis régulièrement sur la corde de la cloison. Leur nombre varie selon la dinension de celle-ci.Les ancrages de l'une de ces cloisons re çoivent un oeillet (6) pour la fixation de l'extrémité des drisses.Ceux de l'autre cloison recoivent des poulies (2).Les drisses (1) sont ancrées à ces oeillets puis traversent les cloisons de la zone de réduction par des orifices (7) pour rejoindre les poulies qui leur correspondent puis traversent l'intrados de l'aile (par des orifices) pour rejoindre un dispositif de blocage (taquet coinceur ou autre) solidaire du harnais du pilote ou des élévateurs (5). Les drisses d'une même zone de réduction sont réunies en patte d'oie sur une seule afin d'obtenir une traction et un blocage sinultané. On the two partitions (4) delimiting the cell or the set of cells concerned by the device (reduction zone) are fitted the anchoring systems (3) of the pulleys and the halyards. These anchors are distributed regularly over the partition cord. Their number varies according to the size of the latter. The anchors of one of these partitions receive an eyelet (6) for fixing the end of the halyards. Those of the other partition receive pulleys (2). The halyards (1) are anchored to these eyelets then pass through the partitions of the reduction zone through orifices (7) to join the pulleys which correspond to them then cross the underside of the wing (through orifices) to join a device blocking device (cam cleat or other) secured to the pilot's harness or risers (5). The halyards of the same reduction zone are joined in crow's feet on a single one in order to obtain a traction and a blocking sinultaneous.

En vol nornal le dispositif n'est pas activé et la ou les drisses de commande sont détendues. Lorsque le pilote désire augmenter le taux de chute et (ou) la vitesse, il effectue une traction sur la (ou les) drisse(s) de conazxle qui provoque un repliage sur elle ne-ne de la zone de réduction. La drisse est alors maintenue en position sur le taquet coinceur.Le repliage des alvéoles sur elles-neses n'engendre qu'une légère a;ientation de la trainée et l'aile, dont la charge alaire augmente, accélère. In normal flight, the device is not activated and the control halyard (s) are relaxed. When the pilot wishes to increase the fall rate and / or the speed, he pulls on the conazxle halyard (s) which causes the reduction zone to fold back onto it. The halyard is then held in position on the cleat cleat. The folding of the cells on them-neses generates only a slight orientation of the drag and the wing, whose wing loading increases, accelerates.

Si la traction nécéssaire s'avère trop isportante, un mouflage peut etre rajouté afin de dénultiplier l'effort. If the necessary traction proves to be too important, a hauling can be added in order to increase the effort.

Si la ou les zones de réduction sont aménagées au centre de la voute de l'aile, les connandes de pilotage (les freins) conservent leur éfficacité. Le pilote se trouvant en situation de pilotage anormal sur une aile moins surfacée: Ce qui n'est pas le cas avec la technique des "oreilles' qui condamne les freins. If the reduction zone (s) are located in the center of the arch of the wing, the steering elements (the brakes) retain their effectiveness. The pilot being in an abnormal piloting situation on a less surfaced wing: This is not the case with the technique of "ears" which condemns the brakes.

Pour revenir en vol nornal, le pilote libère la (ou les) drisses du taquet et les alvéoles pliées se redéploient grace t la pression interne du profil. To return to normal flight, the pilot releases the halyard (s) from the cleat and the folded alveoli are redeployed thanks to the internal pressure of the profile.

Les dessins ci-annexés illustrent l'invention:
La figure i représente, en coupe frontale, l'aile en vol nornal (A) et en vol rapide (B) celle-ci étant punie de deux zones de réduction en position centrale.
The attached drawings illustrate the invention:
FIG. I represents, in frontal section, the wing in nominal flight (A) and in rapid flight (B) the latter being punished with two reduction zones in the central position.

La figure 2 représente, en coupe frontale,un exemple de dispositif concernant deux alvéoles. drisse détendue. FIG. 2 shows, in front section, an example of a device relating to two cells. relaxed halyard.

La figure 3 représente, en coupe frontale, le dispositif précédent drisse tendue. Figure 3 shows, in front section, the previous device halyard taut.

La figure 4 représente, une perspective en éclaté, du dispositif précédent, drisse détendue.  Figure 4 shows an exploded perspective of the previous device, relaxed halyard.

Claims (5)

REVENDICATIONS 1) Dispositif de réduction de surface des ailes souples double surface de type parapente ou parachute, caractérisé par l'obtention d'une dininution de l'envergure par replienent, en vol, d'une ou plusieurs al veoles sur elles-xees à l'aide d'un systène de drisses et de poulies internes au profil. 1) Device for reducing the surface of flexible double-surface wings of the paraglider or parachute type, characterized by obtaining a reduction in the span by replienent, in flight, of one or more alveoli on them using a system of halyards and internal pulleys in the profile. 2) Dispositif selon la revendication i caractérisé en ce que les drisses et poulies sont ancrées sur les cloisons inter-alvéoles délinitant la zone de réduction et réalisant le rapprochenent de ces rênes cloisons lors d'une traction sur les drisses. 2) Device according to claim i characterized in that the halyards and pulleys are anchored on the inter-cell partitions delineating the reduction zone and achieving the approximation of these reins partitions during traction on the halyards. 3) Dispositif selon la revendication i ou 2 caractérisé en ce qu'il colporte plus d'une zone de réduction. 3) Device according to claim i or 2 characterized in that it peddles more than one reduction zone. 4) Dispositif selon l'une quelconque des revendications précédentes caractérisé en ce qu'il conporte un nouflage de démultiplication de l'effort. 4) Device according to any one of the preceding claims, characterized in that it includes a force reduction system. 5) Dispositif selon l'une quelconque des revendications précédentes caractérisé en ce qu'il comporte un dispositif de blocage de la drisse de conande.  5) Device according to any one of the preceding claims, characterized in that it comprises a device for blocking the control halyard.
FR9502671A 1995-03-02 1995-03-02 SURFACE REDUCTION DEVICE FOR FLEXIBLE DOUBLE SURFACE WINGS Expired - Fee Related FR2731202B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9502671A FR2731202B1 (en) 1995-03-02 1995-03-02 SURFACE REDUCTION DEVICE FOR FLEXIBLE DOUBLE SURFACE WINGS

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9502671A FR2731202B1 (en) 1995-03-02 1995-03-02 SURFACE REDUCTION DEVICE FOR FLEXIBLE DOUBLE SURFACE WINGS

Publications (2)

Publication Number Publication Date
FR2731202A1 true FR2731202A1 (en) 1996-09-06
FR2731202B1 FR2731202B1 (en) 1997-06-27

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FR9502671A Expired - Fee Related FR2731202B1 (en) 1995-03-02 1995-03-02 SURFACE REDUCTION DEVICE FOR FLEXIBLE DOUBLE SURFACE WINGS

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FR (1) FR2731202B1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004037639A1 (en) * 2002-10-21 2004-05-06 Arnaud Ballu Power management system for kite sail
WO2017151483A1 (en) 2016-03-04 2017-09-08 Airborne Systems Na Inc. Glide modulator system and method for a ram air parachute
CN108438234A (en) * 2018-05-18 2018-08-24 深圳市百川融创科技有限公司 Double-vane umbrella

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109250123B (en) * 2018-10-19 2021-11-16 航宇救生装备有限公司 Slit type inflatable ram parafoil

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2384127A (en) * 1944-01-17 1945-09-04 Albert R Nailor Parachute
US4065079A (en) * 1975-03-05 1977-12-27 Irvin Great Britain Limited Parachute reefing device
US4540145A (en) * 1984-08-27 1985-09-10 The United States Of America As Represented By The Secretary Of The Navy Reefing system
US4846423A (en) * 1987-11-23 1989-07-11 Pioneer Aerospace Corporation Gliding wing parachute apparatus with staged reefing deployment means

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2384127A (en) * 1944-01-17 1945-09-04 Albert R Nailor Parachute
US4065079A (en) * 1975-03-05 1977-12-27 Irvin Great Britain Limited Parachute reefing device
US4540145A (en) * 1984-08-27 1985-09-10 The United States Of America As Represented By The Secretary Of The Navy Reefing system
US4846423A (en) * 1987-11-23 1989-07-11 Pioneer Aerospace Corporation Gliding wing parachute apparatus with staged reefing deployment means

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004037639A1 (en) * 2002-10-21 2004-05-06 Arnaud Ballu Power management system for kite sail
WO2017151483A1 (en) 2016-03-04 2017-09-08 Airborne Systems Na Inc. Glide modulator system and method for a ram air parachute
EP3423355A4 (en) * 2016-03-04 2019-09-11 Airborne Systems NA Inc. Glide modulator system and method for a ram air parachute
AU2017225669B2 (en) * 2016-03-04 2022-03-31 Airborne Systems Na Inc. Glide modulator system and method for a ram air parachute
CN108438234A (en) * 2018-05-18 2018-08-24 深圳市百川融创科技有限公司 Double-vane umbrella

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Publication number Publication date
FR2731202B1 (en) 1997-06-27

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