EP0653604B1 - Dispositif de déploiement pour une ailette de stabilisation de projectile de type roquette - Google Patents
Dispositif de déploiement pour une ailette de stabilisation de projectile de type roquette Download PDFInfo
- Publication number
- EP0653604B1 EP0653604B1 EP19940402075 EP94402075A EP0653604B1 EP 0653604 B1 EP0653604 B1 EP 0653604B1 EP 19940402075 EP19940402075 EP 19940402075 EP 94402075 A EP94402075 A EP 94402075A EP 0653604 B1 EP0653604 B1 EP 0653604B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- spring
- fin
- support
- projectile
- axis
- 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.)
- Expired - Lifetime
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
- F42B10/00—Means for influencing, e.g. improving, the aerodynamic properties of projectiles or missiles; Arrangements on projectiles or missiles for stabilising, steering, range-reducing, range-increasing or fall-retarding
- F42B10/02—Stabilising arrangements
- F42B10/14—Stabilising arrangements using fins spread or deployed after launch, e.g. after leaving the barrel
Definitions
- the technical field of the invention is that of devices deployment of projectile fins, in particular of the type rockets.
- the stabilization of such projectiles is generally ensured by a tail unit of diameter corresponding substantially to internal diameter of the launching tube of the projectile considered.
- Patent FR7803397 describes such a projectile in which each fin is deployed by an elastic member.
- This organ is a spring in the form of a curved wire, placed in a groove carried out under each fin. At the exit of the launch tube, the spring relaxes by pushing back the fin and thus ensures its deployment. But this device requires the realization of a groove intended to accommodate the lower part of the fin and the spring and maintain it when deploying the fin.
- Patent EP0202734 proposes to carry out the deployment fins by an elastic member forming an integral part of the fin itself. For this it is planned to carry out a tongue on each fin.
- This device presents the disadvantage of requiring precise machining of the fin and to use for it a material having good elastic qualities, therefore a high cost.
- Patent US4523728 the description of which is taken from the preamble of independent claim 1, describes a projectile whose fins are pivotally mounted around axes parallel to the axis of the projectile. Each fin carries a spring arranged around its pivot axis, spring ensuring first of all the rotation of the fin around its axis, then the translation of the fin towards the rear of the projectile. Such a system is expensive and bulky.
- the object of the invention is therefore to provide a device for deployment of stabilization fins with no such disadvantages.
- the device allows in particular, by a reduced radial dimensions, to ensure opening torque maximum. It also allows to train the least aerodynamic disturbances possible.
- the subject of the invention is a deployment device for a projectile stabilization wing, comprising a torsion spring whose axis is parallel to the axis of the projectile, device characterized in that the spring is placed near the fin and arranged in a groove fitted in a support linked to the projectile and on which is mounted the fin, one end of the spring being integral of the support and the other end of the spring bearing against a lower face of the fin, the spring being torsional stress when the fin is folded and exerting then an effort capable of rotating it relative to the support in order to deploy it.
- the groove has a width greater than the outer diameter of the spring, allowing it to be ejected after deployment of the fin.
- the spring has at one of its ends, a part angled 90 ° and with an axis parallel to the axis of the spring and is radially integral with the support by penetration of the part angled in an orifice made in the rear face of the support, orifice of axis parallel to the axis of the projectile and having a diameter greater than the diameter of the wire constituting the spring, authorizing the ejection of it after deployment of the fin.
- the rear face of the support has a clearance connecting the groove at the orifice and allowing the passage of the end of the spring, clearance with depth and width greater than the diameter of the constituent wire of the spring, allowing ejecting it after deployment of the fin.
- the other end of the spring is near a flange of the support which ensures the axial maintenance of the spring when the fin is in the folded position.
- FIG. 1 schematically represents a projectile 1, of rocket type, placed in a launch tube 2.
- the projectile conventionally consists of a body 3 provided with a warhead 4 in the front.
- ailerons 16 regularly distributed angularly (here in number of 6).
- the rear of the projectile includes a fin support 5 consisting of a cylindrical seat 19 and a collar annular 17.
- the cylindrical bearing surface 19 of the fin support is fitted inside a bore 20, made in part rear of the body 3, and the collar 17 is in abutment against the back of the body. This ensures solidarity, for example by gluing, of the fin support 5 on the body 3.
- the fin support 5 comprises, at the level of its flange annular 17, a tail unit 6 of diameter substantially equal to the internal diameter of the projectile launching tube.
- the empennage 6 is composed of stabilization fins 7 (here 6 in number).
- the collar 17 comprises at its external diameter, yokes 18 which receive the fins 7 pivotally mounted about an axis 8.
- the fins 7 are deployed at the outlet of the launch tube under the action of a deployment device which will be described later.
- the yokes 18 and the fins 16 ensure the guidance of the projectile during its propulsion inside the launch tube.
- FIG. 2 represents the fin support 5 equipped with its tail unit 6, in the position it occupies when it is placed in the launch tube, i.e. stabilization fins folded down along the body of the projectile.
- the empennage 6 comprises six fins 7 regularly angularly spaced.
- a cylindrical torsion spring 9 with angular action is placed near each fin and serves as an elastic member allowing the deployment thereof. It is disposed inside a groove 10, arranged in the flange 17 of the support fins 5, parallel to the axis XX 'of the projectile.
- the groove 10, which is intended to guide the cylindrical spring 9 has a width greater than the outside diameter of the spring, in order to allow the ejection of the latter.
- FIG. 3 represents the fin support 5 alone in the direction F of the figure 2.
- the rear face 13 of the fin support 5 has, at each groove 10, an orifice 14 of axis parallel to the axis XX 'of the projectile and a clearance 15 connecting the hole in the groove
- the end 12 of the spring comprises a part 21 bent at 90 °, with a parallel axis to the axis YY 'of the spring (see Figure 5).
- the bent part 21 penetrates inside the orifice 14 which has a diameter slightly greater than the diameter of the wire composing the spring.
- the spring is thus guided by the groove 10 and radially integral with the support fins by the clearance 15 and the orifice 14.
- the cylindrical spring with angular action is constrained in torsion. It exerts a force on the fin, which ensures, right out of the projectile out of the launch tube, initiation of deployment of each fin corresponding.
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Toys (AREA)
Description
- la figure 1 représente schématiquement un projectile de type roquette muni d'un empennage.
- la figure 2 représente un support d'ailettes équipé de son empennage selon l'invention.
- la figure 3 représente le support d'ailettes seul suivant la direction F de la figure 2.
- la figure 4 représente une vue partielle de l'arrière du projectile après initiation du déploiement d'une ailette.
- la figure 5 représente une vue partielle de l'arrière du projectile lors de l'éjection d'un ressort de torsion.
Claims (6)
- Dispositif de déploiement pour une ailette de stabilisation (7) d'un projectile (1), comprenant un ressort de torsion (9) dont l'axe (YY') est parallèle à l'axe (XX') du projectile, dispositif caractérisé en ce que le ressort est placé à proximité de l'ailette et disposé dans une rainure (10) aménagée dans un support (5) lié au projectile et sur lequel est montée l'ailette (7), une des extrémités (12) du ressort étant solidaire du support et l'autre extrémité (11) du ressort étant en appui contre une face inférieure de l'ailette (7), le ressort (9) se trouvant contraint en torsion lorsque l'ailette est repliée et exerçant alors un effort apte à faire pivoter celle-ci par rapport au support de façon à la déployer.
- Dispositif selon la revendication 1, caractérisé en ce que la rainure (10) a une largeur supérieure au diamètre externe du ressort (9), autorisant ainsi son éjection après déploiement de l'ailette (7).
- Dispositif selon une quelconque des revendications 1 ou 2, caractérisé en ce que le ressort (9) présente à l'une de ses extrémités une partie (21) coudée à 90° et d'axe parallèle à l'axe (YY') du ressort.
- Dispositif selon la revendication 3, caractérisé en ce que le ressort (9) est rendu solidaire radialement du support (5) par la pénétration de la partie coudée (21) dans un orifice (14) réalisé dans la face arrière (13) du support, orifice d'axe parallèle à l'axe (XX') du projectile et présentant un diamètre supérieur au diamètre du fil constitutif du ressort, autorisant l'éjection de celui-ci après déploiement de l'ailette.
- Dispositif selon la revendication 4, caractérisé en ce que la face arrière (13) du support comporte un dégagement (15) reliant la rainure (10) à l'orifice (14) et permettant le passage de l'extrémité (12) du ressort, dégagement présentant une profondeur et une largeur supérieure au diamètre du fil constitutif du ressort, autorisant l'éjection de celui-ci après déploiement de l'ailette.
- Dispositif selon l'une quelconque des revendications 1 à 5, caractérisé en ce que l'extrémité (11) du ressort se trouve à proximité d'une collerette (17) du support (5) qui assure le maintien axial du ressort (9) lorsque l'ailette (7) se trouve en position repliée.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9313617 | 1993-11-16 | ||
FR9313617A FR2712679B1 (fr) | 1993-11-16 | 1993-11-16 | Dispositif de déploiement pour une ailette de stabilisation de projectile de type roquette. |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0653604A1 EP0653604A1 (fr) | 1995-05-17 |
EP0653604B1 true EP0653604B1 (fr) | 1998-07-29 |
Family
ID=9452873
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19940402075 Expired - Lifetime EP0653604B1 (fr) | 1993-11-16 | 1994-09-19 | Dispositif de déploiement pour une ailette de stabilisation de projectile de type roquette |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0653604B1 (fr) |
DE (1) | DE69412036T2 (fr) |
FR (1) | FR2712679B1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SG101481A1 (en) * | 2001-09-18 | 2004-01-30 | Singapore Tech Dynamics Pte | A foldable wing structure for airborne vehicle or the like |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102015004702A1 (de) | 2014-12-11 | 2016-06-16 | Mbda Deutschland Gmbh | Rudersystem |
EP3032212B1 (fr) * | 2014-12-11 | 2017-07-26 | MBDA Deutschland GmbH | Systeme de gouvernail |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2342783C2 (de) * | 1973-08-24 | 1983-12-22 | Rheinmetall GmbH, 4000 Düsseldorf | Mit einem Leitwerk versehenes Geschoß |
SE429266B (sv) * | 1977-02-09 | 1983-08-22 | Bofors Ab | Stjertparti avsett for en i ett eldror utskjutbar fenstabiliserad granat |
US4523728A (en) * | 1983-03-07 | 1985-06-18 | Ford Aerospace & Communications Corporation | Passive auto-erecting alignment wings for long rod penetrator |
EP0202734B1 (fr) * | 1985-03-23 | 1989-06-28 | British Aerospace Public Limited Company | Dispositif pour le déploiement des ailettes |
-
1993
- 1993-11-16 FR FR9313617A patent/FR2712679B1/fr not_active Expired - Fee Related
-
1994
- 1994-09-19 DE DE1994612036 patent/DE69412036T2/de not_active Expired - Fee Related
- 1994-09-19 EP EP19940402075 patent/EP0653604B1/fr not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SG101481A1 (en) * | 2001-09-18 | 2004-01-30 | Singapore Tech Dynamics Pte | A foldable wing structure for airborne vehicle or the like |
Also Published As
Publication number | Publication date |
---|---|
EP0653604A1 (fr) | 1995-05-17 |
FR2712679B1 (fr) | 1996-02-09 |
DE69412036T2 (de) | 1998-12-03 |
DE69412036D1 (de) | 1998-09-03 |
FR2712679A1 (fr) | 1995-05-24 |
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