Consumable ignitor for solid-fuel rocket motor

F - Mech Eng,Light,Heat,Weapons – 02 – K

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244/1.2

F02K 9/95 (2006.01) F42C 19/08 (2006.01)

Patent

CA 2024520

Consumable ignition system for solid-propellant rocket motor, comprising: - one thin, substantially spherical, reinforced envelope; - one combustible charge lining the inner surface of the said envelope; - at least one primer for initiating the ignition system, in the form of a cartridge containing a pyrotechnic charge and operating in conjunction with a flamer; - one device for propagating the priming flame; - several sonic nozzles. This ignition system is remarkable in that: - the envelope is made of a composite material; - the sonic nozzles consist of through openings arranged uniformly in the envelope and the layer of combustible charge lining it, running at least one circumference of the envelope; - the cartridge is housed in one of the through openings. Industrial application, including space, for solid-propellant rocket motors.

PRECIS DE LA DIVULGATION Allumeur consumable pour un moteur-fusée à propergol solide, comprenant : - une enveloppe mince sensiblement sphé- rique et renforcée ; - une charge combustible tapissant la surface interne de cette enveloppe ; - au moins une amorce d'allumage de l'allumeur, sous forme de cartouche contenant une charge pyrotechnique et coopérant avec un inflamma- teur ; - un dispositif de propagation de la flamme d'amorçage ; - une pluralité de tuyères soniques Cet allumeur est caractérisé : - en ce que l'enveloppe est réalisée en un matériau composite ; - en ce que les tuyères soniques sont constituées par des ouvertures traversantes ménagées de façon uniforme dans l'enveloppe ainsi que dans la couche de charge combustible qui tapisse celle-ci, suivant au moins une circonférence de l'enveloppe ; - en ce que la cartouche est logée dans une des ouvertures traversantes Application industrielle notamment au domaine spatial pour des moteurs-fusées à propergol solide.

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