Power plants – Reaction motor – Method of operation
Patent
1991-09-20
1993-06-22
Bertsch, Richard A.
Power plants
Reaction motor
Method of operation
60255, 102380, F02K 900
Patent
active
052207838
ABSTRACT:
A process of forming an igniter in an aft-end assembly for a solid rocket motor, the assembly having an internal cavity and comprising at least one element selected from the group consisting of a nozzle, a blast tube and an exit cone, which process comprises positioning an ignition package comprising pyrotechnic material and an initiator in the assembly cavity and causing a polymer foam to expand and cure in the assembly cavity and around the ignition package, so as to embed and secure the ignition package, form an aft closure, and for the igniter as an integral portion of the assembly. In addition, an aft-end assembly for a solid rocket motor is disclosed, which comprises at least one element selected from the group consisting of a nozzle, a blast tube and an exit cone, the assembly having disposed therein polymer foam surrounding an ignition package comprising pyrotechnic material and an initiator so as to embed and secure the ignition package, provide an aft closure, and form an integral portion of the assembly. The foam is capable of filling an assembly having an internal cavity shaped such that a preformed, form-fitting foam igniter cannot be pushed into the assembly.
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Cherry Charles C.
Wiechering Raymond E.
Bertsch Richard A.
Goldberg Mark
Hercules Incorporated
Kocharov Michael I.
Kuller Mark D.
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