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.

Abstract: A solid propellant rocket motor comprising a motor case, solid propellant and at least one end closure, wherein at least one end closure is connected to the casing by at least one fusible connector which melts at temperatures below those that will cause autoignition of the motor but does not melt during normal propulsion, so that the end closure releases before the antoignition and is retained in place during normal propulsion.