Patent ID: 8397486
Filing Date: 2013-03-19
Classification: F02K

Abstract:
1. A two-pulse rocket motor having a motor case, comprising: a second propellant; a second igniter set on an end surface of the second propellant; a barrier membrane that covers an initial burning surface of the second propellant entirely and the second igniter; and a first propellant loaded so as to cover the barrier membrane entirely, wherein the first propellant and the second propellant each has an internal burning type or an internal and end burning type of propellant grain design, the barrier membrane is composed of an inner barrier membrane covering an inner surface of the second of the second propellant and an aft barrier membrane covering an aft end surface of the second propellant; and a meeting edge of the aft barrier membrane and the inner barrier membrane is bonded throughout an entire periphery by using a fire-resistant adhesive in order to form a weak part, wherein the aft barrier membrane and the inner barrier membrane separate at the weak part upon combustion of the second propellant.