| abstract |
2. A multiple end-burning rocket comprising a motor casing closed at its forward end and having rearward nozzle means, at least one propellant charge therein case-bonded to said motor casing and having a plurality of end-burning surfaces, and a hollow blast tube extending through said propellant charge and to which said charge is bonded, said tube being expansible and contractible in response to changes in the dimensions of said propellant charge, and said blast tube comprising a cured mixture of a liquid bisphenol epoxide polymer and a liquid polythiopolymercaptan polymer. |