| 摘要 |
PURPOSE:To shorten the total length of a solid rocked motor having a plug insertion system nozzle and reduce the weight of same by receiving an igniter for firing solid propusive chemicals in a plug supported by a rear retatiner. CONSTITUTION:A chamber 31 in a rocket motor is provided on the rear end with a nozzle 32. A front end plate 33 is fixedly screwed into an end of the chamber 31 to close the front end opening of the chamber 31. Between a retainer claw 34 and rear retainer 35 is sandwiched propulsive chemical grains 39 charged in the chamber 21 and having abore 38. Said grain 39 consists of inner and outer surface combustion type solid propulsive chemicals 40 and restricters 41, 42. A plug body 46 is loosely fitted in the nozzle 32 to form a nozzle throat 50 between said body 46 and the inner surface of the nozzle 32. In a cavity 51 of a plug 52 is received a igniter 55 consisting charge gunpowder 53 and a squib 54 embedded in the charge gunpowder 53. |
