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目前,美国已把为军用、民用和商用的低成本、高可靠进入太空方案列为重点项目.预计到2000年,对于低地轨道空间运输系统的有效载荷能力要求,可能会达到2268～2722t.固体火箭在满足这一要求方面具有很大的竞争力. 事实上,美国目前的太空入轨级(近地点和远地点发动机)、五分之四的运载火箭助推级和第五代运载火箭新型号,都使用或准备使用固体火箭发动机. 今后的空间站、星球大战计划及太空探索,都需要大推力运载火箭的支持;正在研制
At present, the United States has made it a priority project for military, civilian and commercial low-cost, highly reliable access to space projects and it is estimated that the payload capacity requirements for LEO space transportation systems may reach 2268-2722t by the year 2000. Solid The rocket has great competitiveness in meeting this requirement. In fact, the current U.S. space-based orbit and apogee engines, four-fifths of launch rocket boosters and the fifth generation of launch vehicle new models, All use or are prepared to use solid rocket motors.For future space stations, Star Wars programs and space exploration, require the support of large thrust rocket; under development