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从1955年到1975年这二十年期间,固体推进剂火箭发动机的技术进展很快,它在战术、战略和宇宙应用各方面取代了液体推进剂火箭。一般来说,选用固体火箭发动机比液体火箭发动机价格便宜,并且反应时间短。看来液体火箭的主要用途不得不退缩到要求多用途、极高性能、多次起动和关机以及节流控制的任务方面。将来,固体火箭发动机在某些任务方面还可能被低价格的空气喷气推进或液体火箭所取代。虽然美国航空与宇舰学会的固体火箭委员会对国际政治、国家的看法和重点以及联邦政府的予算均无法进行估计,但该委员会最近仍试图予测固体发动机的未来。为此,他们询问了固体火箭发动机方面的专家们对今后10～20年固体火箭发动机在应用、经济、性能发展趋
During the two decades between 1955 and 1975, solid propellant rocket engines advanced rapidly and replaced liquid propellant rockets in all aspects of tactical, strategic, and cosmological applications. In general, the choice of solid rocket motor liquid rocket engine cheaper than the price, and the reaction time is short. It appears that the main use of liquid rocket has to retreat to the task of requiring multipurpose, high performance, multiple starts and shutdowns, and throttling control. In the future, solid rocket motors may also be replaced by low-cost air-jet propulsion or liquid rockets for certain missions. Although the American Society of Aeronautics and Astronautics’s Solid Rocket Commission can not estimate international political and national views and priorities as well as the federal government’s calculations, the committee recently attempted to predict the future of solid-state engines. To this end, they asked experts in solid rocket motors on the future 10 to 20 years of solid rocket motor applications, economic and performance development trend