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助推器与主发动机推力级的配置使导弹在要求的时间内推进到某一要求的速度提供了最有效的方法,这早已被人们所承认。推力级的配置指应用一系列的连续的推力级。这种方法通常用于地面发射的导弹,它反抗地心引力与高阻力从静止状态加速,由于空中发射的导弹有运载机的速度作为它的第一级速度并且由于他们通常在较高的高度发射,此时初始阻力的影响降低了,所以推力级的配置与通常不同。但是,即使对空中发射的导弹,双级装置也常碰到。
It has long been recognized that the configuration of the booster and main engine thrust stage provides the most efficient method of propulsion to a desired speed within the required time. Thrust-level configuration refers to the application of a series of continuous thrust levels. This method is usually used for ground-launched missiles, which accelerate from rest state against gravitation and high resistance since missiles launched in the air have the speed of the carrier as its first speed and because they are usually at higher altitudes Launch, this time the impact of the initial resistance is reduced, so the thrust level configuration and usually different. However, two-stage installations are often encountered even with missiles fired in the air.