单级火箭

如果采用目前的燃料，科学家们认为单级火箭达不到逃逸速度。

With present fuels , scientists agree that a single rocket can not attain escape velocity .

但要挣脱地球引力和克服空气阻力飞出地球，单级火箭还做不到，必须用多级火箭接力，逐级加速，最终才能达到宇宙速度要求的数值。

But to break free of Earth 's gravity and fly out to overcome the air resistance of the Earth , single-stage rockets can also be used STEP-ROCKETS relay , one level to speed up the end of the universe to reach the speed of the numerical requirements .

考虑一单级主火箭带一组或两组助推火箭，在喷气速度递增的条件下，给出其优化准则；

In this paper , for the one-stage rocket which has one or two boosters , the optimization rule when the effective jet velocity increases in order was obtained .

论单级入轨火箭运载器的发展途径

Review of the Development Way for Rocket Vehicle of Single Stage to Orbit

提出了一种进行单级和多级火箭飞行方案设计的一般方法。

A generalized approach to flight program design for single and multi-stage rockets are presented .

论证了水平发射单级入轨火箭运载器的可行性。

The feasibility of horizontal launch of the vehicle of single stage to orbit is discussed .