搜索 - 科创

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对于塞式喷管的火箭，可以安装在喷管座上。良好的点火应当得到下图蓝色所示的点火曲线。红色通常是点火药燃速太快且不足，黄色是点火药燃速慢且不足的现象。测定燃烧室压强有利于及时发现和纠正不良的点火。

当然也可以用其它的技术，譬如美国在90年代的 X-33试验的洛克达因公司XRS-2200线性气动塞式喷管发动机，喷管面积比达到173，在燃烧压力与SSME相比下降三分之一的情况下，真空比冲竟然相差无几。

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