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起飞 入轨!长征五号火箭完成全部使命需1810秒

2017-07-02 10:32:38   央视网

长征五号火箭飞行过程,大约需要1810秒的时间,起飞后的17秒,火箭将不再垂直向上飞行,而是拐一个弯,这个动作叫做程序转弯,主要是要沿着地球的倾斜度来飞行,来节省火箭的燃料。在飞行过程中,一级火箭、二级火箭以及四个助推器就像是六个巨型的燃料箱,装满燃料为火箭提供强大的动力。但当每一个部段的燃料耗尽时,这个“燃料箱”就变成了火箭继续加速的负担,为了让火箭轻装前行,就必须把这些负担抛掉。

飞行到约174秒,火箭四个助推器完成任务,与火箭主体脱离。285秒,此时长征五号已经飞出大气层,保护有效载荷的顶部整流罩结束了自己的使命,与火箭分离。465秒,一级火箭燃料耗尽,一二级火箭分离,火箭二级发动机启动。约753秒,二级发动机关闭,火箭进入滑行阶段。约1355秒,二级发动机进行二次点火。约1714秒,火箭二级发动机在达到预定目标后停止工作,96秒以后,星箭分离,火箭将有效载荷送到预定轨道,长征五号火箭就此完成了它的全部使命。

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