搜索 - 科创

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2.采用由铝合金、钢管、铁片组成的全金属拉瓦尔喷口，工作完看不到稍蚀，可显著提高火箭效率。所以，M11系火箭将是塑料水管火箭中的精英<cc></cc>

不是啊，热火箭效率太低了，干冰箭效率相对来说是非常高的。发射前做的实验数据如下：干冰2L，补热装置用的是家用的3个热水器，喷口1.2CM，平均推力10KG左右，持续时间约53秒。

如果以火箭箭体和地球的共同质量中心为参考，火箭喷出去的工质动量被空气吸收最终作用于整个地球，以地球质量和火箭质量之比来分配动能，火箭几乎获得推力所提供的全部动能，那么这个时候，火箭效率基本等同于发动机效率

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