搜索 - 科创

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问题：１.长径比太低，再加一倍长度还差不多２.喷口太细，加到三分之一内径比较合适３.发动机外壳重量所占比例太大，燃料与外壳重量１：１比较合适

用金属做管绕在外壳上；或在外壳内弄上输送管道，输送酒精，利用工作时产生的热气化酒精，同时冷却发动机增加推 =============zhe这样会不会引起爆炸，个人愚见。

可以加个透明的塑料外壳，2个插口做在外壳上，底下和顶上开散热孔，去掉led灯，视频介绍各种炫酷点烟，放在易贝上卖高价。

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