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文号D890332

编辑文章

探天一号火箭事故分析

矢拓探索2024-08-09 IP:河南

关键词

火箭发射事故

先简单附上几张图

可以看到整体全都碳化了，发动机原来8mm喉口下来直接成3cm了，这可能是发射失败的原因之一，大体说一下，火箭直径是63mm，总长没量，大概1.5m，发动机直径45mm，喷口8mm，采用环氧树脂与氧化铝的复合物，加了一个垫片

VID20240720182821.mp4 点击下载 ‎

使用3D打印倒模出来的（朋友弄得模具）

接下来看一下发射视频

VID_20240807151415.mp4 点击下载

离开发射架后还转了一圈，这估计是发动机工作异常导致的，可能也重心不稳，接下来我说说发动机

可以看到点火后等待了大约7秒左右才离开发射架，首先排除燃料受潮，这是我先做的，放的时间不足3小时，除非掉水里，不然说不过去，我后面猜测可能点火头插的太浅了，只点燃了燃料柱表面，可这也导致尾气自下而上，烧了上面的航电部分（中间都是贯通的），然后从事后发动机的喷口来看，可能前面燃烧时间太长，导致喷口脆化，直接把他冲开了，可以参考之前的测试看看

VID_20240731150223.mp4 点击下载 ‎

燃料直接点燃，后面是密封问题，导致侧面温度过高失压

VID20240731155046.mp4 点击下载 ‎

可以看到这一次的喷口保留较为完整，这也验证了前面的说法，总之，发动机测试不通过，我也是硬着头皮发射的，这也算是一个次教训吧，可惜了，航电部分没有验证。

就这样吧，下次还是用金属机子

全部只看作者

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WEIZHANGLI 实习会员

2年3个月前 IP:浙江

D890564

1楼

航电部分我是重点保护的因此我设计了一个应急分离系统，通过温敏电阻和舵机控制分离，中间还加了很厚的阻燃隔层。怎么没带灭火器，这次没有着火，下次就不一定了

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沉默彩虹

2年2个月前 IP:河南

D890648

2楼

是不是气动外形的问题？完成气动和重心设计后在open rocket里看一下稳定性是否在1.5～2，如果不是就改气动或重心，不然难以保证稳定飞行。

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