搜索 - 科创网

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本帖最后由 twoone 于 2014-3-8 22:06 编辑这几天放月假，所以在昨天和今天完成了PPR发动机燃料采用KNSB。大的图片上传不了啊。。。传了一部分，剩下的只能去我相册里看了[s:10] 热熔注法，比例本来是65（KN）:35(SB)，但是通过实验发现这硝酸钾里面混了很多水。所以称70gKN和35gSB比较合适~ 鉴于安全方面的...

前几天的发动机测试，为将要进行的火箭发射测定延时时间和点火可靠性等。燃料KNO3 66%+山梨醇34%+极少Fe2O3。装药分3段外径46mm内径8mm 五端面可燃在发动机顶部有RNX拉烟延时药柱，但是燃速过慢最终决定使用NE555定时开伞。视屏显示建立工作压力大约有1.5s延迟。应该是因为在靠喷口处点火造成，最终发射将使用嵌入堵头的高能点火药柱点燃发动机。外壳使用内50.5mm外52.4...

这是我在喷气推进板第二次发帖，上次40mm的金属机来验证一下公式和仿真（详见https://www.kechuang.org/t/88164 ），确定无误后就计划搞个更大的发动机。这次发动机设计过程与上次相同：整体设计喷燃比确定（燃烧室压强取10Mpa）：喷管设计：喷管采用45#号钢加石墨喉衬：135度甘油浴KNSB：隔热层用外径50mmPPR管：试车：因为我arduino板烧了，所以这次我的试车...

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