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约找到 871 条结果,耗时 0.575 秒
已解决:熔融法
KNSB
不能凝固是为什么
baxyz
6个月19天前
发表于
喷气推进
特殊话题: 提问/求助
内容:试制
KNSB
,以电炉加热SB至半透明后关火,加入KN并浇筑,得到粘稠半固体冷却至室温后还是半固体,以手捏之,其中有颗粒形态的KN,但是整体为膏状的一坨,显然无法使用这是由于成品中含水吗?
RJ-2号
KNSB
微型探空火箭首飞
ClCl杰
1年9个月前
发表于
喷气推进
内容:锐箭2号(RJ-2)搭载了自研塑料机 R -1,使用
KNSB
固体燃料下面是发动机试车视频电子秤出现故障,未能采集到推力,估计推力超过了50N,推力持续时间大约一秒火箭采用侧盖机械开伞下面是火箭试飞的视频第一视角阵地相机视角火箭飞行高度大约
关于
knSB
发动机药柱内孔选择
拉格朗日L2点
3年0个月前
发表于
喷气推进
特殊话题: 提问/求助
内容:选用1%二茂铁或三氧化二铁催化的
KnSB
。
第三代
KNSB
55mm/200mm/三代改AP基34mm 固体火箭发动机设计
秦飒
2个月23天前
发表于
喷气推进
内容: 一、设计前言 由于历代设计的固体火箭都避不开燃料问题,对于我们团队而言面对
KNSB
低比冲、易受潮等缺点十分无奈,这个时候我们想要寻找另外一种燃料来进阶。,显然AP基燃料对于我们团队有很大的吸引力,又无奈与AP涨价从原先的200元1kg到现在的230元500g(本人已知的渠道和市场价)高成本下在原先设计的3代(使用
KNSB
型燃料56mm/200mm)基础上设计小型,二、设计创意 由于
KNSB
的低成制作工艺简单使用在本次3代56mm/200mm级的中型固体火箭发动机。
和萌新浅聊
KNSB
燃料的制备的一些常见问题
Marx
2年9个月前
独立文章
内容:这里我们就先只聊一下入门燃料(
KNSB
)的制备相关问题。,这里其实都可以使用,总体而言各位都比较推荐使用金属器皿,主要考虑因素为导热效果还是金属最好,毕竟
KNSB
的制作流程的关键因素就是控温,在恒温加热的前提下自然是金属最优,玻璃、陶瓷次之。,而@以太LYB 的经验中,
KNSB
的合成是可以先混合后再进行恒温加热的(预混加热)可参见其文章,但他也专门提到只是在保证可以精确控制温度的情况下,这种条件下甚至可以长时间熬制。,预热二三十分钟如果混合之后流动性不佳,就继续恒温加热,到130℃左右,如果恒温条件不怎么好的话,就不要继续加热了,等冷一些的时候像橡皮泥一样手搓然后塞进模具也可以,比如电磁炉,这种靠间歇加热控温的,直接加热最容易出事”小结总体而言,
KNSB
,只要温度控制得当
KNSB
的制作过程几乎不会出现危险情况。
D2组
KNSB
火箭发射失败……
八哥
11年7个月前
发表于
喷气推进
内容:----------------严格按照比赛规则……首先是发射前的照片一些参数:火箭长:42.5cm发动机内径:1.8cm发动机长:15cm药柱长:11cm喷喉直径:0.4mm全箭总重:283g燃料:
knsb
55mm全金属
KNSB
发动机
ww
2年4个月前
发表于
喷气推进
内容: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
30mm金属
knsb
发动机研制及试车
Catal
3年2个月前
发表于
喷气推进
动手实践: 实验报导
内容:但是因此我做药柱时还专门拿四氟乙烯定制了模具……药柱制作时由于我在学校里没能拍到照片,不过热熔法
knsb
也是常用的方法了,也没什么要拍的试车药柱制作完成后进行装机~之后我就迫不及待地去进行了试车试车过程好看的瞬间燃料测试总结我个人认为这次的试车还算不错,个小时我就尝试把它脱模,结果心急吃不了热豆腐,脱模出来它还有一定的可塑性,结果……形变了,白给第二段药柱我“吸取了”第一段的教训,浇筑完后我足足等了一整天才脱模,但是我发现……已经脱不出来了……这是我第一次做
knsb
夜航星-
knsb
发动机报告
夜航星
1年0个月前
发表于
喷气推进
动手实践: 实验报导
内容:可以避免烧蚀的问题图中积碳为初次试车时发动机设计不完善爆堵头导致研磨设备:搭建球磨机-------------------------------------------分割线下面火箭发动机测试数据(多图警告)
knsb
测试了三个
KNSB
药柱,实测推力与软件计算相差甚远
jsjyzyb
9年1个月前
发表于
喷气推进
内容:测试了三个
KNSB
药柱,实测推力与软件计算相差甚远,想请教一下是为什么?
40MM-
KNSB
火箭项目(进行中)
Mazed
2年10个月前
发表于
喷气推进
特殊话题: 提问/求助,动手实践: 实验报导
内容:.😅)发动机数据来源如下预定药柱数据:200mm长*36mm最大直径*7mm燃烧孔
KNSB
这里也是我们的第一个问题:此处是否有计算错误?
KNSB
火箭的制作经验(过程)
飞哥
11年8个月前
发表于
喷气推进
内容:首先要正式做一个火箭起码的原料是不能少的.下面我们以
KNSB
燃料为例制作一个中型火箭.先去买再说吧.奔到化学试剂店,当然你最好问问你们化学老师哪里有卖,实在不行去找化学老师要点.硝酸钾AR(这是指物质纯度
knsb
金属发动机推力的讨论
ww
2年3个月前
发表于
喷气推进
内容:又用分析试车数据得到的压强和质量流量估算了一下燃速:算得在3.5Mpa时燃速大概在7.9mm/s左右,与论坛里
knsb
燃速数据基本相符所以大概是没问题…的吧?
40mm
knsb
金属机(新人入坑之作)
ww
2年4个月前
发表于
喷气推进
内容:因为辣鸡高二生看不懂公式又去自学了一下工程热力学,流体力学和微积分之类的)由此便可计算喷口的各项数据(写了个Python的小计算器)设计的燃烧室压强是10mpa,材质是45#钢,为了安全壁厚取2mm,隔热层是ppr管,堵头是二保焊焊上去的燃料用
knsb
【YL-1AG】曜灵1号甲改 41.25mm直径
knsb
火箭发动机设计
MagneticFlux
3年0个月前
发表于
喷气推进
内容: 完成了一发
knsb
火箭发动机的设计,以下为数据: 药柱直径:41.25mm 药柱长度:200mm PVC隔热层:厚度:2mm 内径:
knsb
再次测试
薛定谔的海森堡
5年0个月前
发表于
喷气推进
上次的发的管理员给我归类到烟花技术,不由得感受到了深深的恶意和嘲讽。由于b级考试没过,所以不能回复之前的评论。在这里抱歉一下。为了显得专业一点上两张图,这个两百n的理论值还是吓到我了。而且这个一点几秒的燃烧速度也是吓到我了燃烧速度四五秒左右,如果上电发应该可以达到起飞要求的两三秒。还是比较满意的,硝酸钾山梨醇精确66:34配比。因为硝酸钾纯度问题有不少黑渣,应该是naoh把山梨醇碳化了。因为憨憨队...
和同学进行
knsb
燃料试点燃与确定火箭发动机
九又
6个月6天前
独立文章
内容: 本人初次接触
knsb
燃料,原料才到便迫不及待的约人试燃了 硝酸钾选择:天脊农业硝酸钾肥料(N>13.5 K2O>44.5) 山梨醇选择:天津市华盛化学试剂有限公司山梨醇(AR)
KNSB
模型火箭的制作与发射(简易组装型)
zsjzsjzsj
2年5个月前
发表于
喷气推进
动手实践: 实验报导
内容:那么第一步就是选择燃料,我选择的是kn系列燃料,后期我都是采用的
KNSB
(硝酸钾-山梨糖醇)。,资料:
KNSB
是一种以硝酸钾和山梨醇为主要成分的固体火箭燃料,一般用于DIY小型火箭。,基本信息中文名称硝酸钾-山梨醇燃料外文名称
KNSB
标准配方 KN65% SB(山梨醇)35% 理论比冲 164s实际特征速度 914m/s
KNSB
的所有数据标准配方: KN(硝酸钾)65% SB(山梨醇,实际特征速度: 914m/s理论燃烧温度: 1327摄氏度实际燃烧温度: 1247摄氏度理论密度: 1.841g/cm^3熔铸密度: 1.82g/cm^3推力系数: 1.468自燃温度: 大于300摄氏度
KNSB
【试车成功】十字孔装药32mm金属壳体火箭发动机试车成功(
knsb
燃料)
飞鹰航天
2年2个月前
发表于
喷气推进
动手实践: 实验报导
内容:设计最大耐压为10MPa,许用压力为6MPa,喷管扩张比为
KNSB
燃气5MPa最优扩张比。,推进剂为
KNSB
,比例为KN:SB=60:40。
50*340mm
KNSB
发动机测试
arminarlart33
9年1个月前
发表于
喷气推进
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...
初次发射
knsb
火箭的记录
Mr_清澜山主
1年6个月前
独立文章
内容:终于是放暑假了,作为一位准高一学生,暑假大把的时间都用来玩硝糖火箭了,这不刚借助开源火箭做了一个模型火箭,来到乡下空旷地测试,之前在家测过推力,和计算的大概差5~6N,也是能举起火箭了,它长这个样子:装药大概三分之二,喷口与箭体连接处用泥土封起来,心想一烧就会变硬实,堵头也是用的泥土封顶。一切准备就绪后,我将它放到自己准备的发射架上,准备第一次试射,然而....失败了,点火失败,我等烟冒去后取回...
KNSB
增韧制作点火棒
bkh123
13年8个月前
发表于
喷气推进
一般把扫尾燃料搓成条作为点火棒点发动机用,但材料脆容易折断,故增韧处理。看视频:XXXXXXXXXXXXXXXXXX/v_show/id_XXXXXXXXXXXXXXXXml
回 8楼(
knsb
) 的帖子
inception
12年5个月前
回复于
跳蚤市场
最右边的。
失败的25mm
KNSB
PPR 火箭
YunKun
4年7个月前
发表于
喷气推进
寒假期间的失败项目放假前心血来潮,莫名憧憬模型火箭于是乎,在科创潜水数周,也在放假后开始制作。遗憾的是最后自制点火头再真正发射时无法固定,导致无法点火,疫情期间也无法购置新材料,搁置后,进入紧张的网课生活,写下此贴以作纪念。采用的是25mm的ppr作为发动机壳体,然后上下均用垫片和螺丝固定,模仿着XXXXXXXXXXXXXXXXXXXXXXXX/t/83352 @Winter的PPR发动机制作。@...
回 34楼(
knsb
) 的帖子
power_rdx
12年5个月前
回复于
跳蚤市场
我都很久没卖过萤石了,你在哪看的?
一个自制ppr管机
knsb
的制作
星星抱蛋
1年7个月前
独立文章
内容:使用质量7:3的硝酸钾和分析纯山梨醇,浇筑而成..技术不成熟,含有高血压操作,请多多指点
回 24楼(
knsb
) 的帖子
370596521
12年5个月前
回复于
化学
很荣幸,我自制硫酸成功过,AR级肯定没有,正常硝化绝对没问题,方法就是上面的方法~~
回 26楼(
knsb
) 的帖子
St_Maxwell
12年5个月前
回复于
跳蚤市场
你故意的吧?firstly,我有萤石;then ,我和你家直线距离不到300米,包什么邮?
回 13楼(
knsb
) 的帖子
bh,王者归来
12年1个月前
回复于
喷气推进
我们只不过借用了一下南京理工大学里的实验室做交流场地,这还是焓熵同志提供的,我们并不是南理工的学生。
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