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约找到 1352 条结果,耗时 0.237 秒
一个不切实际的立项
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55mm全金属KNSB发动机
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2年1个月前
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13年8个月前
回复于
喷气推进
内容:其实在条件允许的情况下,将二级和一级的连接部做成子母口的方式,空隙稍微加一些固化不热熔且润滑东西,例如
石墨
粉之类。
石膏材料喷口制造过程
维德
3年4个月前
回复于
喷气推进
内容: 同意二楼,现在测试新材料的确没什么大意义,费时费财,各种材料该试的前辈们都试过了,能留下来成精品贴的就肯定能行的,像二楼说的光固化,或者前面winter他们的
石墨
或钢,都是不错的材料,拿来直接上手即可
电解氯酸钠制高氯酸钠。。。。快来围观铱钽钛阳极和高强石墨
ddomax
11年0个月前
回复于
化学
内容:钌铱钛阳极不适合酸性和析氧环境,析氧寿命极短,堪比
石墨
。,------------------------------------- 附上各种电极常见槽压: 铂阳极:3~7V,电流密度40~50A/dm² 钛阳极:4.5~5.5V,电流密度>17/dm²
石墨
阳极,价格:铂钛>铱钽>钌铱≈二氧化铅>钌钛 电流效率(析氯):钌铱>铱钽>钌钛>铂>二氧化铅>
石墨
析氧:铱钽>二氧化铅>铂 析氧过电位:铂>二氧化铅>铱钽 电解时析氧属于副反应(如氯酸根氧化)的要析氧过电位尽量高
CuteO₂-40-B型45.6mm发动机第二次试车成功!
Winter
5年4个月前
发表于
喷气推进
内容:发动机设计概略:喷喉直径12mm,长8mm,喷喉材质:
石墨
喷管出口直径25mm,喷管入口直径30mm,喷管材质:耐火酚醛树脂燃烧室:长度300mm,直径35mm燃料:高含铝量APCP燃料内孔:狗骨孔,减面
(最终报告)(欢迎拍砖/YY)(多图)AP基燃料塞式喷管火箭发动机试车以及国内业余界第一次塞式喷管火箭发动机试车
LS
4年11个月前
回复于
喷气推进
内容:看出来一开始点火药的残渣堵了喷口另外,喷管装配很可能是不同心的(看起来是)虽然不清楚是拍摄问题还是什么另外,喷燃比需要好好设计,可以加高一点或者点火药多一点塞锥材料可以换一下such as C看这个,是金属-
石墨
的喷管在一些部位
回 27楼(power_rdx) 的帖子
skyline
11年8个月前
回复于
强激光
内容:1.铅笔不含铅,铅芯是
石墨
和粘土混合制成的 这个我说错了,承认。
压气机及风扇完工
航模发烧友
11年3个月前
回复于
航空技术
内容:钢珠子母弹 发表于 2013-9-30 18:22 如何小,间距已经达到叶片空心厚度的2倍,再大转不起来了,环氧树脂只是临时固定措施,之后要把
石墨
压进 ...关于第一条,压气机简单的说有两部分,即转子叶片和静子叶片
【核史】世界上第一台核反应堆——芝加哥一号堆(Chicago Pile-1)简介
国和中合
4年7个月前
发表于
核技术与核仪器
内容:工人们在木头底座上一层一层的堆叠
石墨
块(中子减速剂)。,部分
石墨
块留有空洞以安置核燃料铀球。,总共用掉了711000磅的
石墨
(约349719.717千克),反应堆一共建了57层。,注意
石墨
块的摆放构成了一个粗略的球形。
意想不到的火箭喷口材料
fujun7311
13年7个月前
回复于
喷气推进
内容:不然我也不会想把它改成混合燃料增加其动力 曾经用
石墨
粉+环氧树脂,KNDX燃料小条火焰直接烧都一塌糊涂…… 我制作燃料时实验过用硝糖燃料小条可以直接点燃就用在火箭基本上没有燃烧的痕迹
论电铸法制作固体火箭喷嘴火的可能性(及其他方法论述与实践)
荷城工业_Nitload_Industry
3个月16天前
回复于
喷气推进
内容:使用电铸法生产火箭发动机喷管壁面是一种非常常见且技术非常成熟的方案,最著名的应用就是美国RS-25氢氧液体火箭发动机喷管扩张段,使用电铸镍工艺,在使用导电石蜡(有说法就是石蜡里面加
石墨
)填充内壁面上再生冷却通道的铣槽后直接电铸成型
第二代小电弧炉
浪里黑条
6年6个月前
回复于
电子技术
内容:LZ可以考虑改用
石墨
坩埚,让电弧直接拉在坩埚壁上,这样加热效率更高。
煤炭灰分熔融性实验相关
darkorochi
12年4个月前
发表于
化学
内容:如用封入含碳物质的方法来产生弱还原性气氛,则在刚玉舟中央放置
石墨
粉15~20g,两端放置无烟煤30~40g(对气疏的高刚玉管炉膛)或在刚玉舟中央放置
石墨
粉5~6g(对气密的刚玉管炉膛)注。,注:除
石墨
和无烟煤外,可根据具体条件采用木炭、焦炭或石油焦。
500N硝酸—混胺50液体火箭发动机热试车
琉璃冬
6年3个月前
回复于
喷气推进
内容:此次发动机立项在2017年8月立项,在9月时设计出初稿,后验算发现设计有缺陷;然后在同年10月份设计出第二个版本的发动机,优化了喷管设计:采用全
石墨
喷管和弧线过渡的使用。
15年制作的MSFRM-IB 模型火箭发动机
小科学
8年9个月前
回复于
喷气推进
内容:---------------------------------对您所说的喷口问题,我有几个改进意见:1.可采用都漏王制作拉喷(对于微型发动机来说,基本没必要)2.使用
石墨
喷喉3.使用电木喷喉4.使用陶瓷喷喉
出点旧货,扔了可惜
薛定谔的猫
12年5个月前
发表于
跳蚤市场
内容:串激电机,由豆浆机拆下,
石墨
电刷缺失,装上电刷就能用 220V的,10元。
有关于液氧、液氢火箭背包的可行性
13721225643
11年9个月前
发表于
喷气推进
内容:想到可以用液氧+液氢做一个火箭背包采用两台或以上的液机驱动,一是增强推力,二是在一台熄火时依然能安全迫降;搭载保温处理的高压钢瓶来储存液氢和液氧,需要配备控压阀,在挥发气体压力达到上限时自动减压;使用
石墨
燃气舵
铝-铜 碱性电池
静观琪变
9年9个月前
回复于
化学
内容:白炭可以自己做,而且原料随处可见,制作起来也很简单,关键就是让木炭在高温下
石墨
化我做的时候大概十几分钟出一批不存在不好找的问题用铝粉烧结出多孔负极材料,想法是可以,但实际操作要考虑多方面的问题。
MSFRM-II 发动机 与 25mmPVC发动机
kc276644985
8年10个月前
发表于
喷气推进
内容:
石墨
喷管与铝管贴合的几乎严丝无缝 扩张段与收敛段其实都是用铁皮做的车刀削出来的,这种方法做拉喷很方便,其实想做钟型拉喷也很容易 先用1mm的钻头把孔的位置定好,然后用台磨机和不同的钻头慢慢把孔钻到,4mm,我觉得这样做比直接用台钻钻4mm的孔要做的漂亮些
石墨
喷管旁边的凹槽是用来填补569密封硅胶的 这个管子直径25mm,就剪一个79mm长的长方形纸条,一共钻5个孔,每隔15.8mm打一个点
加强型石膏喷管材料配比及记录
TonyStark
1年11个月前
回复于
喷气推进
内容:32-82mm的直接上酚醛配
石墨
衬喉当然如果楼主执意进行这项研究,也祝愿能见到LZ的成果!
回 8楼(edison.wrn) 的帖子
鳯仙
11年4个月前
回复于
高电压技术
内容:所以用一个灯丝电源可以你这个管子 放大管和调制管肯定不能一个电源 否则肯定灯丝对阴极击穿的还有就是电极 电晕的侵蚀很厉害的 我这个用的是钨针 虽然功率小 但是也有侵蚀了你这个巨大功率的 估计要钍钨电极或者
石墨
电极
小型轨道炮计划
iSee
7年0个月前
回复于
电磁炮
内容:没人在说你的方案有技术上的问题啊,要是我做的话,至少是复合导轨(外铝+内铜或
石墨
)、分段模式、kv以上高压、压缩气体驱动的注入方式、特制的弹丸等,这应该是我起步的最低标准。,😂恩,没毛病,不过我有一个疑问就是你的复合导轨的材料选择,不知道你这种搭配是否有什么特殊之处引用 iSee:至少是复合导轨(外铝+内铜或
石墨
)既然是用复合导轨,那就意味着内轨是可以被随时替换的,那就没必要用
石墨
这种高阻耐烧灼的材料吧,关键的问题时铝表面的氧化膜,这可能会对接触电阻有一定影响,可能需要经常打磨,而且在接线时为防止氧化需要将线直接含在铝轨上而不能直接压上,不过其实也有一些好处,比如质量轻且价格便宜之类的用铝就是这个用意,用
石墨
是为了减少更换次数
[转][讨论]一种奇怪的固-气发动机设计
Syscus-AC
5年0个月前
发表于
喷气推进
内容:情况零件图,可以看到透明的亚克力棒,
石墨
喷管,密封圈,喷注器,丝杆和固定件装配图,可以看到亚克力棒直接安装,没有金属外壳。
新手造火箭,有两个小问题
梁少博
9年6个月前
发表于
喷气推进
内容:首先,我认为第一种不是很好实现,因为在做的发动机最前端是要用
石墨
堵上的,具体不堵会怎么样我还没有试(这几天期末考试没时间做) 其次,第二种,我的问题是具体是怎样的?
探讨关于高压测量的问题(持续更新)
虎哥
14年3个月前
回复于
高电压技术
内容:类似的,把
石墨
掺入有机材料,制作半导体胶,涂抹成带状,也有较好的高频特性。
最简单的电机(单极电机)原理 孰是孰非?
追梦
12年6个月前
发表于
电子技术
内容:实用上应尽可能加多并联电刷的数目,采用接触电压降小的铜-
石墨
电刷,或用导电和导热更好的液态金属,如水银或钠钾合金等做电刷。
自己动手应对和谐~(电解法制备盐酸)!
xj198398xujing
16年5个月前
发表于
化学
内容:这里所选的石棉板要是质量比较好的不能含太多是粘接剂,因为粘接剂太多会导致隔膜的通透率下降使盐水很难渗透过隔膜,我的直径75MM的隔膜透过溶液的量在20秒/毫升左右) 电极:阳极使用
石墨
KNSU 试车失败 大家帮忙看看
FROZEN巨擘
9年4个月前
回复于
喷气推进
内容:喷管的话我用的是
石墨
应该没什么影响吧如果说的是药柱的话应该怎么防止呢?
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