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约找到 7826 条结果,耗时 0.364 秒
拆了荧光棒
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15年5个月前
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内容:原因是KN成本低、原料相对易获得……不是谁都能搞到全套原料的所以在科创,讨论KN的理论贴含金量远比其他
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喷气推进
内容:我來說明一下,最後發射的火箭從研發
燃料
開始到最終發射的總成本在4w7以內 其最終發射的火箭製造成本在一萬元不到,發射架成本700元 其中12萬元的剩餘的近7萬元中,有1w4用於實驗室租金,3.4w用於航電製造
白鸟计划(持续更新中)最近更新至2023年11月12日
XYSC
1年10个月前
回复于
喷气推进
内容:那就相当惊人了,土星五号可是由五个发动机提供的3400多吨的推力,而如果你能够做到,那可不仅是应用上的一次进步,用何种
燃料
,何种结构,用何种材料来承受巨大的室压和过载,这是理论上的一次巨大飞跃,或许您将成为与钱学森
无线、国防安全及汽车电子驱动半导体产业的发展(下)
mass_lynnxy
18年7个月前
发表于
电子技术
内容:“我们估计在2010和2015年之间,电子组件的比重将翻番,占到我们机动车价值的40%,”包括混合
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车,根据Strategy Analytics公司的研究报告,这使得混合
燃料
车所用电子器件的数量是普通汽车所用的三倍,,当然,在路上跑的混合
燃料
车比普通汽车少得多。,Strategy Analytics公司称2005年有335,000辆混合
燃料
车上路,并预期到2013年这个数字将上升到约占全球机动车当年产量的4%。
潜力无穷的薪炭林
大仙
16年6个月前
发表于
电气电工
内容:后来被煤、石油、天然气等化石
燃料
所代替,薪炭名落孙山。,木质
燃料
不含硫,燃烧的剩余物是理想的肥料。
简易火箭飞行前的照片,身姿如何?
dw8wb
9年5个月前
回复于
喷气推进
内容:而且,你装几百克的药,放出的热量的足以化掉多少根PVC管你知道吗,虽然说还有大部分热量跑到空气里,但在如此高的温度下连喷口都会化掉 最后再说一句,你那个虚心求教那个也不是这种
燃料
,apcp都是烟少,而且有火焰
求改进建议/评价 | 新人设计-金属KNSB发动机
浪里黑条
5年1个月前
回复于
喷气推进
内容:2.环氧管在绝热性能上不比PVC强,并且在火箭
燃料
的燃气冲刷下,130度的耐热可以忽略不计,相比PVC的主要优势就是不会释放氯化氢了(但是在燃烧室那种负氧平衡的环境下可能烧的比PVC慢点,这个要实验才能确定
15年制作的MSFRM-IB 模型火箭发动机
小科学
8年10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5.使用石膏喷喉(微型火箭的
燃料
工作的时间较短
YT-3发动机爆炸原因分析总结(1)—金属结构
乖老汉
13年2个月前
回复于
喷气推进
内容:另外,即便是假的6061,耐压也应远超设计的6兆帕,还是应该在
燃料
问题入手找原因。
《导弹总体结构设计网络课程》
虎哥
16年6个月前
回复于
喷气推进
内容:助推器主要参数的选择 助推器的主要参数是助推级末速、工作时间和
燃料
相对质量系数(或)。
英国大学生自制的火箭升空了
wink101495
15年11个月前
发表于
喷气推进
内容:虽然这些自制火箭都是装载黑色火药作为
燃料
,并由电子开关点燃,但却能够形成不同等级的推进速度。,当
燃料
耗完时,一个爆炸将使火箭的头锥体与机身分离,并打开一个小型降落伞,时间和高度是至关重要的临界因素。
两艘中型火箭月球样品取样返回方案的猜想
帝江航天空间动力
8个月28天前
发表于
喷气推进
内容:不过我们在这里是以节省
燃料
为目的的。,根据引力原则与天体力学,可知Pe点越高,在Pe点加速供点抬高的运动效率越大,所消耗的
燃料
越小。
[注意]关于93火箭数据真实性的理论计算
93°
17年3个月前
回复于
喷气推进
内容:以下是引用HMX在2007-12-18 23:39:51的发言:120克
燃料
把2.5KG的载荷打到200m高并非难事,但那个是炮弹,膛压很高。
Re:回 1楼(ehco) 的帖子
ehco
13年1个月前
回复于
喷气推进
内容:因为这里液相的密度远远高于喷前压强下的气体密度极端一点,1:1的氧燃比下,气态氧化剂和液态
燃料
质量流量相同,然而此时喷射速度必然都是几十倍(密度倍率)的差异了。
火箭版块索引(2013.8.15更新)持续更新...
wangjchen
11年6个月前
回复于
喷气推进
内容:XXXXXXXXXXXXXXXXXXXXXXXX/t/30813 固体火箭发动机内弹道模拟软件 更新 添加图象数据CSV输出 XXXXXXXXXXXXXXXXXXXXXXXX/t/30978 [固体
燃料
火箭版研究课题综述与推荐(不断更新中)
拔刀斋
13年3个月前
回复于
喷气推进
内容:结论:把32mm这个规格重新捡起来,结构材料改成45#钢,
燃料
用KNDX/SB,频繁发射。
spacex的回收火箭
biggigi2002
10年0个月前
回复于
喷气推进
内容:的理想是 吧火箭当飞机那么使 落下来加油 不检修 直接走你…………………… 火箭减速当然要牺牲一定的发射负荷 但是对于复用火箭来说这个根本不是问题 火箭造大点就解决了 反正每次只消耗
燃料
准备开造液体火箭发动机,向大家打听一下
314152
5年8个月前
回复于
喷气推进
内容:最大的风险大概是加注时意外泄露或者是储罐加压时泄露导致自燃
燃料
混合然后引起爆炸(发动机爆炸的碎片也许也会引起储罐破裂,但是往发动机和储罐之间做隔离可以避免这种风险)。
回 75楼(拔刀斋) 的帖子
焓熵`
11年6个月前
回复于
喷气推进
内容:110mmRNX星孔發動機地面測試曲線,在4s後有低推力拖尾 因此這次發射的發動機將初始噴燃比提高到1200,所以提高了發動機推力峰值也提高了出架速度請問拔刀斎,這次YT4發射是否存在緩燃(及已經有部分
燃料
開始燃燒
对这个感兴趣的朋友来讨论讨论(姿态控制的方法)
kight11
11年11个月前
回复于
喷气推进
内容:燃气舵比矢量喷管容易做得多,但是业余发动机工作时间短,
燃料
烧尽后还是要靠舵面。
回 71楼(vip2005pig) 的帖子
希特勒玻珠子
11年5个月前
回复于
喷气推进
内容:一般是漫过
燃料
就行了,硝酸盐的溶解度曲线很陡,水到达100度可以溶解自身两倍的硝酸钾。
开学了....火箭板块好冷清啊!
导弹迷
14年11个月前
回复于
喷气推进
内容:有一定的化学基础和物理基础后,我们这些业余爱好者研制一种新
燃料
是有可能的。
[原创]水火箭的助推器的制作过程
huangxun
13年2个月前
回复于
喷气推进
内容:ps:不是不想搞真正的固体
燃料
火箭,家长不让弄呐…寒假我就试试自制个黑火药火箭…现在又有个新构思,能不能用水火箭把黑火药火箭推送到一定的高度在空中发射黑火药火箭呢?
Mr_清澜山主
1年7个月前
电文
查看详情
内容:2、硝糖
燃料
该怎么放进发动机呢?
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