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模型火箭重心(CG)和压心(CP)的确定[转贴]
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喷气推进
严肃内容: 专业科普
内容:压强的选择更多的是通过这些方便获得的壳体材料的参数算一个大致的耐压(这部分如有需要可以出进阶教程),然后取一个安全系数,得到一个能充分压榨材料性能的压强,通过论坛上或者自己写的内弹道计算软件,导入knsb或者其他
燃料
的数据
火箭基础知识手册【包含板块索引】(新手必读)
leeqingyang
13年1个月前
回复于
喷气推进
内容:<二>
燃料
的压制 我们希望药柱的密度大越好,所以需要尽量将药料压实.
21世纪的十大超级武器
mass_lynnxy
18年11个月前
发表于
极客DIY
内容:据称,该室的40毫米“闪光”炮弹,将塑料
燃料
激光棒装在炮弹中,发射出去的炮弹爆炸时发出闪光,其强度足以使人或传感器系统暂时失明或失效。
Richard Nakka's Experimental Rocketry Web Site--Safety翻译转载
霧隱
7天14时前
发表于
喷气推进
内容:虽然还有材料制作
燃料
,但我也就因此把一味乱做的发动机放在一边了,想着先学习理论再来引领实践,最近几个月都在入门固体火箭发动机原理的知识,看教科书在发动机设计的顺序那方面有点理不清,不知道设计一个合适的发动机该从哪里开始
机械工程关键词汇总——中英文对照
studyboy
19年1个月前
发表于
电子技术
内容:resistance 摩擦阻力frog 分线器front fillet weld 正面角焊缝front number plate 前路牌front plate 前板front plate 前板fuel
燃料
,(燃油)fuel density 燃油密度fuel distillation range 燃油馏程fuel fouling 呛油fuel knock(gas knock)
燃料
爆燃fuel mixture
科创航天局将择机发射万户0型二级火箭
wall哥
13年3个月前
回复于
喷气推进
内容:由此造成的也是
燃料
浪费问题。
第五节 新材料技术
大仙
16年6个月前
回复于
科学技术学
内容:它的这种特殊性能用途极广,如可取代汽油作
燃料
,可用于均化电厂负荷贮存热量、采暖、制冷等。,20世纪70年代中期,一些国家利用新的技术制造焚烧炉,用垃圾作
燃料
产生蒸汽或电力,目前得到一定的推广。
第三节 现代化学的发展
大仙
16年6个月前
回复于
科学技术学
内容:火箭、导弹、人造卫星、航天飞机、核潜艇、航空母舰等各种国防技术的发展,需要各种特殊结构的材料和高能
燃料
。,在卫星能源方面,不仅要研究化学电池,还需要研制和试验硅光太阳电池和
燃料
电池。,而这些材料和
燃料
的研制,则需要合成化学、结构化学、分析化学、化学热力学、化学动力学和核化学等许多化学分支学科配合。,在今后几十年内人们将利用太阳能,从水中制取氢气;将通过一氧化碳和二氧化碳的还原,来合成
燃料
;还将通过化学和其它学科的共同研究,达到消除污染、美化环境、减少疾病、延长寿命的目的。
第四章 现代自然科学的发展
大仙
16年6个月前
回复于
科学技术学
内容:依照这种设想,在原子弹外层包上一层聚变
燃料
,利用原子弹爆炸时产生的高温、高压来点燃聚变
燃料
,就可以制成比原子弹威力大1000倍的氢弹。
常用危险化学品贮存通则[长帖]
虎哥
16年7个月前
发表于
化学
内容:氯气能与许多化学物品如乙炔、松节油、乙醚、氨气、
燃料
气、烃类、氢气、金属粉末等猛烈反应发生爆炸或生成爆炸性产物。
高功率火箭安全规定(使用商品发动机)
拔刀斋
13年2个月前
回复于
喷气推进
内容:如果火箭
燃料
中含有海绵钛(注:用在烟花中产生火花飞溅的效果),这个半径应乘以1.5倍。
第三节 生物技术
大仙
16年6个月前
回复于
科学技术学
内容:生物
燃料
排放物通过一定技术处理不仅不会造成空气污染,还会起到净化空气和水源的作用,所以又是清洁能源。,当前利用生物技术开发生物能源主要有以下几个方面:①栽培能源植物;②利用生物技术将有机废物中的能量转化为
燃料
;③制作"生物氢"和"生物电池"。
托马斯?亨利?莫雷的天线系统
nuoyazhou
9年6个月前
回复于
极客DIY
内容:我们已经提出的观念就是必须要“燃烧”
燃料
才能获得能量,使用电池“用完了”时,你必须不断转动发电机的轴以求能够从中汲取出电流来。,无需
燃料
,能量每时每刻都在我们周围。,无需采用任何种类的
燃料
,因为这种能源可以直接被远洋邮轮、铁路、飞机、汽车、或任何形式的运输工具所拾取。,它已经运行,在全负荷下持续运行而没有消费任何类型的
燃料
,没有机械的原动机,通过来自宇宙的振荡维持着;一个能量变换器,或转换器,具有转换高频、转换宇宙辐射的高能级能量为可用的频率和电压的电流。
关于火箭的压力中心和质量中心的讨论
星空mir
17年8个月前
回复于
喷气推进
内容:然而,偶尔也会有意外的情况发生,一些原本不稳定的模型火箭,在消耗掉一部分
燃料
后,其重心位置会前移,而导致其压力中心与重心的相对位置发生本质性的变化,在经过连续几个翻滚过后,在随机位置和状态下,模型火箭由不稳定转变为稳定
第九节 环境保护技术
大仙
16年6个月前
回复于
科学技术学
内容:后者有核武器试验、核
燃料
的开采和加工、核反应堆和原子能发电站、核动力潜水艇和航空器、高能加速器及在工农业、医药、科研等各部门使用的放射性核素。
爱迪生传
1211
19年3个月前
回复于
科学技术学
内容:接着,爱迪生又想找到一个煤气昂贵而
燃料
却很低廉的地点作试验。,向那里运煤要花不少钱,因此发电站的锅炉只得使用木炭作
燃料
。
求教固体火箭稳定性
李松
9年9个月前
回复于
喷气推进
内容:然而,偶尔也会有意外的情况发生,一些原本不稳定的模型火箭,在消耗掉一部分
燃料
后,其重心位置会前移,而导致其压力中心与重心的相对位置发生本质性的变化,在经过连续几个翻滚过后,在随机位置和状态下,模型火箭由不稳定转变为稳定
发生认识论原理
HMX
19年2个月前
回复于
科学技术学
内容:可是,构想出这个组合,把一系列相当数目的不同质的学科数据(从天文学的数据到
燃料
的性质)中的多方面的因素联系起来,这是一回事;而具有探索这种组合的念头则完全是另外一回事。
1.3 取缔火箭团体
李挺诺夫
8年3个月前
回复于
喷气推进
内容:引擎推力: 250kp (设计) 150-200kp (实际) 高度: 2.50m (约) 净重: 70kg (约) 起飞重量: 100kg (约)
燃料
: 液氧 + 酒精 50L (大致) 飞行时间:
[讨论]学术分制度是否可改进一下
虎哥
18年0个月前
回复于
化学
内容:、放热、使石灰水变浑浊 S+O2 点燃SO2 剧烈燃烧、放热、刺激味气体、空气中淡蓝色火焰.氧气中蓝紫色火焰 2H2+O2 点燃2H2O 淡蓝火焰、放热、生成使无水CuSO4变蓝的液体(水) 高能
燃料
1
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