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内容:无尾翼是靠多个喷口将少量喷气导向侧面,让火箭高速自旋获得
稳定。
,而靠自身推力获得稳定的方法,确实也有,但是.....我们一般管它叫“蹿天猴”
固体火箭发动机试车台
HXKRRRR
8年4个月前
回复于
喷气推进
内容:引用 chemistry02:顺便问一下lz,请问我的设计图中后面的底座的长度和两根稳定梁与钢板的夹角怎么确定?,嗯,总体没啥问题,但是3号部分稳定有必要吗?
宇宙中最冷的五个地方
wink101495
15年10个月前
回复于
物理
内容:但是呢,在微观粒子身上,会出现能量增加到一定程度的时候,他会从无序状态一下子变成很稳定,很有序。,而且要破坏这种稳定状态还需要一些能量,这个时候,虽然他的能量还是很大,很热,但是,从温度的定义而言,他的温度是负数值的,而破坏它稳定有序状态所需要的能量,就这个负温度的数值。
用碳化硅器件做6KV开关电源的可能性
大仙
3年7个月前
回复于
电气电工
内容:就能找到这种东西,性能很稳定的。
STM8单片机制作的3-4V升5V的Boost电路
金坷居士
10年2个月前
回复于
电气电工
内容:百度来的打死看不懂 窝也初中开始搞的 最近才明白并搞真正稳定...
【901】电路板到货,标网DIY正式开工
radio73
12年10个月前
回复于
无线电
内容:高频电路,最后都是调出来的,不是算出来是什么就是什么,你用的这个微调电容,稳定性很差,一个是机械振动方面,另个是温度变化问题,在就是这个电容的介质稳定性不好!
回 17楼(金坷居士) 的帖子
cccyl
11年10个月前
回复于
电气电工
内容:是啊,我当时手残嘛[s:275]而且我的蓝白可调稳定性不是很好,有时手一抖就改变了几伏
自稳定型火箭的可行性(附设计图)
6111cng
8年7个月前
回复于
喷气推进
内容:引用 test22 : 为什么楼主会认为这种方式可能产生稳定效果呢?,压心离重心远,所以稳定,控制无非就是点火开伞外加航拍和Gps
十二硼系列阴离子的制备设想
雪里金簪何处寻
1年3个月前
发表于
化学
内容:B12H12^2-,B12Cl12^2-有独特的【球芳香性】B12单元,化学稳定性良好,也可以转化为B12(CH3)12^2-等其他离子。,无论是电解、金属还原硼氧化物或是氢气还原硼卤化物,产生单质硼的过程一定经过B12单元,但反应条件不会稳定B12单元,B12会继续缩合成硼单质。,碘可以稳定二、三价锆,而其他的卤素哪怕是溴也不行。
DIY 了个简单装置帮助提高晶体生长效率
古法造轮
1年11个月前
回复于
晶体养成所
内容:对于晶体生长来说,保持系统温度稳定或者是保持温度变化稳定比其他的什么都更重要。
回 16楼(玄明) 的帖子
wldshy
13年7个月前
回复于
强激光
内容:半导体激光器理论上只要有合适的能带宽度就可以做出任意波长的激光,只是有些波长不容易稳定的实现而已
穿越机模拟图传改进想法
smith
4个月5天前
回复于
无线电
内容:但画面闪烁不稳定,从频谱看比rtc6105的带宽宽多了,怀疑是没有带通滤波
双氧水和氢氧化钠能共存吗
powkp
14年1个月前
回复于
化学
内容:短时间可以共存,但是双氧水会缓慢分解,因为双氧水在酸性环境中较稳定,而碱性条件下稳定性较差。
出点东西
fusecn
9年11个月前
回复于
跳蚤市场
内容:电压稳定可调吗?
据传万用表显示电量低就不准了特此试验
1176764177
10年3个月前
回复于
仪器仪表
内容:引用 潜伏:你用免换挡的万用表当然不准了,换挡的才准 和档位无关基准源稳定与否才是关键
火箭重心压心对火箭飞行的影响(鄙见)
蜂起4223
2年3个月前
发表于
喷气推进
严肃内容: 专业科普
内容:火箭重心压心对火箭飞行的影响王舸帆 在研究飞行稳定性的过程中常常需要首先确定重心-压心关系(CG-CP relationshi-p)。,如果压心位于重心后端且重心与压心距离为两倍箭体直径以上,我们就可以说这个火箭是稳定的。,这也可以叫做自稳定性。,反之,如果火箭重心与压心距离不到两倍箭体直径甚至重心在压心上面,那么火箭就是不稳定的,微小的扰动产生影响会随着火箭倾角扩大而增大,最后火箭就会加速倾斜。 ,所以,为了火箭的稳定,我们就要做这么两件事:提高重心和降低压心。
买了一些试剂。。。
苯萘蒽菲
15年9个月前
回复于
化学
内容:遇水不稳定放出SO2的
KC908频谱仪内测版软件缺陷收集
gjgh
4年4个月前
回复于
仪器仪表
内容:稳定重现:在接收机模式中,频率调到200-210MHz,无法改变step到1M,使用“Custom”档则会不保留参数直接重启固件:1.1.0
一天干一点,消磨无聊的生命。2通道干涉仪测向机。
好酷
8年4个月前
回复于
无线电
内容:延时稳定性与me无关。
由美国天文村的联想(转自牧夫论坛)
模型爱好者1
11年11个月前
回复于
天文与空间科学
内容:只一条,那时没有稳定的生存环境,仁人志士依然辈出加油~!
生命是什么?E.薛定谔
SdtEE
5年3个月前
回复于
生物学
内容:遗传物质则不是,但遗传物质本身是高度稳定(可靠)的。,第四章介绍了分子的稳定性(即化学键的稳定性)是一种量子效应,只有达到一定阈值的能量才能破坏分子。,第五章作者试图用第四章介绍的分子稳定性的量子理论来解释遗传物质的稳定性和突变:自然选择使得遗传物质恰好有这样的稳定性,即既可以被概率极小的热运动产生的大能量事件所破坏而产生突变,但又不至于太过频繁而影响种群的延续,这样量子理论就和遗传与突变通过分子的稳定性搭上钩了。
【求助】关于火箭的尾翼设计
Ma3.02的守望
7年11个月前
回复于
喷气推进
内容:“火箭稳定翼的翼展不宜超过箭体直径的两倍”“我的火箭直径定为44mm,所以直角梯形(或直角三角形)稳定翼的高要小于22mm”的确翼展定义指的是两翼尖间距,但总觉得书上的翼展说的是单片尾翼的翼根到翼尖的间距
看了93的多普勒测速系统,想到一个测火箭速度的方法
wacke
13年4个月前
回复于
喷气推进
内容:我的方案对箭载本振稳定度是没有特殊要求的。,箭载上晶振的稳定度我觉得要求挺高,温度变化和冲击的影响很难避免。
[求助]如何变换MP3的输出电平?
kkkkkk
19年2个月前
发表于
电子技术
内容:请问怎样将MP3音频输出电压变为9伏稳定输出啊?
想做频率高的DRSSTC
wormtrjan
10年8个月前
发表于
高电压技术
内容:想做1Mhz-1.5Mhz的DRSSTC,请问steve的驱动在这个频率下能稳定工作吗?
失败的自激全桥
金坷居士
9年4个月前
回复于
电气电工
内容:自激全桥的启动比较难 因为有一个悬浮的管子需要同时启动自激半桥能做的很不错了 600w是可以的 很稳定的
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