xt
发帖数: 17532 | 1
美国已经决定用老毛子的火箭上天了，NASA终于成功outsource,
我认为火箭上应该安装1800-GO-SPACE，这样宇航员可以在任何时间
接通班加罗尔寻求客户支持和技术服务，还可以顺便买保险，orbit
side assistance, mail in rebate等等 |
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t*******r
发帖数: 22634 | 2 http://en.wikipedia.org/wiki/Space_Shuttle_Columbia_disaster#Co
右边第一张图下面的节选：
".. The Columbia Reconstruction Project Team attempted to reconstruct
the bottom of the orbiter as part of the investigation into the accident."
当然，你大可以说老美太他妈笨了，就他妈的为了放个盒子啥的，居然为此建立个
啥子 Project Team。我看找几个 HomeDepot 门口的老墨就成，省多少钱啊。
右边第二张图下面的节选：
"A mock-up of a space shuttle leading edge made with an RCC-panel
taken from Discovery. Simulation of known and possible conditions
of the foam impact on Columbia's final launch sho... 阅读全帖 |
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t******t
发帖数: 15246 | 3 GIOVE-A 2005年由联盟火箭发射
GIOVE-B 2008年由联盟火箭发射
第二阶段的在轨验证星（“In-Orbit Validation (IOV) satellites”）计划发射四颗
，分作两组。首对将于2011年下半年发射。
第三阶段就是正式布网的全功能星（Full Operational Capability (FOC) satellites
），第一颗全功能星将于2011年10月20日在库鲁由联盟火箭发射。
天朝北斗已经发射了4+9,13颗卫星了。 |
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c**i
发帖数: 6973 | 4 (1) Construction of China-Myanmar railway could start in December. DPA, Aug
29, 2011.
http://www.monstersandcritics.com/news/business/news
/article_1659676.php/Construction-of-China-Myanmar-railway-could-start-in-
December
Quote:
"'The whole project will take five years and cost about 20 billion US
dollars. China will bear the cost and the agreement will be based on BOT (
build, operate and transfer) for 50 years,' [Myanmar Railway Transportation
Minister] Aung Min told the German Press Agency d... 阅读全帖 |
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w*********g
发帖数: 30882 | 5 笑翻！美国网友（CNN）关于天宫一号的评论，很欢乐呀！ [复制链接]
天宫一号
本帖地址：http://bbs.m4.cn/thread-3210593-1-1.html 转载请注明来自AC四月青年社区
持续翻译中
kissmybums
Congratulations to China! With the basic technology in place, we hope China
can accelerate its space program, and bring down the cost of putting stuff
into orbit and onto the moon. The rest of the world can then hitch a ride on
Chinese space craft at a more affordable price than the current monopoly of
the USA.
恭喜中国！希望中国作为一个基础科技国家加速他们的空间计划，将把东西放到轨道和
月球上的成本降下来。这样其他国家就可以搭个便车，用比... 阅读全帖 |
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d*****t
发帖数: 7903 | 7 应该是sun synchronous orbit,太阳同步轨道，又和地轴有一定夹角，就这么翻译了。
其实一般翻译 太阳同步轨道 就可以了，因为大多数都是倾斜的。 |
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p******u
发帖数: 14642 | 8 http://www.bbc.co.uk/news/world-europe-16326942
Russian satellite debris lands in Cosmonaut Street
Fragments of a Russian satellite that failed to launch properly have landed
in a street named after cosmonauts in a remote Siberian village, reports say.
The Meridian communications satellite failed to reach orbit on Friday.
Parts crashed into the Novosibirsk region of central Siberia and were found
in the Ordynsk district around 100km (60 miles) south of the regional
capital, Novosibirsk.
Resident... 阅读全帖 |
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w****j
发帖数: 5581 | 9 嗯，现在在天上的是在轨测试卫星IOV（in orbit validation satellite),明年全部
IOV到位。全功能卫星FOC (full operational capacibility)还不定啥时候发。 |
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w*********g
发帖数: 30882 | 10 纽约时报：美国人如何输掉了iPhone的工作
四月网 2012-02-06
《纽约时报》1月12日报道，原题：美国人如何输掉了iPhone的工作。以下是文章内容
摘编。
中国河南省2010年招聘会上，富士康科技有限公司的求职者蜂拥而至。
去年二月份，巴拉克•奥巴马在加利福尼亚参加矽谷名人们的晚宴，每个客人都
得到了一个向总统提问的机会。
但当斯蒂夫•乔布斯准备发问时，奥巴马总统打断了他，先提出了自己的一个问
题：怎样才能在美国生产iPhone？
不久之前，苹果还在吹嘘它的产品都是在美国生产的，今天事情已经完全不是这样了。
苹果公司去年卖出的7000万部iPhone、3000万部iPad和5900万部其他产品，几乎全是在
海外生产的。
奥巴马问，为什么不能把这些工作搬到家里来做？
乔布斯先生的回答含糊其辞，据参加宴会的人员回忆，他说：“这些工作回不来了。”
总统的发问触及了苹果公司的核心问题所在，这已经不仅仅是海外廉价劳动力的问题了
。苹果高层认为，海外工厂的规模、工人的灵活性、勤奋程度和操作技巧都已经超过了
美国工人。“美国制造”已经不是大部分苹果产品的明智选择... 阅读全帖 |
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d*******1
发帖数: 2253 | 11 http://en.wikipedia.org/wiki/File:SCA_approach.ogg
Features which distinguish the two SCAs from standard 747 jetliners are:
-Three struts, with associated interior structural strengthening, protruding
from the top of the fuselage (two aft, one forward) on which the orbiter is
attached
-Two additional vertical stabilizers, one on each end of the standard
horizontal stabilizer, to enhance directional stability
-Removal of all interior furnishings and equipment aft of the forward No. 1
doors
MD is ... 阅读全帖 |
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s****r
发帖数: 31686 | 13 it relies on mars orbiter to relay communication, does not talk directly
with earth
火星探测器到地球的通讯带宽能有多少，能达到1kb/s不？据说这个好奇号的核电池的
发电能力是大约100W，发射能力很有限啊。
★ Sent from iPhone App: iReader Mitbbs Lite 7.56 |
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x****u
发帖数: 12955 | 14
Guess you can't imagine the possibility that the docking orbit was pre
calculated, and can safely bring the two modules into visual range.
Again, your engineering skill is highly in doubt. |
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x****u
发帖数: 12955 | 15
"这说明什么呢？说明月球轨道的对接基本不能依靠地球地面的控制。只能靠轨道舱的雷
达和计算机。可是，这够吗？"
This was your whole point? And you wonder why I question your engineering
skill.
In an airless environment with predictable gravity, the motion of the
ascending module under power is completely predictable by basic Newtonian
physics. It's entire take off and orbit process can be pre-calculated
before the mission gets under way. |
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x****u
发帖数: 12955 | 16
I suggest you read up more on operation of rocket engines before questioning
whether these are variables that affect the operation so much that you need
active correction from ground based control to achieve orbit.
Making a mountain out of a mole hill precisely describes your train of
thought. |
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w*********g
发帖数: 30882 | 17 Un-White America: Will Blacks and Hispanics lead the USA to ruin
http://www.theburningplatform.com/?p=40398
I think ol’ Fred may be on to something here. Does that make me a racist?
========================
I begin to weary of the endless denunciations of “white privilege;” the
calls to end the dominance of malignant white men; the law suits to abolish
all tests on which white men excel, meaning almost any test of mental
ability; to make universities and police forces and advanced-placement
clas... 阅读全帖 |
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H*********S
发帖数: 22772 | 18 看了一下你的链接，一种美国式的春秋笔法
NASA决策层harpold告诉hale的话可以说明一切（这段话跟其他版本没有差别）
You know there is nothing we can do about damage to the (thermal protection
system)
If it has been damaged, it's probably better not to know. I think the crew
would rather not know. Don't you think it would be better for them to have a
happy successful flight and die unexpectedly during entry than to stay on
orbit, knowing that there was nothing to be done until the air ran out. |
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H*********S
发帖数: 22772 | 19 "You know there is nothing we can do about damage to the (thermal protection
system)," Hale quotes Harpold a decade later. "If it has been damaged, it's
probably better not to know. I think the crew would rather not know. Don't
you think it would be better for them to have a happy successful flight and
die unexpectedly during entry than to stay on orbit, knowing that there was
nothing to be done until the air ran out."
把上面那段话给你信得过的native speakers看看，问他们under what circumstances
才会说出那样的话 |
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g**1
发帖数: 10330 | 20 Aegis Missile Defense System Intercepts Target in Test
American Forces Press Service
WASHINGTON, Feb. 13, 2013 – The Missile Defense Agency and sailors aboard
the USS Lake Erie conducted a successful flight test of the Aegis Ballistic
Missile Defense system today, resulting in the intercept of a medium-range
ballistic missile target over the Pacific Ocean by a Standard Missile-3
Block IA guided missile.
At 4:10 a.m. EST, a unitary medium-range ballistic missile target was
launched from the Pacif... 阅读全帖 |
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g**1
发帖数: 10330 | 21 印度總統：今年10月中旬啟動火星任務
2013-02-21 【中央社】
印度總統穆克吉表示，今年將執行第1次火星任務。據報導，10月中旬啟動任務
後，探測器明年9月進入火星軌道。
總理曼莫漢去年8月15日發表「獨立日」全國演說時，首度正式提出將執行「火
星軌道探測器任務」（Mars Orbiter Mission）。
國會預算會期今天開議。去年7月就任的穆克吉（Pranab Mukherjee）首度以國
家元首身分在國會演說時提到，「2013年計劃執行多個太空任務，包括印度第1次的火
星任務並發射第1個導航衛星」。
媒體先前報導，印度的火星軌道探測器預定10月中旬從南印安德拉省斯利哈里柯
塔（Sriharikota）島升空。美國、俄羅斯、歐洲、中國大陸和日本已執行過類似任務。
「印度新聞信託社」（Press Trust of India）今天報導，探測器將由「極軌衛
星運載火箭」（Polar Satellite Launch Vehicle, PSLV）搭載升空，預定經300天飛
行後，明年9月進入火星軌道。
就職前曾任財政部... 阅读全帖 |
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d**********i
发帖数: 4877 | 22 US stealth bomber as messenger: what it says to China, North Korea
The Pentagon sent its distinctive bat-wing-shaped B-2 stealth bombers flying
low over the Korean Peninsula this week – dropping munitions over a remote
South Korean island – in what US military officials initially described as
a routine training exercise.
But the B-2 bomber runs – along with the US military’s unusually frank
announcement of this fact – were designed to send a far more pointed
warning to North Korea, and more prec... 阅读全帖 |
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t****x
发帖数: 9441 | 23 美帝这次真生气了，反应那个快，吼吼！
=============
Published on May 15, 2013
An American Atlas V rocket in the most basic 401 configuration successfully
launched the GPS IIF-4 satellite into orbit today, May 15th 2013 at 21:38
UTC from Cape Canaveral.
The GPS IIF-4 satellite is the fourth of the second block of satellites that
provide locational data for users on Earth. |
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g**1
发帖数: 10330 | 24 ISRO calls off GSLV launch after fuel leak
M. DINESH VARMA
http://www.thehindu.com/news/national/isro-calls-off-gslv-launc
The Indian Space Research Organisation (ISRO) will now go back to the
drawing board to plug imperfections in its indigenous cryogenic upper-stage
Geosynchronous Satellite Launch Vehicle (GSLV) programme, after the GSLV-D5
mission to launch into orbit the advanced communication satellite GSAT-14,
was aborted due to a fuel leak on Monday.
The mission was called off at a fairly... 阅读全帖 |
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b*******y
发帖数: 4304 | 25 How Do We Know When Voyager Reaches Interstellar Space?
Sept 12, 2013
Artist's concept of Voyager's distances
You Are Here, Voyager: This artist's concept puts huge solar system
distances in perspective. The scale bar is measured in astronomical units (
AU), with each set distance beyond 1 AU representing 10 times the previous
distance. Each AU is equal to the distance from the sun to the Earth. It
took from 1977 to 2013 for Voyager 1 to reach the edge of interstellar space.
Image Credit: NASA/J... 阅读全帖 |
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m*****6
发帖数: 604 | 26 火星气候探测者号（Mars Climate Orbiter）是美国国家航空航天局的火星探测卫星，
也是火星探测98计划的一部份，于1999年发射。火星极地着陆者号为另一个探测火星的
任务。不过火星气候探测者号后来在进入火星轨道的过程中失去联络，任务失败。
火星气候探测者号上的飞行系统软件使用公制单位牛顿计算推进器动力，而地面人员输
入的方向校正量和推进器参数则使用英制单位磅力。这个因计量单位混淆的错误在此后
的所有任务中被NASA小心地避免。 |
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d*********o
发帖数: 6388 | 27 http://www.voachinese.com/content/indian-orbit-tridders-space-r
印度太空研究组织将在近期发射火星探测器，准备工作即将就绪。此举有可能在亚洲引
起一场太空竞赛。
这艘探测器的任务包括收集有关火星大气和地表的科学数据。
发射时间本来定于本月28日，但是由于太平洋上空的天气状况不佳，发射时间已经推迟
一个星期。
如果发射成功的话，印度太空研究组织将是成功地将探测器飞行到火星的第四家机构。
前三家是美国、欧盟和俄罗斯。
英国广播公司援引印度新德里电视台科学部编辑巴格拉的话说，“如果印度在火星探测
方面胜过中国，你可以想象到这是多大的民族骄傲。”
印度的太空活动已经进行了大约30年。以前的太空技术活动基本上是利用卫星改进贫穷
人口的通讯条件以及环境监测。但是，在2008年，印度把制造和发射卫星的技术转向太
空探索，并且向月球发射了探测器。
2011年，中国向火星发射银河一号探测器的计划由于技术问题而叫停。据报道，印度于
是快马加鞭进行发射火星探测器的计划，仅仅一年零几个月的时间就基本准备就绪。
不过，中国也没停着。中国国家宇航局计划... 阅读全帖 |
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w*********g
发帖数: 30882 | 28 6月15日，中国成功发射了实践12号试验卫星。根据北美防空司令部的轨道数据，实践
12号卫星升空后通过一系列机动，于8月20日凌晨与实践6号03A卫星发生了“碰撞”。
这说明中国成功进行了一次空间交汇对接试验，为明年天宫一号与神州八号的交汇对接
任务做好技术验证准备。
今年6月15日，我国在酒泉发射中心使用长征二号丁运载火箭成功发射了实践十二号（
SJ-12）试验卫星。实践系列卫星在历史上一直承担着空间科学试验和卫星新技术试验
的任务。对于实践十二号卫星的用途，新华社在发射成功后报道，“实践十二号卫星是
由中国航天科技集团公司所属上海航天技术研究院为主研制。卫星主要用于开展空间环
境探测、星间测量和通信等科学与技术实验。”无独有偶，当天还有一次航天发射，俄
罗斯第聂伯运载火箭将用于低成本编队飞行与交会技术验证的瑞典Prisma卫星发射升空。
俄航天爱好者发现两颗中国卫星发生“碰撞”
众所周知，我国在航天方面的信息公开不多，虽然航天发射已经全面公开，但是在轨卫
星的情况，很多时候都要靠外国媒体来了解。实践十二号卫星发射后，从北美防空司令
部发布的轨道TLE数据来看（Two-Line Or... 阅读全帖 |
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T**********e
发帖数: 29576 | 29
这个案子小黑判了终身，大白天城里街上小黑对70-80岁亚裔夫妇练拳击，打完老头打
老太。
Elex Murphy Sentenced for Brutal Dutchtown Attack
In April 2011, a morning walk home from the market turned deadly for one
Dutchtown couple. As a 59 year-old woman and her 72 year- old husband headed
up the alley in broad daylight, they were approached by four people they
did not know. Suddenly, Elex Murphy grabbed the husband's jacket and punched
him in the head. The elderly man fell to the ground.
The ruthless attack didn't end there. Elex Murphy t... 阅读全帖 |
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d**********r
发帖数: 24123 | 31 The Federation
Officially the Federation of the Americas (Spanish: Federación de las Amé
ricas), is a political, economic, and military union of North American,
Central American, South American, and Caribbean nations (Latin America),
that has risen to power in the alternate timeline. The Federation's capital
is Caracas, Venezuela.
Under the leadership of the strongly anti-American General Diego Almagro,
the Federation spread unchecked throughout the rest of South America. As
Almagro intensified ... 阅读全帖 |
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g**1
发帖数: 10330 | 32 http://www.esa.int/Our_Activities/Operations/Helping_China_to_t
Helping China to the moon
29 November 2013
Shortly after China’s Chang’e-3 spacecraft departs Earth to land on the
Moon, ESA’s network of tracking stations will swing into action, providing
crucial support for the vessel’s five-day lunar cruise.
China’s Chang’e-3, named after the mythological goddess of the Moon, is
scheduled for lift off on 1 December from the Xichang launch base in China’
s Sichuan province on a journey to deposit... 阅读全帖 |
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d****o
发帖数: 32610 | 33 第三次变轨烧了10分钟才把远地点升高到71636km，
这次烧了20分钟就从地球椭圆轨道进到地火转移轨道了？
不对太啊
我算了一下进转移轨道需要的能量比前面所有变轨加起来还要多一半呢
http://en.wikipedia.org/wiki/Mars_Orbiter_Mission
8 November 2013 20:40 UTC Orbit-raising manoeuvres Burn time: 707 sec
Apogee: 40,186 km to 71,636 km
30 November 2013, 19:19 UTC Trans-Mars Injection Burn time: 1328.89
sec Successful |
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l******j
发帖数: 1728 | 34 有这时间硬拗，不如花点时间看看真实数据：
http://www.isro.org/mars/spacecraft.aspx
Lift-off Mass 1337 kg
Structures Aluminum and Composite Fiber Reinforced Plastic (CFRP)
sandwich construction-
modified I-1 K Bus
Mechanism Solar Panel Drive Mechanism (SPDM), Reflector & Solar panel
deployment
Propulsion Bi propellant system (MMH + N2O4) with additional safety and
redundancy features for MOI. Proplellant mass:852 kg
Thermal System Passive thermal control system
Power System Single Solar Array-... 阅读全帖 |
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Y******u
发帖数: 1912 | 35 http://en.wikipedia.org/wiki/Moon_landing_conspiracy_theories
Since the late 2000s, high-definition photos taken by the Lunar
Reconnaissance Orbiter (LRO) of the Apollo landing sites have captured the
lander modules and the tracks left by the astronauts.[4][5] In 2012, images
were released showing the Apollo flags still standing on the Moon.[6][7] |
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m*****5
发帖数: 23482 | 36 A review of photographs taken by the Lunar Reconnaissance Orbiter Camera (
LROC) indicates that flags placed during the Apollo 12, Apollo 16, and
Apollo 17 missions were still standing as of 2012.[2] The flag for the
Apollo 11 mission was blown over by the rocket blast during lift-off.[2] It
is believed that the colors on the flags have turned white due to sunlight
and space radiation.[3] |
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s*****V
发帖数: 21731 | 37 http://i.space.com/images/i/000/015/157/i02/earth-moon-lagrange-points.jpg?1328752769
【搜狐科学消息】据国外媒体报道，美国宇航局计划在地球和月球的拉格朗日点（地-
月L2）上建设空间站。地-月L2处于地球和月球连线的延长线上，距离月球65000公里。
由于处于该点的航天器还要受到太阳引力的干扰，实际运行轨迹非常复杂，形成了围绕
地-月L2的晕轨道（halo orbit）。
处于地-月L2上的空间站能够为宇航员和工程师积累深空操作的经验，最终会确保
人类脱离地月系统而探索更为广阔的宇宙空间。地-月L2上的空间站还能够作为维修大
型天文望远镜的平台，并且由于地-月L2距离月球较近，因此还可以用来对月球上的地
质勘探机器人进行实时遥控。
在月面上投放和远程遥控机器人比让宇航员登陆更安全和节约成本。机器人能够在
月球上工作数年，就像在火星上工作的火星车一样。人类可以利用远程遥控的机器人建
立月球基地，为21世纪第一批登陆月球的宇航员做好前期准备（1972年12月，阿波罗17
号飞船是整个阿波罗登月计划中最后一... 阅读全帖 |
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p********7
发帖数: 18007 | 38 Armstrong is generally referred to as a "reluctant" American Hero. John
Glenn, the first American to orbit Earth, recalled Armstrong’s legendary
humility. “He didn’t feel that he should be out huckstering himself,” the
former Ohio senator told CNN.[124] “He was a humble person, and that’s
the way he remained after his lunar flight, as well as before.” |
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s*****V
发帖数: 21731 | 39 http://usatoday30.usatoday.com/news/opinion/forum/2011-05-24-Ob
Armstrong clarified this point with an example: "For Mission Control on
Earth to play an important and timely role in flight operations," with Moon
travelers "communication delays with Earth are less than two seconds." By
contrast, "Mission Control cannot provide a Mars crew their normal helpful
advice if ... the time delay of radar, communications and telemetry back to
Earth is 19 minutes.... Flight experience at lunar distance can... 阅读全帖 |
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z******i
发帖数: 986 | 41 我发现你屁都不懂，就一打餐馆的能耐，还在这里厚着脸皮大言不惭，不知害羞的评价
航天飞机技术问题？ 说实话，我估计你的智商也就小学二年级的水平。
航天飞机 a system of reusable spacecraft，或者称 space shuttle, 只所以飞近地
规道，low Earth orbit， 不是它自身包含的技术成分所决定的。而是它的设计目的就
是到同步运行的那个轨道去往返做它该做的事情，并不是它不可以飞到与月球平行的轨
道，而是飞到那里不符合它的目的，也不是它的目标。
航天飞机上天，不是它自己本身动力开上去的，而是绑在火箭肚子上让火箭把它推上去
的。要把它推到近地轨道或者其它设计好的轨道，取决于人们对它赋予的任务和目的以
及用于推动它的火箭的推力而已。从理论上讲，它既然可以被推到近地轨道，当然没有
任何技术难度可以被推到其它地球轨道。
也就说，航天飞机去什么轨道是运载它上天的火箭推力决定的，不是它自己决定的。
当然了，航天飞机的技术难度在于穿过大气层时的考验，而不是被推到外太空的轨道选
择。举个简单的例子就是，如果你脸皮的厚度和结实程度以及全身能忍受了高速大气物
理摩... 阅读全帖 |
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t********t
发帖数: 1070 | 42 这就是美国的傻逼科学家，虽然没有任何科学依据，可大嘴一张，什么屁都敢放。
1. 落月前，美国科学家关于嫦娥3落月对月球外层大气影响的断言：
November 21, 2013
Significant contamination
"The arrival of the Chang'e 3 spacecraft into lunar orbit and then its
descent to the surface will result in a significant contamination of the
lunar exosphere by the propellant," saidJeff Plescia, a space scientist at
Johns Hopkins University's Applied Physics Laboratory in Laurel, Md. Plescia
also chairs NASA's Lunar Exploration Analysis
而实际结果是：
Surprisingly, the LADEE science team... 阅读全帖 |
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x******g
发帖数: 33885 | 44 不得了啦！三哥v5！
会不会抢先在邓产党之前把人送上去？
After Mars mission, India plans manned moon mission
New Delhi, December 27, 2013
The Indian Space Research Organisation (ISRO) and the Ministry of Defence (
MoD) have signed a Memorandum of Understanding (MoU) for a manned moon
mission, sources told Headlines Today on Friday.
The mission comes days after ISRO successfully launched Rs.450 crore Mars
Orbiter Mission (MOM) in November using its Polar Satellite Launch Vehicle (
PSLV-XL).
According to sources, the MoD has... 阅读全帖 |
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w****2
发帖数: 12072 | 45 space x 是怎么回事 [ 红绿 ] 于:2012-06-01 23:34:42 主题帖
首先，spacex是不是一家私人公司？ 这个毫无疑问，是。但也没这么简单。公司存在
差不多十年了，Musk投入了大约1亿美元的个人资产。其他的投资基金，私人资产加起
来也有差不多1亿。十年的总运营费用大概是10亿。这钱大部分来自美国宇航局（NASA)
的项目基金5亿美元。这五亿可不是普通意义上的服务费用。其中的最重要的2到3亿是
NASA给spacex的种子基金，这个种子基金通过COTS（Commercial Orbital
Transportation Services）项目给的。这个项目很有意思，它不是普通的合同，
spacex拿到钱，如果做不出东西，它也无需承担任何合同的责任（不过，nasa需要看到
一些私人资金的投入意愿）。天下还有如此好事？是的。spacex还不是第一个尝鲜的人
。spacex的前辈公司就拿了几千万美元的这个钱，但因为据说nasa看不到诚意，截断了
剩下的接近2亿美元投入，转而找其他人去了。spacex迅速加入战团，拿到订单。这钱
太重要了，spacex早期弄的Fal... 阅读全帖 |
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T**********e
发帖数: 29576 | 47
spacex一个2002年成立的小公司，造的回收式载人飞船Dragon由自造的火箭falcon 9发
射成功了， 还对接到ISS上， 不是盖的。
During its uncrewed maiden flight in December 2010, Dragon became the first
commercially built and operated spacecraft to be recovered successfully from
orbit.On 25 May 2012, an uncrewed variant of Dragon became the first
commercial spacecraft to successfully rendezvous with and be attached to the
International Space Station (ISS). |
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T**********e
发帖数: 29576 | 48 5千万的一次发射，燃料才20万，成本都在火箭上用一次就扔了。
Musk以前计划宇航成本大幅降低以后在火星建立殖民地，飞船票一人50万刀，估计一大
堆人抢着去。看新闻火星殖民项目的训练营已经上千人交钱报名了， 有钱不要命的主
真不少。
SpaceX believes a fully and rapidly reusable rocket is the pivotal
breakthrough needed to substantially reduce the cost of space access. SpaceX
’s Falcon 9 rocket currently carries a list price of about $54 million.
However, the cost of fuel for each flight is only around $200,000—about 0.4
% of the total. The majority of the launch cost comes from building the
rocket, which flies... 阅读全帖 |
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T**********e
发帖数: 29576 | 49 5千万的一次发射，燃料才20万，成本都在火箭上用一次就扔了。
SpaceX believes a fully and rapidly reusable rocket is the pivotal
breakthrough needed to substantially reduce the cost of space access. SpaceX
’s Falcon 9 rocket currently carries a list price of about $54 million.
However, the cost of fuel for each flight is only around $200,000—about 0.4
% of the total. The majority of the launch cost comes from building the
rocket, which flies only once. Compare that to a commercial airliner. Each
new plane costs about the same... 阅读全帖 |
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T**********e
发帖数: 29576 | 50
nasa造火箭用的那些contractor都太贵了，shuttle一个出发点是降低成本，但是越搞
越贵。spacex的现在路子是主要自造，有的直接拿nasa的技术自己造。
Significantly, the Merlin engines—like roughly 80 percent of the components
for Falcon and Dragon, including even the flight computers—are made in-
house. That’s something SpaceX didn’t originally set out to do, but was
driven to by suppliers’ high prices. Mueller recalls asking a vendor for an
estimate on a particular engine valve. “They came back [requesting] like a
year and a half in development and hundred... 阅读全帖 |
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