U***t
发帖数: 98 | 1 你说的是对的，fuselage的（in-plane)shear buckling是个很重要的一个设计要求，
以前有过B707（可能有误）fuselage的shear failure例子，飞机倒是降落了，
不过成了敞篷飞机，吹走了几个乘客，呵呵。Diameter大的fuselage应该
更容易buckling(with identical shell thickness),所以需要增强,这又导致
重量的大幅增加，所以可能会导致结构的重新设计，难度也因此而增高。
其实doubledeck的设计是很聪明的，因为增加的deck的重量可以另一方面增强fuselage
的刚性，一石二鸟啊。。。 |
|
k*****a
发帖数: 1518 | 2 【 以下文字转载自 BUAA 讨论区 】
【 原文由 Uboat 所发表 】
你说的是对的，fuselage的（in-plane)shear buckling是个很重要的一个设计要求，
以前有过B707（可能有误）fuselage的shear failure例子，飞机倒是降落了，
不过成了敞篷飞机，吹走了几个乘客，呵呵。Diameter大的fuselage应该
更容易buckling(with identical shell thickness),所以需要增强,这又导致
重量的大幅增加，所以可能会导致结构的重新设计，难度也因此而增高。
其实doubledeck的设计是很聪明的，因为增加的deck的重量可以另一方面增强fuselage
的刚性，一石二鸟啊。。。 |
|
d*********e
发帖数: 3835 | 3
(Aviation Business, 3/29/2010, N/A)
Construction of the facility that will build the fuselage for the all-
new Bombardier CSeries mainline commercial jetliner has begun.
The event - another milestone in Bombardier's progress toward a 2013 entry-
into-service for the CSeries aircraft - was marked with a foundation stone-
laying ceremony last week at the site in Shenyang, China.
The 21,000 m2 facility will be operated by Shenyang Aircraft Corporation (
SAC), a subsidiary |
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b*********3
发帖数: 1709 | 4 Boeing abandons its failed fuselage robots on the 777X, handing the job back
to machinists
https://www.seattletimes.com/business/boeing-aerospace/boeing-abandons-its-
failed-fuselage-robots-on-the-777x-handing-the-job-back-to-machinists/
After enduring a manufacturing mess that spanned six years and cost millions
of dollars as it implemented a large-scale robotic system for automated
assembly of the 777 fuselage, Boeing has abandoned the robots and will go
back to relying more on its human machi... 阅读全帖 |
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d****o
发帖数: 32610 | 5 不是鬼子干的就是意呆利干的
轴心国家亡美帝之心不死
Japan
For 787 production, Boeing's three main Japanese partners are building new
plants or expanding existing ones around the industrial city of Nagoya, two
hours southwest of Tokyo by bullet train.
Kawasaki Heavy Industries builds the short fuselage section in front of the
wing. It also supplies the fixed trailing edge of the wing and sends it to
the Mitsubishi plant.
Fuji Heavy Industries builds the center wing box, the heavily reinforced
structure in the lower half o... 阅读全帖 |
|
w*********g
发帖数: 30882 | 6 澳大利亚航空专业人士对丝带图片的评论，感觉是目前为止最实在最客观的zt
来源: awzh 于 2010-12-29 11:35:08 [档案] [博客] 旧帖] [转至博客] [给我悄悄话
] 本文已被阅读：0次 字体：调大/调小/重置 | 加入书签 | 打印 | 所有跟帖 | 加跟
贴 | 查看当前最热讨论主题 Australia Air Power on J-20
Dr Carlo Kopp
Over the last few days imagery of what is claimed to be China's new stealth
fighter has appeared on a range of Chinese Internet sites. There have been
no official disclosures as yet, so many of the claims appearing in the media
may only be speculation presented as fact.
在过去几天里被称为是中国的新型隐身战机的图片在大批中国军事... 阅读全帖 |
|
v**e
发帖数: 8422 | 7 全文照翻：澳大利亚航空专业人士对丝带图片的评论，感觉是目前为止最实在最客观的
送交者: stdlxz13 2010年12月29日
Australia Air Power on J-20
Dr Carlo Kopp
Over the last few days imagery of what is claimed to be China's new stealth
fighter has appeared on a range
of Chinese Internet sites. There have been no official disclosures as yet,
so many of the claims appearing in
the media may only be speculation presented as fact.
在过去几天里被称为是中国的新型隐身战机的图片在大批中国军事网站上出现。现在还
没有官泄，所以很多细节大家其
实都是在YY。（不过作者基本默认不是PS)
The aircraft may be a technology demonstrator ... 阅读全帖 |
|
d******r
发帖数: 16947 | 8 Sometimes the terms "longeron" and "stringer" are used interchangeably.
Historically, though, there is a subtle difference between the two terms. If
the longitudinal members in a fuselage are few in number and run all along
the fuselage length (usually 4 to 8), then they are called "longerons". The
longeron system also requires that the fuselage frames be closely spaced (
about every 4 to 6 in or 10 to 15 cm). If the longitudinal members are
numerous (usually 50 to 100) and are placed just betwe... 阅读全帖 |
|
|
k******a
发帖数: 2436 | 10 Many aviation experts believe that the J-20 relies on a pair of Russian
engines or their Chinese copies. In other words, the J-20’s engines are
picked out among members of the big family uniting the Item
117, AL-31F, WS-14 and WS-10 Taihang. Two engines together develop in
between 30 and 40 tons of thrust. If that is so, then the capability of the
propulsion system
Aircraf t
is enough for supercruise, or supersonic cruise flight at military power (
highest pow- er setting without afterburning). ... 阅读全帖 |
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b*******y
发帖数: 4304 | 11 By wiki:
The vortex lift effect is increased by extensions of the leading edge at the
wing root (the juncture with the fuselage) known as a strake. Strakes act
as an additional elongated, short-span, triangular wing running from the
actual wing root to a point further forward on the fuselage. Blended into
the fuselage and along the wing root, the strake generates a high-speed
vortex that remains attached to the top of the wing as the angle of attack
increases, |
|
a******o
发帖数: 16625 | 12 川崎重工，富士重工，三菱重工
For 787 production, Boeing's three main Japanese partners are building new
plants or expanding existing ones around the industrial city of Nagoya, two
hours southwest of Tokyo by bullet train.
Kawasaki Heavy Industries builds the short fuselage section in front of the
wing. It also supplies the fixed trailing edge of the wing and sends it to
the Mitsubishi plant.
Fuji Heavy Industries builds the center wing box, the heavily reinforced
structure in the lower half of the central fus... 阅读全帖 |
|
w*********g
发帖数: 30882 | 13 Chinese Smuggler Tried to Sneak Carbon Fiber for Fighter Jets, Feds Claim
By Robert BeckhusenEmail AuthorSeptember 28, 2012 | 6:30 am | Categories:
Spies, Secrecy and Surveillance
Exporting aerospace-grade carbon fiber isn’t easy, as it can be used to
build military planes like the F-22 Raptor. Photo: Air Force
The U.S. has busted up a plot to smuggle tons of carbon fiber to China,
where the material would ostensibly be used in the construction of new
fighter planes. That might seem worrying, bu... 阅读全帖 |
|
g**8
发帖数: 4951 | 14 中方曾经要求波音在北京奥运之前交货， 你说的试航证问题，那个时候存在吗
？也就是说你说的试航证问题确切吗？
而我可以给出刚刚在网上找到的多条当时中方要求北京奥运之前交货而波音没有交货的
网上新闻出处。
我在网上看到的787供应商和承包商名单里面，没有看到任何中国公司。
http://en.wikipedia.org/wiki/Boeing_787_Dreamliner
Manufacturing and suppliers
After stiff competition, Boeing announced on December 16, 2003, that the 787
would be assembled in its factory in Everett, Washington.[4] Instead of
building the complete aircraft from the ground up in the traditional manner,
final assembly would employ just 800 to 1,200 people to join... 阅读全帖 |
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g**8
发帖数: 4951 | 15 首先，我的那个贴里我的观点是美国不让中国参与，而不是中国不想参与。
其次，你给出的这个波音自己的中文官网上，他们大字说明了关键词：“非可见部分”
： 垂直尾翼后缘面板－－ 天津波音复合材料有些公司
注意是其中使用的材料。可以使用在包括波音787在内的多种波音飞机上。而这个波音
中文官网上实在找不出别的内容了的拿材料说事的忽悠中国人的做法，我说实话，如果
我们认真就自作多情了。
另外说到底，那还是波音中国的独资公司，而网上具体给出的波音787成品组件供应商
里，确实没有任何中国公司.
还有, 为什么美国不给ARJ21适航证，不是防着中国吗？
最后，中方曾经要求波音在北京奥运之前交货， 你说的试航证问题，那个时候存在吗
？也就是说你说的试航证问题确切吗？
而我可以给出刚刚在网上找到的多条当时中方要求北京奥运之前交货而波音没有交货的
网上新闻出处。
－－－－
我在网上看到的787供应商和承包商名单里面，没有看到任何中国公司。
http://en.wikipedia.org/wiki/Boeing_787_Dreamliner
Manufacturing and suppliers
After... 阅读全帖 |
|
h***o
发帖数: 6 | 16 看了很多以前飞机的case, 觉得是这样的。
2012 在上海浦东飞机场 MH370和另一架飞机 机翼相撞， resulting in the right
wing-tip being severely damaged. Although the damage was repaired, the crash
caused stress in the connection between the wing and the fuselage. After
two years of flying, the repeated stress has finally led to structural
failure of the connection between the right wing and the fuselage, leading
to
an explosive decompression of the cabin in the mid-air, causing an immediate
disintegration of the airplane, hence no time ... 阅读全帖 |
|
W***n
发帖数: 11530 | 17 Southwest Sends Oldest 737s to Graveyard as Max Joins Fleet
By Mary Schlangenstein
September 29, 2017, 4:00 AM CDT September 29, 2017, 12:35 PM CDT
Aircraft shift to happen as 30 Classics head to desert storage
Bigger Max burns less fuel and can fly farther than -300s
Southwest Airlines Co. is set to pull off an aviation high-wire act this
weekend as it sends 30 of its oldest planes to a desert graveyard just 24
hours before launching the newest version of its staple 737 jetliner.
The changeover... 阅读全帖 |
|
F*********u
发帖数: 12190 | 18 机体(fuselage)破了，没进入乘客舱而已
A 5-inch by 16-inch hole was found in the left fuselage just above the left
wing
不只是个坑 |
|
|
b*********3
发帖数: 1709 | 20 Boeing Shares Slide On Reports 777 Fuselage "Split Dramatically" During
Stress Test
Yep. Another example of what happens when you try to replace union labor and
another example of vaunted German engineering failure. Of course none of
the management who made these decisions will be held accountable.
https://www.seattletimes.com/business/boeing-aerospace/boeing-abandons-its-
failed-fuselage-robots-on-the-777x-handing-the-job-back-to-machinists/ |
|
d*****l
发帖数: 8441 | 21 First, to achieve smooth airflow with desirable
parameters at the entry to the engine’
s fan, the J-20’s designers have to
make the air intakes rather long. This was
an important consideration at design stage.
Second, they also needed to make
the air channel S-shaped, so as to hide
the fan blades from the radio waves emitted
by enemy radars. The latter is needed
for a lower visibility of the airplane. It
is worth to notice that the J-20’s air intakes
resemble those first tried on the Lockheed
Ma... 阅读全帖 |
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k******a
发帖数: 2436 | 22 Let’s take a look at other available pho- tos, in which the J-20 goes in
for the land- ing with landing gear down. Apparent- ly, the canards are set
at a rather high pos- itive angle (leading edge upwards), while the wing has
its leading edge deflected downwards. The trailing edge surfaces are also
deflected down, at rather a small an- gle. Obviously, at the approach for
land- ing configuration, the wing’s center line
is highly curved by means of the leading and training edges down, which
increa... 阅读全帖 |
|
k******a
发帖数: 2436 | 23 The J-10 is a classic design with “prop- er” positioning of the center of
gravity, like in the books. This is clear to tell looking at the main
landing gear struts attached to the fuselage somewhere near 15–30% of the
wing’s MAC. So, let us ask ourselves the same question again, why the
Chinese designers shaped the J-20 in the way it is?
Here are some suggestions.
First, to achieve smooth airflow with de- sirable parameters at the entry to
the en- gine’s fan, the J-20’s designers have to make th... 阅读全帖 |
|
w*********g
发帖数: 30882 | 24 【 以下文字转载自 Military 讨论区 】
发信人: wayofflying (小破熊), 信区: Military
标 题: 看来兔子的四代让美国抓狂了 FBI到处乱抓科技WSN
发信站: BBS 未名空间站 (Mon Nov 12 13:16:00 2012, 美东)
Chinese Smuggler Tried to Sneak Carbon Fiber for Fighter Jets, Feds Claim
By Robert BeckhusenEmail AuthorSeptember 28, 2012 | 6:30 am | Categories:
Spies, Secrecy and Surveillance
Exporting aerospace-grade carbon fiber isn’t easy, as it can be used to
build military planes like the F-22 Raptor. Photo: Air Force
The U.S. has busted up a plot to smuggle tons ... 阅读全帖 |
|
w*********g
发帖数: 30882 | 25 【 以下文字转载自 Military 讨论区 】
发信人: wayofflying (小破熊), 信区: Military
标 题: 看来兔子的四代让美国抓狂了 FBI到处乱抓科技WSN
发信站: BBS 未名空间站 (Mon Nov 12 13:16:00 2012, 美东)
Chinese Smuggler Tried to Sneak Carbon Fiber for Fighter Jets, Feds Claim
By Robert BeckhusenEmail AuthorSeptember 28, 2012 | 6:30 am | Categories:
Spies, Secrecy and Surveillance
Exporting aerospace-grade carbon fiber isn’t easy, as it can be used to
build military planes like the F-22 Raptor. Photo: Air Force
The U.S. has busted up a plot to smuggle tons ... 阅读全帖 |
|
f**d
发帖数: 768 | 26 这是一本计算神经科学的优秀著作，全文拷贝这里（图和公式缺），有兴趣的同学可以
阅读
如需要，我可以分享PDF文件（－－仅供个人学习，无商业用途）
From Computer to Brain
William W. Lytton
From Computer to Brain
Foundations of Computational Neuroscience
Springer
William W. Lytton, M.D.
Associate Professor, State University of New York, Downstato, Brooklyn, NY
Visiting Associate Professor, University of Wisconsin, Madison
Visiting Associate Professor, Polytechnic University, Brooklyn, NY
Staff Neurologist., Kings County Hospital, Brooklyn, NY
In From Computer to Brain: ... 阅读全帖 |
|
z*****a
发帖数: 3809 | 27 这是巧合还是阴谋啊？
President Lech Kaczynski, his wife and some of his top security officials
were among the 96 people killed in the crash. As the fuselage of the
Soviet-made Tupelov airplane (operated by a Polish airliner) still
smoldered in forest near the city of Smolensk, the grim irony of their
deaths became clear to the stunned Polish nation: Their president had been
on his way to Russia to commemorate the massacre of tens of thousands of
Poles, who had been executed on the order of Soviet dictator |
|
M*****8
发帖数: 17722 | 28 隐形技术的血泪源头。（ZT）
The tearful origins of China's stealth
By Peter Lee
The recent test flight of China's J-20 stealth fighter has occasioned
certain uproar in international security circles, as well as paroxysms of
joy among China's more nationalistic netizens.
Despite no hard information on its stealthiness or its capabilities beyond
the fact that it was able to take off, fly for 15 minutes, and land, the J-
20 is already serving as justification for heightened concern and its
inevitable adjunct, h... 阅读全帖 |
|
c**i
发帖数: 6973 | 29 Three Aviation Week articles, in chronological order.
(1) Press release, COMAC selects Hamilton Sundstrand to provide C919
electric system. Hamilton Sundstrand, Apr 21, 2011.
http://www.hamiltonsundstrand.com/vgn-ext-templating
-hs/v/index.jsp?vgnextoid=16eaaec96b991110VgnVCM
1000007301000aRCRD&hsct=hs_news&ciid=efffa174d
2228210VgnVCM1000004f62529fRCRD
("Commercial Aviation Corporation of China, Ltd. (COMAC) has selected
Hamilton Sundstrand to provide the electric power generation and
distribut... 阅读全帖 |
|
c**i
发帖数: 6973 | 30 (1) David A. Fulghum, New Chinese Ship-Based Fighter Progresses. Aviation
Week, Apr 27, 2011.
http://www.aviationweek.com/aw/generic/story_generic.jsp?
channel=aerospacedaily&id=news/asd/2011/04/27/02.xml&
headline=New%20Chinese%20Ship-Based%20Fighter%20Progresses
("Analysts and aircraft watchers in China say the aircraft’s first flight
was made on Aug. 31, 2009, powered by a Russian-supplied AL-31. Ukraine is
the source of China’s Su-33/Flanker D, U.S. analysts agree. 'Russia’s
carrier training... 阅读全帖 |
|
c**i
发帖数: 6973 | 31 Saurave Jha, Vietnam, India Boost Naval Ties to Counter China. World
Politics Review, July 29, 2011
http://www.worldpoliticsreview.com/articles
/9630/vietnam-india-boost-naval-ties-to-counter-china
(You will have to google the title to read the article, rather than click the link.)
Quote:
"In a move that had been in the offing for some time, India appears to have
finally greenlighted long-term basing for it ships at Na Thrang * * * The
offer on Na Thrang was reiterated by the Vietnamese Chief of... 阅读全帖 |
|
d*******1
发帖数: 2253 | 32 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 |
|
g**8
发帖数: 4951 | 33 【 以下文字转载自 Travel 讨论区 】
发信人: go88 (旧友重来), 信区: Travel
标 题: 分析一下波音787突然多公司多架次大面积事故的原因
发信站: BBS 未名空间站 (Thu Jan 17 00:59:04 2013, 美东)
最近日本的全日空和日航多架次波音787突然连续出现事故，由此引发日本和美国航空
当局先后下令停飞各自国家所有航空公司的全部波音787飞机。
不知是否因为我是一个硅工（硅谷工程师）而比较喜欢逻辑分析和推理的缘故，反正我
看了那些新闻，先是有不少疑问，然后经过一些分析，居然想到了一些可能的原因。
先说什么疑问：
1）为什么是日本的两个航空公司集中高发遇到问题？
2）波音787各航空公司首飞时间是什么时候，为什么突然现在集中突发问题？
先看几组数据，全部来自波音787的wiki网页：
－－波音787第一架交货是在2011年的9月25日，给日本的全日空的。
－－波音787第一次中短途商业飞行是2011年10月26日全日空的东京羽田机场到香港的
航班。
－－波音787第一次长途商业飞行是2012年1月12日还是全日空，从东京羽田到德国法
兰... 阅读全帖 |
|
f********t
发帖数: 6999 | 34 【 以下文字转载自 SanFrancisco 讨论区 】
发信人: go88 (旧友重来), 信区: SanFrancisco
标 题: 分析一下波音787突然多公司多架次大面积事故的原因 (转载)
发信站: BBS 未名空间站 (Thu Jan 17 01:00:08 2013, 美东)
发信人: go88 (旧友重来), 信区: Travel
标 题: 分析一下波音787突然多公司多架次大面积事故的原因
发信站: BBS 未名空间站 (Thu Jan 17 00:59:04 2013, 美东)
最近日本的全日空和日航多架次波音787突然连续出现事故，由此引发日本和美国航空
当局先后下令停飞各自国家所有航空公司的全部波音787飞机。
不知是否因为我是一个硅工（硅谷工程师）而比较喜欢逻辑分析和论证的缘故，反正我
看了那些新闻，先是有不少疑问，然后经过一些分析，居然想到了一些可能的原因。
先说什么疑问：
1）为什么是日本的两个航空公司集中高发现在的遇到的问题？
2）波音787各航空公司首飞时间是什么时候，为什么突然现在集中突发问题？
先看几组数据，全部来自波音787的wiki网页：
... 阅读全帖 |
|
z****e
发帖数: 54598 | 35 【 以下文字转载自 SanFrancisco 讨论区 】
发信人: go88 (旧友重来), 信区: SanFrancisco
标 题: 分析一下波音787突然多公司多架次大面积事故的原因 (转载)
发信站: BBS 未名空间站 (Thu Jan 17 01:00:08 2013, 美东)
发信人: go88 (旧友重来), 信区: Travel
标 题: 分析一下波音787突然多公司多架次大面积事故的原因
发信站: BBS 未名空间站 (Thu Jan 17 00:59:04 2013, 美东)
最近日本的全日空和日航多架次波音787突然连续出现事故，由此引发日本和美国航空
当局先后下令停飞各自国家所有航空公司的全部波音787飞机。
不知是否因为我是一个硅工（硅谷工程师）而比较喜欢逻辑分析和推理的缘故，反正我
看了那些新闻，先是有不少疑问，然后经过一些分析，居然想到了一些可能的原因。
先说什么疑问：
1）为什么是日本的两个航空公司集中高发遇到问题？
2）波音787各航空公司首飞时间是什么时候，为什么突然现在集中突发问题？
先看几组数据，全部来自波音787的wiki网页：
－－波音... 阅读全帖 |
|
r***e
发帖数: 2000 | 36
That happened several seconds after the perceived 'touchdown'.
Some passengers might actually have unbuckled their seat belts
when they thought they were on the ground already.
Based on the description of Xu Da who was in the last rows,
the initial impact, which snapped the tail off, was not big.
The second impact, when the fuselage shot up, probably threw
the girls outside the airplane. |
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k*****r
发帖数: 21039 | 37 尼玛，777也烧过电池，紧急降落：
The pilots radioed that there was smoke in the cabin, the plane diverted to
Dieppe New Brunswick Canada (CYQM) for an emergency landing, the
plane landed safely. Once the plane came to a halt on the tarmac the
passengers were told to stay seated while emergency crew on the ground
checked the plane. The emergency crew found that the smoke was caused from
overheating of the batteries in the lower fuselage of the aircraft. All
passengers and crew aboard the aircraft were s... 阅读全帖 |
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d**********i
发帖数: 4877 | 38 5th-generation fighter plan hits hurdle as Russia hikes cost - The Times of
India
三哥买的五代鸡也要被宰了。
NEW DELHI: India's biggest defence project in the making, the critical joint
development of the fifth-generation fighter aircraft (FGFA) with Russia,
has flown into some rough weather.
Defence ministry sources said the inking of the final design and R&D
contract for the stealth fighter has been hit by a huge delay, with Russia
also jacking up costs for the futuristic project. "It's very unlikely the
F... 阅读全帖 |
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W*****d
发帖数: 4196 | 39 http://www.businessweek.com/articles/2012-03-14/the-great-brain
AkzoNobel
(Houston unit, Dutch paint company)
Qinggui Zeng, formulation chemist. Came from China on student visa in 1996,
hired in 2005. Pleaded guilty in 2008 to stealing formula for an industrial
epoxy-based, fireproof coating. Prosecutors said he was planning to return
to China and had solicited investors for a Chinese venture to make and sell
the coating as his own. Trade secrets found under insulation in attic space
at his home... 阅读全帖 |
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g**1
发帖数: 10330 | 40 Boeing reports wing cracks on 787 Dreamliners in production
(Reuters) - Boeing Co said on Friday that "hairline cracks" had been
discovered in the wings of about 40 787 Dreamliners that are in production,
marking another setback for the company's newest jet.
The cracks have not been found on planes that are in use by airlines and
therefore posed no safety risk, Boeing said, adding the problem also will
not alter Boeing's plans to deliver 110 787s this year.
However, Boeing said the cracks, which... 阅读全帖 |
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v**e
发帖数: 8422 | 41 40架生产中的波音787机翼出现裂纹
Wing cracks found on 787s in assembly
By: STEPHEN TRIMBLEWASHINGTON DCSource: Flightglobal.com11 hours ago
Roughly 40 Boeing 787s still in production may have cracks within shear ties
of a wing rib, the company says.
Boeing is inspecting aircraft that may have the condition on three assembly
lines in Everett, Washington, and North Charleston, South Carolina.
“We are addressing affected airplanes as required,” Boeing says in a
statement.
The issue is not expected to impact a pl... 阅读全帖 |
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z********i
发帖数: 40 | 42 你要看过Air crash investigation 就知道这是不可能的。因为现代客机的机舱门都设
计的比门框本身稍大一点，然后由于fuselage里面的气压比外面的压力大得多，飞行时
从里面打开的可能性是零。历史上也从没有乘客舱门被打开过的记录。不过货舱门倒是
有过不少次意外打开的记录，最著名的是DC9的货舱门的不合理设计，还间接导致了道
格拉斯公司的破产。 |
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b****a
发帖数: 4465 | 43 我的理解：
整个飞机的fuselage 是分成好几个sections， 各个sections铆接起来的。 中间是没
有一个从机头延伸到机尾的longeron |
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f*******y
发帖数: 8358 | 44 把整个fuselage炸碎，那得飞机里面堆满了炸药。 |
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发帖数: 1 | 45 安-24 所有事故：
1960s
1962
29 July 1962
A MAP Kiev MSZ An-24 (CCCP-46708) overran the runway at Sheremetyevo
Airport following an aborted takeoff.[1]
1965
20 March 1965
An Aeroflot An-24 (CCCP-46764) landed short of the runway at Khanty-
Mansiysk Airport, struck a snow drift and broke up, killing 43 of 47 on
board.[2]
1966
2 February 1966
A United Arab Airlines An-24 (SU-AOB) crashed at Luxor, Egypt during a
test flight.[3]
18 March 1966
United Arab Airlines Flight 749 crashed while a... 阅读全帖 |
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G*******n
发帖数: 6889 | 46 啥扯淡，谁说AESA不能在平面的盘子里？
https://en.wikipedia.org/wiki/Beriev_A-100
The A-100 is designated as the izdeliye PM, a project meant to develop a
replacement for the A-50 AWACS aircraft. The aircraft is based on the
improved Il-476, which has new PS-90A-76 turbofans that are 15% more
powerful than the D-30KP used by the Il-76. The external shape of the A-100
will be similar to the A-50, with the main radar array housed in a rotating
dome mounted on two struts above the fuselage. The new Vega Premier AESA... 阅读全帖 |
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w********2
发帖数: 632 | 47 The original wing was present on the 1st through 170th F-86F-25 models, and
the 1st through the 199th F-86F-30 models. Planes produced after this came
with factory installed "6-3" wings, North American also sent out upgrade
kits to add the "6-3" wing to around half of the unmodified F-86F's
The original wing limited top speed to 688 mph (1107 km/hr), had a
higher drag coefficient than the "6-3" wing, but also had the stall speed 20
mph (32 kph) lower than the "6-3" wing
The "6-3" wing was de... 阅读全帖 |
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发帖数: 1 | 48 气动分析
：Boeing Shares Slide On Reports 777 Fuselage "Split Dramatically"
During
：Stress Test |
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P***y
发帖数: 529 | 50 http://lt.cjdby.net/thread-1039755-1-3.html
如何才能不去顾忌J-20 原创翻译完工 Bill Sweetman 新博文和相关评论 更有深度
昨天翻译了一篇有关J-20的Bill Sweetman的博客和相关评论《成都的迷雾消散中》，
反应不错。
年底正好不忙，今天再翻译一篇他新的博文和评论，早上看过一遍，觉得更有深度。
首先是Bill Sweetman空间上的本人介绍，当然是业内专家。
他的看法可能比我们的一般专家贵宾要更有价值。
Bill Sweetman
Washington DC
About Me: Bill Sweetman is Editor in Chief of Defense Technology
International.
My Company/Organization: Aviation Week Group
My Job Function: Editor in Chief
My Areas of Expertise: Defense Media
My Areas of Interest: Advanced techno... 阅读全帖 |
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