s**x
发帖数: 7506 | 1 How do airplanes stay up?
To overcome the forces of drag and gravity, an airplane must generate two
forces of its own: thrust and lift.
Thrust is the force that propels an airplane forward on the runway. By
Newton's third law — every action has an equal and opposite reaction — the
plane's engine generates forward thrust by spewing fuel backwards. Next, as
the plane hurtles down the runway, each of its wings slices the air into
two streams, one that flows above it and the other, below. The wings ... 阅读全帖 |
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h*******e
发帖数: 114 | 2 My parents have been here in USA for 4 years and their initial B2 visiting
visa have already expired. I received citizenship this year and have applied
the green card for them which are still pending.
They have valid Chinese passport.
I am planning to take them to visit Orlando, Florida by airplane.
Will my parents have trouble boarding the airplane? Will the airplane staff
look at the Visa status or they just look at the passport?
Thanks a lot for your help.
Dan |
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d****t
发帖数: 748 | 3 ☆─────────────────────────────────────☆
xiaozhu (體育用品) 于 (Tue Jun 7 23:11:06 2005) 提到:
【 以下文字转载自 Science 讨论区,原文如下 】
发信人: hagerty (值夜班, 不打麻将), 信区: Science
标 题: how can an airplane fly?
发信站: Unknown Space - 未名空间 (Tue Jun 7 14:55:37 2005) WWW-POST
in the latest 'DISCOVER' magazine, one article caught my eyes. It's about
some common 'misconceptions' in our daily life. It talked about how an
airplane can fly. It said some people have misconception - They thought
airplane can fly because of |
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d*********e
发帖数: 3835 | 4 IMPROVEMENTS
******
Washington, DC -- Today the National Transportation Safety
Board adopted a study concluding that single engine
airplanes equipped with glass cockpits had no better overall
safety record than airplanes with conventional
instrumentation.
The safety study, which was adopted unanimously by the
Safety Board, was initiated more than a year ago to
determine if light airplanes equipped with digital primary
flight displays, often referred to as "glass cockpits," were
inherently safer |
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k***s
发帖数: 14 | 5 Hello everyone,
My house is close to Catamaran Park. It is not directly under the airflight
path, but can still hear quite a bit airplane noise from rooms facing the
northeast direction. Half of the windows are single pane and the other half
are double pane.
Does installing double pane windows reduce noise level? I heard the
airplane noise are low frequency noise and double pane window may not help
for this type of noise.
How do you deal with airplane noise in FC?
thanks in advance,
Kanas |
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c*******1
发帖数: 9 | 6 I got J1 visa for one year (postdoc). Do I need to provide return airplane
ticket when I enter USA? Can I buy
single airplane ticket? Thank you very much. |
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c*********t
发帖数: 2921 | 7 airplane mode,就是disable和手机有关的功能，就不会去和基站联系，对吗？
如果这样的话， 把Iphone带回国，只要turn on airplane mode,就不会有国际漫游，
就不怕美国的朋友打电话给你，就不会charge国际费用，对吗？我就只是想让国内的小
朋友玩玩手机上的游戏。
谢谢！ |
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w******2
发帖数: 1664 | 8 有感于隔壁帖说手机自己偷跑流量，我奇怪了随手开关LTE，怎么还会跑流量呢？
我现在更好，手机整天开着airplane mode, 反正FP接电话要数据开着才行，光有信号
也没P用，所以我索性连信号都关了。 要用的时候开个wifi or LTE，用完继续
Airplane mode。 现在基本都微信，每天两点一线，公司和家都有电话，GV forward
call， 这样也没人打我手机，还开着信号干嘛？ |
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w*******y
发帖数: 60932 | 9 Features
Portable, compact ultra slim 150 VAC 150 Watt DC/AC universal power
inverter
Automobile adapter plugs directly into your car cigarette lighter and
uses the DC battery power to operate a notebook computers, personal DVD
players or other electronic devices
Airplane adapter plugs right into the in-seat power receptacle and works
on American, Delta, Continental, United, British Airways, Virgin Atlantic,
KLM, and all airplanes equipped with the EmPower in-seat power supply system |
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A******e
发帖数: 6 | 10 To all,
Very sorry for me not to input Chinese words!
Can we use airplane or flying boat(in Washington DC over ABC headquarter) or
TV to advertise ABC promoting Racial Hatred? |
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k*****9
发帖数: 516 | 11 只要打开airplane mode 就行！叔这次出差国内，听到广播后吃了一斤，特意把空姐叫
来问清楚；说是刚开始的规定！我估计也是架不住其他国家的游客的挑战！
这和当初抵制PM2.5结局一样！愚昧治国！叔坐等下一个被挑战的愚昧政策：沾酒开车
必罚！尼玛人体有代谢功能好哇！酒精对大脑的影响是和浓度有关系的；可惜我鳖不懂
啥叫浓度，0.04，0.08； |
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h****m
发帖数: 2642 | 12 With green card, can i buy airplane ticket from New York - Hongkong and
another one from hongkong - Shanghai? This give more choices of fly time in
Hongkong.
Thanks for help. |
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c********e
发帖数: 49 | 13 二手交易风险自负！请自行验证是否合法和一手卡！:
我想卖的物品:
90K + 52K United Airplane UA 里程 @1.5
单张面值:
可接受价格(必须明码标价！):
物品新旧要求:
邮寄方式要求:
买卖双方谁承担邮寄损失(Required if not code only):
付款方式说明:
其他补充说明:
广告的有效期:
物品来源(Required for All Cards!):
我的联系方式:
站内
Warranty期限:
能否证明是合法的一手卡?(Required for All Cards!):
state and zip: |
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s********a
发帖数: 59 | 14 Just installed Zephyr Venesia 42" hood. Only 720cfm. Mounted on the wall. No
turns. There are 5 speeds+burst. I can stand 4th one. The 5th was getting
really loud and the "Burst" speed sounded like an airplane.. Is this normal?
The look is preety neat. |
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s****o
发帖数: 175 | 15 gas去complete saving和shopper上买油卡，hotel, airplane的话搞张fia amex 2%
everything就好了。
有包子没？ |
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l*****e
发帖数: 8596 | 16 sorry can't type Chinese now.
Is frozen milk allowed to take on the airplane? Carry on or checked? dry-ice
? how to pass security? how much allowed?
Thank you for any info. |
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o**1
发帖数: 6383 | 17 Businesses ordered more airplanes, autos, and other factory goods as supply
disruptions fade
今天要绿了 |
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c**d
发帖数: 3888 | 18 No problem with this. Part of the lift is generated by Bernoulli, part by
the downward defelction. It's why an inverted airplane can still maintain
lift
deflected |
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m*******e
发帖数: 1280 | 19 read a couple of years ago from Popular Mechanics that you could spend
10K to purchase a whole set of parts with detailed instructions then
assemble a airplane yourself. |
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A***o
发帖数: 351 | 20 【 以下文字转载自 PhotoGear 讨论区 】
发信人: Atubo (阿土伯), 信区: PhotoGear
标 题: Can we carry on Aluminum Tripod on the airplane ?
发信站: BBS 未名空间站 (Tue Aug 9 14:25:48 2011, 美东)
Thanks,
It is made of Aluminum , Weight: 5.7 pounds.
Thanks |
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y****n
发帖数: 3184 | 21 赔的动画片你都根本没看到
每年至少有一半动画片是赔的
好多连在影院上映的机会都没有
说回这个airplanes就是在透支赛车总动员 |
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b*******r
发帖数: 6655 | 23 我把能关的都关了，location只剩一个地图一个waze，notification 也没几个，email
都不用push，是manual,结果sleep mode差不多还是每小时掉电1%, 昨晚用了airplane
mode, 总共掉1%
不是说sleep mode wifi 也断了吗？究竟什么东西在耗电？ |
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s******p
发帖数: 28 | 24 我有airplane interior certification engineer interview, 请大家提面试建议.
多谢了.
我有身份和一些经验. |
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s******p
发帖数: 28 | 25 我有airplane interior certification engineer interview, 请大家提面试建议.
多谢了.
我有身份和一些经验. |
|
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s****e
发帖数: 3310 | 27 嘿嘿，俺说的有些沉重了。。。嗯，再贴一首歌。
_________________________________________________________________
Can we pretend that airplanes
In the night sky
Are like shooting stars
I could really use a wish right now (wish right now, wish right now)
Can we pretend that airplanes
In the night sky
Are like shooting stars
I could really use a wish right now (wish right now, wish right now)
Yeah
I could use a dream or a genie or a wish
To go back to a place much simpler than this
Cause after all the partyin' and smashin... 阅读全帖 |
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s*******w
发帖数: 2257 | 28 美国 9.11事件 发生时的另一航班 - - 达美15
2015-05-22 20:03:29
生活里天天充滿着美好充盈着愛。
我是達美航空公司15號班機的機組人員，2001年的9月11日從德國的法蘭克福機場飛越
大西洋，目的地是美國的亞特蘭大。
忽然，機艙內的布簾都拉了起來，我被叫到駕駛艙去見機長。在那兒，幾個機組人員都
面露嚴肅。機長給我一張紙條，這是從亞特蘭大機場辦公室發出來的訊息，上面寫著：
「所有私人航空公司飛往美國的航道全部關閉，請盡速降落在最近的機場，並請告知你
的降落目的地。」
沒有一個人對此訊息有隻字片語，我們都知道事態的嚴重性。我們需要立刻找到一個陸
地降落，機長決定最近的機場是離我們400英里遠的甘德, 紐芬蘭。
機長要求加拿大航空交通控制中心核准路線的改變，我們沒有被質疑而獲得即刻的核准
，後來我們才知道為何我們的要求毫不遲疑的被核准。
當我們正準備降落時，另一個訊息從亞特蘭大傳來，告訴我們在紐約地區有恐怖行動。
幾分鐘後，我們知道是劫機事件。
尚未降落前，我們決定跟乘客撒個白謊，說是一個小小的機械問題需要降落在最近的機
場-甘德, 紐芬蘭，做個檢查。
我們答應... 阅读全帖 |
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T*R
发帖数: 36302 | 29 呵呵，你敢不敢坐波音：
This is an extended version of an interview with a worker at Boeing South
Carolina, which assembles the 787 "Dreamliner". He contacted us in 2014 with
concerns about the quality of work in the plant and drug abuse among the
workforce. At his request, we are not revealing his identity.
Drug abuse
I've seen a lot of things that should not go on at an airplane plant…
people talking about doing drugs, looking for drugs, specifically marijuana,
methamphetamine, cocaine.
I have seen Oxycon... 阅读全帖 |
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a**********a
发帖数: 544 | 30 Air France Flight 447发生顺序是
1.空速管失灵,autopilot disengaged.整个过程中只有空速管失灵,其他所有仪表均正常
2.pilot 1 who controls the airplane pulls the airplane nose up.直到飞机坠海,
airplane nose stays up
3.airplane flys from 34,000 feet to 38,000 feet, the speed decreases, nose
is still up
4.airplane falls from 38,000 feet, because the airplane nose is up, the
speed keeps decreasing
5.失速alarm trigged,但是pilots不知道如何处理.
6.Captain comes in
7.在2,000 feet,Captain发现了原因,要求pilot 1 push down the nose.但一切都太晚
了.
空速管失灵是诱因,pull the nose up... 阅读全帖 |
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G***G
发帖数: 16778 | 31 May I ask, how to know a specific airplane trys to connect to a satellite?
When an airplane ping a satellite, which kind of information is
required for the ping?
airplane ID, airplane attitude, velocity, etc?
How a satellit knows a specific airplane pinging it?
MH370 |
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C*I
发帖数: 4736 | 32 Why United Was Legally Wrong to Deplane David Dao
Jens David Ohlin,Newsweek 3 hours ago
This article first appeared on the Dorf on Law site.
On Sunday, United Airlines passenger David Dao was forcibly removed from
his United Airlines flight when he refused to relinquish his seat. The
police officers who removed him from the seat, then dragged him down the
aisle of the airplane. Videos of the incident show a visibly injured and
bloodied Dao screaming.
Videos also show a clearly injured Dao retu... 阅读全帖 |
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d*****l
发帖数: 8441 | 33 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 | 34 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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l**t
发帖数: 6971 | 35 【 以下文字转载自 SanFrancisco 讨论区 】
发信人: lopt (好好学习天天向上), 信区: SanFrancisco
标 题: 韩国两家航空公司的飞机千万不能坐！
发信站: BBS 未名空间站 (Sat Jul 13 03:05:44 2013, 美东)
这个是我在Yahoo News的comments看到的。一个在韩国两家航空公司教了五年的美国飞
行教官写的。基本就是讲，这两家公司的飞行员普遍不具备基本飞行技能，训练和考试
偷奸耍滑。摔飞机才是正常的。这次旧金山机场趁天气好维修自动助降的仪器，韩亚飞
行员就原形毕露了。
=====================================================
After I retired from UAL as a Standards Captain on the –400, I got a job as
a simulator instructor working for Alteon (a Boeing subsidiary) at Asiana.
When I first got ther... 阅读全帖 |
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D******e
发帖数: 11265 | 36 【 以下文字转载自 Stock 讨论区 】
发信人: lopt (好好学习天天向上), 信区: Stock
标 题: 韩国两家航空公司的飞机千万不能坐！ (转载)
发信站: BBS 未名空间站 (Sat Jul 13 03:06:23 2013, 美东)
发信人: lopt (好好学习天天向上), 信区: SanFrancisco
标 题: 韩国两家航空公司的飞机千万不能坐！
发信站: BBS 未名空间站 (Sat Jul 13 03:05:44 2013, 美东)
这个是我在Yahoo News的comments看到的。一个在韩国两家航空公司教了五年的美国飞
行教官写的。基本就是讲，这两家公司的飞行员普遍不具备基本飞行技能，训练和考试
偷奸耍滑。摔飞机才是正常的。这次旧金山机场趁天气好维修自动助降的仪器，韩亚飞
行员就原形毕露了。
=====================================================
After I retired from UAL as a Standards Captain on the –400, I got a job... 阅读全帖 |
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h***o
发帖数: 6 | 37 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 |
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z*****4
发帖数: 835 | 38 搜了下wiki，发现除了毛子以外，PLA、NATO还有许多大国小国都有打飞机的历史。
http://en.wikipedia.org/wiki/List_of_airliner_shootdown_inciden
1940s[edit]
Kaleva OH-ALL[edit]
Main article: Kaleva (airplane)
Junkers Ju 52-3/mge "Kaleva" OH-ALL was a civilian transport and passenger
plane operated by the Finnish carrier Aero O/Y, shot down by two Soviet
Ilyushin DB-3 bombers on June 14, 1940, while en route from Tallinn, Estonia
, to Helsinki, Finland.[1] This occurred during the Interim Peace between
Finland and the Soviet Union, t... 阅读全帖 |
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Q********a
发帖数: 851 | 39 Your point if any, does not stand.
First you claim the US would not shoot down an airplane, I told you it did
; showed you the link.
Then you argue nah that's irrelevant. I told you it is - accomplice is as
guilty as the principal.
Then you argue oh no they wouldn't shoot down their own airplane. Well then
of course you did not check that link because Cessna is a US company and
Cessna airplane is a US made airplane.
If these are your points, then I'm sure you are going to argue oh no
they never ... 阅读全帖 |
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