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为什么在飞行中不能打开舱门 – 译学馆
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为什么在飞行中不能打开舱门

Why You Can't Open An Airplane Door Mid-Flight

This is episode 123 of “The Twilight Zone,”
这是系列剧《阴阳魔界》中的第123集
“Nightmare at 20,000 Feet.”
“在两万英尺高空的噩梦”
Arguably one of the most iconic episodes of the show ever made,
是该剧有史以来最经典的其中一集
it stars William Shatner as a:
本剧由威廉·夏特纳出演
Clip: Portrait of a frightened man: Mr. Robert Wilson.
一个惊恐的男人: 罗伯特·威尔森
Narrator: Bob sees a gremlin on the wing of the plane
剧集中鲍勃看到机翼上有一个怪物
and decides the only possible solution to the problem
而唯一可能解决问题的办法是
is to steal the air marshal’s gun, open the emergency exit,
偷走空乘的枪并打开紧急出口
and shoot the thing.
朝怪物开枪
Clearly, this scene is complete fantasy.
很明显的是 该场景纯属幻想
And I’m not talking about the gremlin.
我将要讨论的可不是什么怪物
为什么飞机在飞行时不能打开舱门
There are a couple of reasons
飞机在飞行中
why you can’t open an airplane door mid-flight.
不能打开舱门有几个原因
The first being: It’s locked.
首先 门是被锁死的
But there’s another big factor
但是《阴阳魔界》似乎忽视了
that “The Twilight Zone” seems to ignore,
一个重要的因素
and that’s physics.
那就是物理因素
Let’s consult our first completely reliable source,
我们查阅第一手可以信赖的资源
the episode’s IMDb “Goofs” page.
该剧在互联网电影数据库的穿帮页面
It says the plane Shatner’s flying in
上面提到夏特纳搭乘的飞机
is either a twin-engined Convair
是装有双发动机的康维尔
or a four-engined Douglas DC-6 or DC-7.
或配有四个发动机的道格拉斯DC-6 DC-7
All of which would have been pressurized.
这几种飞机都经增压
The higher a plane flies,
飞机飞得越高
the lower the air pressure outside.
外面的气压越低
And the lower the air pressure,
气压越低
the harder it is to breathe.
越难呼吸
That’s because the air is thinner the higher you go.
这是因为所处高度越高空气越稀薄
The molecules are literally farther apart.
分子离就得越远
So there are fewer oxygen molecules in every breath you breathe
因此每呼吸一次的氧分子越更少
and less pressure diffusing that oxygen into your bloodstream.
将氧分子扩散到血液中的气压也更小
Over 18,000 feet above sea level,
在海拔18,000英尺以上的高度
and our bodies just aren’t able to absorb enough
我们的身体无法吸入充足的氧气
to keep us functioning.
来维持身体的正常机能
That’s why planes are pressurized
这就是飞机舱的气压增压到
to mimic conditions about 8,000 feet above sea level.
模拟海拔8千英尺气压水平的原因
It’s a nice middle ground that lowers
在这个绝妙的中间气压水平值下
the oxygen in our blood by only about 4%,
血液中的氧含量只降低了4%
which is not enough to really affect how we function.
这不足以影响身体的机能
Modern airlines fly at about 36,000 feet above sea level.
现代飞机在海拔36,000万英尺的高度飞行
If they weren’t pressurized,
如果飞机未增压
it would cause delirium
几秒内会引起乘客神智不清
in seconds and knock you out in under a minute.
不到一分钟 乘客便会晕倒在地
and the difference between the inside of the plane and the outside can be huge.
飞机内外的差异可能是巨大的
which is exactly where the doors come in.
这正是飞机舱门的由来
Inside the cabin, 8 pounds of pressure
在机舱内 每平方英寸的表面
push against every square inch of surface area.
承受8磅重的压力
The typical passenger door is about 6 feet tall by 3 1/2 feet wide.
而典型的客用舱门6英尺长 3.5英尺宽
So we’re looking at more than 24,000 pounds of pressure bearing down on that exit.
因此舱门出口承受了24,000磅的压力
The strongest man alive can deadlift only 1,102 pounds.
而世界上最强壮的男子硬举的极限值只有1,102磅
“But wait!” you scream at your computer screen.
”但是 等等 ” 你朝着电脑大叫
“This nightmare was at 20,000 feet, not 36,000.
“剧集中的飞机在两万英尺高度 而非36,000英尺
The pressure would be lower!”
舱门承受的气压更低”
You’re right, but there’s no need to yell.
说的没错 但也不必大叫
Clip: Keep your voice down.
请小声一点
Bob: I’m sorry, I’m sorry.
(鲍勃) 抱歉 抱歉
Narrator: The pressure would be lower,
气压会更低
but still too much for a person to overcome,
但是对于人而言却难以承受
even William Shatner.
即使是他是威廉·夏特纳
And the door flying out into the inky black?
舱门会飞到黑漆漆的夜空吗?
Practically impossible on a modern plane.
实际上 这在现代生产的飞机上是不会发生的
Most passenger doors are tapered,
大多数客用舱门是梯形的
the inner edge being wider than the outer.
舱门内部边比外部边宽
It’s called a plug door,
这叫做内嵌式门
and it basically acts like a bathtub-drain stopper,
功能基本上如同浴缸的下水塞子
corking the hole without falling through.
堵住孔又不会掉进去
But what if someone on your plane
但要是飞机上的乘客
had Shatner’s superhuman strength?
拥有像夏特纳超人的力量呢?
It could cause something called “explosive decompression.”
这可能会引起爆裂性失压
And it’s the one thing “The Twilight Zone” got mostly right.
这一块《阴阳魔界》大体上是正确的
During an Aloha Airlines flight in 1988,
1988年阿罗哈 (Aloha Airlines) 的一航班
a piece of the fuselage tore loose at 24,000 feet,
一块机舱顶在2,4000英尺的高空脱离机身
leaving “blue sky where the first-class ceiling had been,”
“原本头等舱的天花板变成了蓝天”
According to the captain.
据机长回顾
the chief flight attendant was instantly
航班的空乘主管立即
sucked out of the plane through that gaping hole.
从机舱顶的破洞被吸到机外
Explosive decompression happens infrequently,
爆裂性失压很少发生
but it does happen.
但确实有这种现象
A rip in the plane wall, a window cracks,
飞机壁 窗户上的裂缝
it doesn’t matter the cause.
由什么引起的并不重要
The huge pressure difference creates a vacuum
巨大的气压差产生的吸力
capable of shooting anything up to 1,000 pounds out into the sky.
能把任何重达1000磅的东西吸进空中
And that vacuum effect would last until
吸力效应会持续下去
the pressure inside the cabin matched the pressure outside.
直到舱内外的压力一样大
So Shatner made a good call buckling himself in
所以夏特纳做了个正确的决定
before opening that emergency exit.
他在打开紧急出口前 系好了安全带
If you don’t live in the Twilight Zone,
如果你没有生活在《阴阳魔界》
your chances of pulling open an airplane door mid-flight
在飞行中拉开舱门的可能性
are just as good as seeing a gremlin on the wing.
和看到机翼上的怪物一样大
So the next time you start getting nervous about it,
那么下次你紧张的时候
just remind yourself:
只要提醒自己:
Bob: I’m gonna be all right.
(鲍勃)我会没事的

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为什么飞机在飞行的时候不能打开舱门,让我们从物理角度来分析,快点击视频寻找答案吧。

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