Name: 為什麼我們還沒有電動飛機？ (Why We Still Don't Have Electric Planes)
Uploaded: 2020-10-23T20:25:07.000Z
Duration: 9 min 4 s

What could a future with electric planes look like?

25元的機票，比較安靜的機場。

程度副詞

battery-powered planes for this cleaner future.

電池驅動的飛機，以實現這個更清潔的未來。

從上世紀70年代開始就已經出現了。

那麼，是什麼讓他們立足於此？

when the battery just couldn't hold enough energy.

當電池無法容納足夠的能量時。

When nickel-cadmium batteries were invented,

the first flight with an electric motor took off,

第一次使用電動機的飛行起飛了。

They could store more power than ever before,

它們可以儲存比以往更多的能量。

leading to planes like the Solar Impulse 2.

導致像太陽動力2號這樣的飛機。

Starting in 2015, the solar-powered aircraft

花了16個月時間在世界各地飛行。

Solar Impulse 2是一個運動的一部分

in recent years to develop alternative energies,

especially when people and governments started realizing

特別是當人們和政府開始意識到

just how bad flying was for the environment.

but it's almost as much as the entire continent

Kevin Noertker: We need to make changes to the industry,

Kevin Noertker:我們需要改變這個行業。

and electrification is one of the big trends

在人們的心目中，有一段時間。

but two big problems are keeping electric grounded.

但有兩個大問題是保持電的接地。

首先，技術還沒有完全準備好。

When you're trying to get an electric plane off the ground,

當你想讓電動飛機起飛的時候。

you want a battery that packs a lot of punch

Carolina Anderson: Batteries are not as efficient as gas,

卡羅琳娜-安德森。電池的效率不如天然氣。

and they're probably not gonna be for a while.

Right now, even the best batteries have a specific energy

現在，即使是最好的電池也有一個特定的能量。

but we have to get closer to 800 to really start flying,

但我們必須要接近800元才能真正開始飛行。

which is nearly 12,000 watt-hours per kilogram.

Think about it like those computers from the '80s.

想想看，就像80年代的那些電腦。

他們的體型很大，但力量卻小了很多

Right now, batteries are like those '80s computers.

現在，電池就像那些80年代的電腦。

They're not as powerful as they need to be,

他們的力量並不像他們需要的那樣強大。

and they're not just big, they're also heavy.

So if you want to add more power to a plane,

所以如果你想給飛機增加更多的動力。

and to get that plane airborne despite the weight,

you'll need even bigger battery that's more powerful,

你需要更大的電池，更強大的。

And then you'll need an even bigger battery

但即使工程師們設計出一架飛機

they have to take on the industry's second hurdle,

他們要攻克行業的第二道難關。

of their aircraft is safe, passing a series of tests,

的其飛機是否安全，通過一系列測試。

one of which is to make sure the battery cells

羅伊-甘扎爾斯基：如果出了問題。

There's only one place for that airplane to go.

那架飛機只有一個地方可以去。

And so the regulatory stringency is much higher,

所以監管的嚴格程度就高了很多。

Narrator: The FAA amended its rules in 2016

旁白：聯邦航空局在2016年修改了規則

to allow electric propulsion systems in airplanes

允許在飛機上使用電動推進系統。

The real problem, though, is that certification,

即使有這些修正案，也需要幾年時間。

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為什麼我們還沒有電動飛機？ (Why We Still Don't Have Electric Planes)

specific

entire

experiment

impulse