when they realize that they are about to embark

将来を決める挑戦への旅立ち

on something that will define their future.

すべての若者が いつかは実感する その瞬間

For many here today, this is that moment.

今日は そんな瞬間が訪れる日です

The start of the race will be a very special day for us

レース初日は大切な日よ

'cause we'll have worked for this for so many months,

入念に準備したマシンがいよいよ出発する

and then we're finally there with the car,

[アゴリア　ヤンテ･ファン･ハム]

and you can see it taking off.

すごくワクワクしてる

I just can't wait to get started on this race.

ワールドソーラーチャレンジは まもなくスタートです

I'm very excited.

準備完了

The launch of the World Solar Challenge in Australia

ダーウィンを出発し―

is moments away.

大陸を縦断してアデレードへ

MAN: Ready now.

約3,000キロの道のりを―

[CHEERING]

太陽光だけで走破します

These cars will leave downtown Darwin

最も早くゴールすれば優勝

and travel all the way across the continent

エンジニア業界の注目を獲得します

to the city of Adelaide,

出発は１チームずつ 30秒間隔

covering almost 1,900 miles,

前日の予選ラップの成績順です

powered only by light.

[ポールポジション]

Whoever arrives first will be crowned champion,

先頭はオランダのトップダッチ

and they'll garner the attention of the engineering world.

優勝を狙うには彼らを抜く必要があります

Teams will depart in 30-second intervals

“トップダッチ･ソーラーレーシング”

in an order determined by their qualifying laps yesterday.

トップダッチによるカウントダウンで―

Top Dutch from the Netherlands

ワールドソーラーチャレンジの スタートです

leads the start line.

１台目が走り出しました

Any team that wants to win this race

２番手はドイツのゾネンバーグン

will have to overtake them to do it.

次は日本の工学院大学

[CHEERING]

ベルギーのアゴリア

Top Dutch gets the final countdown...

オランダのトゥエンテ

and the World Solar Challenge is underway.

各チームには伴走車の集団がいます

ANNOUNCER: As the first car takes to the streets...

先頭の車両は―

Next up, Sonnenwagen from Germany,

ソーラーカーの進路を確認

then Kogakuin from Japan,

真後ろにもチームの車がつきます

Agoria from Belgium,

後続車より　コースに別チームあり

and Twente from the Netherlands.

後続はチームのブレーンが乗る指令車

Each team has a large convoy surrounding their solar car.

太陽エネルギーの充放電データや―

There's a lead car keeping an eye

マシン動作データなどを収集します

on everything directly in front of the solar car.

また天気予報も確認し―

There's also a chase car directly behind.

戦略の調整などもします

Race to convoy, we have teams over the track.

主な決断は指令車で下されます

It houses what teams call the brains of the operations,

あれを見て

tracking all the data, like energy in and out,

トラックの影だ

battery readings, and the car's performance.

影は避ける？

They also track all aspects of the weather,

そうだ

so it can be factored in to strategy adjustments.

だよね

Most decision making is done here in the brains car.

大正解

Yeah.

ボランティアの誘導で発進する

-That's how it should be. -Okay. Problem solved.

[スタンフォード　ジュリア･ゴードン]

Currently moving out. Following volunteer instructions.

発進したのでスタート地点で合流する

Our car just started moving

いい気分だ　緊張するけど...

and we're about to catch up with it at the start line.

[スタンフォード　ピーター･ハンセル]

Uh, I'm feeling good. Obviously, nervous,

当然だよね

but that should be natural at this point, I think.

予選で苦戦したスタンフォード

NARRATOR: Stanford had a rough time making it through qualifying,

出場できて喜んでいます

and they're happy to finally be getting into the race.

ジュリア

Yup.

出たら大きく右折して

Okay.

分かった

Car shut off.

マシンが止まった

Yeah.

- 電源？ - そう

It's powering back on.

- 入れ直して - 了解

Car keeps shutting off.

電源が入った

I'm, like, at the starting line.

さっきから何度も止まる

I have started the race...

スタート地点にいるのに

I guess.

動いた

Stanford's underway,

何とかスタートできた

and their convoy is anxious to join their car.

たぶん

Yeah, this is us. Go over there.

スタンフォードが発進

Over there, over there.

急いで合流したい伴走車です

All right, good to go.

あそこだ　向こうへ行って

What should my speed be?

大丈夫　順調に走ってる

Solar car copies.

速度はどうする？

Before the lead teams have even cleared the outskirts of Darwin,

街を出るまでは手動スロットルで

they're already jockeying for position.

40キロメートル毎時

The traffic lights played in our favor...

時速40キロよ

Getting a good position for today's start is crucial.

ソーラーカー 了解

These guys want to be out in front.

[アゴリア]

That's my boys.

ダーウィン郊外を出る前に―

In vehicles behind the solar cars,

首位争いが始まっています

there are a lot of department specialists,

都合よく信号が変わってくれたので 工学院大学の前に出た

each in charge of specific components of the race and car,

[アゴリア　ヨアヒム･ウーテン]

mechanics, electricians, the works.

彼らは赤信号で止まった

And, there are entire crews

初日で上位に入るのは重要です

in charge of camping and food for everyone.

[トゥエンテ]

These teams are big.

首位を狙うチームです

In total, with the solar car,

[アゴリア]

we're with eleven cars.

いい走りだ

Yeah, it's a pretty big logistical operation.

[ゾネンバーグン]

So the total group of people travelling with us

ソーラーカーの後ろは 各分野の専門家の車列です

from Darwin to Adelaide are 40-49.

メカニックや電気技術者が 部品や―

We have one amazing solar car,

レースの構成を監督しています

and then, eleven petrol cars which follow.

チーム全員分の―

NARRATOR: I have to say, in order to prove the tech

キャンプや食料の担当者もいます

in these ridiculously efficient cars,

大きなチーム編成です

they're leaving a pretty big carbon footprint across the outback.

ソーラーカーの他に11台で走るの

I guess that's the price you pay for progress.

[トゥエンテ　フランシス･ファン･エルブルグ]

There are challenges, there are risks in participating.

大規模な後方オペレーションよ

So, as a pilot, you really need to trust your friends

全行程の同行者は総勢...

on what they design and what they build,

[ゾネンバーグン　マルクス･エクスタイン]

and even yourself.

49人くらいだ

So, with the team, with the drivers,

ソーラーカー１台に―

with everyone, we try to minimize the risks.

後続のガソリン車11台のチームだ

But you never know.

高効率マシンの技術を 証明するためとはいえ―

As teams forge their way through the Northern Territory,

大量の二酸化炭素を 大自然に排出しています

the sun is intense,

これも進歩のための代償ですね

providing as much energy as a solar race could ask for.

試練もリスクもある

But the trade-off is,

[アゴリア　ジャスパー･スフライフェルス]

it's really hot.

ドライバーは信頼することが必要だ

Like, humid and a hundred hot.

仲間や仲間の作ったマシンや 自分自身をね

Due to weight and massive power consumption,

チームとドライバーが協力して

these cars don't have any kind of air conditioning,

リスクを減らすんだ

and I really wonder how these drivers are gonna hold up.

でも先は読めない

Solar energy is absolutely amazing

ノーザンテリトリーを快走する車列に 猛烈な日差しが―

when the sun is shining.

マシンに豊富なエネルギーを注ぎます

But to be useful at all times

ただし暑さはケタ外れです

requires battery storage.

高い湿度に気温は38度

These solar car teams

重量と電力消費の問題で

are advancing storage tech out of necessity.

マシンに冷房機器はありません

The race limits them to only 20 kilograms of battery weight.

ドライバーが耐えられるか心配です

That's pretty small.

パワーサイクル完了 動作正常

For that reason, the battery of choice

太陽エネルギーは 日が照っていれば最高ですが

for most teams is lithium-ion.

常時使うためにはバッテリーが必要です

It has a very high energy density,

各チームとも―

meaning it stores more energy in less space.

バッテリーの技術向上は必須です

That's why we use them everywhere,

搭載できるバッテリーの重量は20キロ

from our smartphones, to drones,

かなり小さめです

to cutting-edge solar cars.

そのためリチウムイオン電池が好まれます

However, this reactivity also makes them volatile.

[１個 69グラム]

Inside, a very thin semi-permeable layer

エネルギー密度が高い分

separates the positive and negative electrodes.

電力貯蔵に場所を取りません

If that barrier is damaged, a cascade of reactions

[重量エネルギー密度]

could cause the highly-flammable electrolyte

そのため汎用性が高く

to expand and combust.

スマートフォンやドローン 最先端の車にまで使われます

So, while these batteries are great for storage,

しかし反応性の高さから 発火の危険もあります

any breach or over-taxing

通常は内部の半透過性の膜が―

can cause a four-alarm fire.

正極と負極の接触を遮断

Stanford has cleared Darwin,

仕切りが破損すると化学反応が誘発され

and they're running at highway speeds.

電解液が燃えやすくなり 発火することがあるのです

But only six miles in, something isn't right.

省スペースではあるものの

I smell a not-good smell.

破損や過充電は重大火災の原因になります

I could hear, "You need to pull over right now, get out of the car."

スタンフォードがダーウィンを抜け快走中

I'm like, "Oh, no. This is not good."

しかし開始10キロで異変が

[CORI CRIES]

何だかヤバそうな匂いがする

With just seconds to spare,

道の左側に停車して

Stanford's driver, Julia, is safely out of the car.

今？

Her teammates have wrestled the overheated battery

今すぐ左側に停車して

out of the vehicle as well,

マシンを降りて

and things are going downhill fast.

今すぐ降りろって言われて

Guys, move away from the car.

マズいと思った

Everyone, away, please.

前方にいるはず

It's okay, it's okay.

早く...

I'm so glad you're okay.

落ち着いて

You could tell immediately something was looking severely wrong,

間一髪のところで―

and the next call we hear is, battery fire,

ジュリアはマシンを降りました

everyone needs to come back now.

仲間が熱暴走したバッテリーを 何とか車外へ

Um... And that was awful.

状況はみるみる悪化しました

I don't think I'm ever gonna forget that moment

車から離れて！

ever in my entire life.

全員 離れて！

Okay, smoke's toxic. Stay out.

無事でよかった

NARRATOR: Stanford's World Solar Challenge is over

残念ね

almost faster than it began.

大丈夫よ

They will have to tow their car

本当によかった

all the way to the finish in Adelaide.

変だと思ってたら...

We think there may have been some changes

[スタンフォード　コーリ･ブレンデル]

that we had to make to the car to pass the rules

次の連絡で“バッテリーが燃えた”って

that could have caused an issue.

最悪な瞬間だった

There could have been something we did on our pack that was an issue.

きっと一生忘れないと思う

We got the driver out safely,

有毒ガスだ　離れて

which is the most important thing.

スタンフォードの挑戦は終わりです

I think everyone's gonna be sad about the car for a while.

あっという間でした

You just gotta figure out a way through it

悲しいよ

and move forward.

彼らはアデレードのゴール地点まで マシンを運びます

And that's, I guess, what we also have to do

ルールに従って変更した部分に―

as a group.

[スタンフォード　マギー･フォード]

NARRATOR: Back on the road, Twente is still on a tear,

問題があったか

but so is team Agoria.

またはバッテリーの問題か

They have each passed two cars coming out of Darwin,

ドライバーが無事でよかった

and are just behind Top Dutch,

しばらくは落ち込むだろうけど

who is barely hanging on to their lead.

何とか乗り越えて前進しなきゃ

Twente is keeping up a blistering pace.

チームとして必要なことだと思う

The question is, can they catch the leader

[トゥエンテ]

on the very first day?

順調に走るトゥエンテにアゴリアが続きます

This desolate place is Katherine,

[アゴリア]

the site of the first control stop

両マシンとも２台を追い抜き

where all of the solar cars must come in here

トップダッチに迫ります

and stop for a half hour.

その差は わずかです

I'm excited to see them after this significant part of the journey.

トゥエンテは超高速を維持

Control stops are mandatory, mostly for driver safety.

問題は―

They force teams to change out their drivers,

初日に首位を奪えるかどうか

and they also give convoy vehicles a chance to refuel.

[キャサリン コントロールストップ]

Katherine is only the first of nine control stops along the way,

第１コントロールストップは 人里離れたキャサリン

and much to my surprise, first in is Twente.

[番組ホスト　デレク･ミューラー]

Remarkable. They started five cars back in Darwin,

すべてのマシンが―

and they've already pulled into the lead.

30分間 ここで停車する

These control stops are really interesting

重要なポイントで この先が楽しみだ

because the drivers have to pull in here,

[１キロ先]

and they can make any adjustments they want

コントロールストップでは安全のため―

to the vehicle as they get out.

ドライバーを交代させます

But once they leave the car, they cannot come back to it.

伴走車の給油も行います

No one from the team is allowed to touch the car

ここは９ヵ所ある コントロールストップの１番目

for a half hour.

最初に来たのは 意外にもトゥエンテです

It's gonna charge up just from the sun,

ダーウィンでは５台後ろにいたのに

and then, if it's all good, the driver hops back in

あっという間に首位です

and they'll take off down the road.

コントロールストップでは 30分間 必ず停車する

Each driver must make their way to the officials' tent

降車前ならマシンの調整は可能だけど 一度 車から離れたら―

and trigger a button, starting their half hour.

チームの誰であれ 30分間はマシンに触れない

Nicely done. Congratulations.

太陽光だけで充電して

In past events,

問題がなければ再び乗車

some teams would use the control points as pitstops

レースの再開だ

to make repairs and modifications while off the clock.

ドライバーがテントへ行き

To force teams to build more robust cars,

30分のタイマーをセット

race officials created the no touch rule,

上出来だ　おめでとう

forcing teams to implement fixes

[トゥエンテ　ローレンス･シャルク]

on their own time, or not at all.

[トゥエンテ　マリスカ･ボス]

So, what I think is interesting is, obviously, this race

期待以上だった

is about harnessing the power of sunlight.

寿命が縮んじゃいそう

But when you start in Darwin, you have a full battery.

何年かね

Yes.

以前はコントロールストップを利用して

So, one strategy that one could employ for day one

整備をするチームもありました

would be to drain that battery

今 それは許されず より頑丈なマシンが求められます

and get out fast, ahead of everyone.

整備はレース中に行うか しないで走るかです

So, I guess what I'm curious about is,

レースの魅力は太陽光を 利用することだけど

how much energy is left in your battery?

スタート時はバッテリーを？

I'm not going to say anything about that, I'm sorry.

ええ

It is true that we start with a full battery,

戦略どおり 満タンのバッテリーを―

and of course, the remaining four days

ギリギリまで使って首位に躍り出た？

we can only charge with solar energy.

だとしたらバッテリー残量は？

It's on day one where this car could be bluffing,

[トゥエンテ　アナリーズ･デッカー]

could be using a lot of battery,

それは答えられない

but we won't know until a few more days...

確かにバッテリーは満タンだったし

Exactly.

残り４日は太陽エネルギーしか 充電できないわね

...whether it's really running on sort of a neutral energy balance.

初日から かなりバッテリーを使っても

Is there a risk of going out too hard on day one?

実際のところは数日たたないと分からない

Like, is it possible to drain that battery too much?

そうね

Yeah, of course, there's always a risk.

両方バランスよく使ってるのかも

I mean, there's also a risk

初日から飛ばすリスクは？

if you don't drive too fast on day one,

バッテリーを使いすぎない？

that you are way back.

もちろん そうだけど

But of course, there's also a risk if you drive too hard.

逆のリスクもある

Next in is Top Dutch,

初日に飛ばさないと 置いていかれてしまうわ

who have not been able to hold on to their starting position.

飛ばしすぎてもリスクはあるけど

[SPEAKS DUTCH]

２位はトップダッチ

So, we're talking, like, 25 minutes behind.

ポールポジションからの後退です

They're 25 minutes behind.

25分遅れってところかな

And then, Agoria.

僕らの25分後だ

It is a very hot day, being a driver in this car...

３位はアゴリア

The temperature in that cockpit