Pratique du Shadowing: How much helium does it take to lift a person? - Apprendre l'anglais à l'oral avec la vidéo
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About 70 ,000 litres.
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And yes, those are real people flying under real helium balloons, but if you just want to know the answer to how much helium you need to lift a person, while an average adult weighs about 70 kilos,
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in normal conditions, one litre of helium will provide enough lift for about one gram, so you'd need about 70 ,000 litres.
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Proving that, and finding out how this is done safely, and how you can also have a go, that's the rest of this video.
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I've wanted to do something like this for years, of course I have.
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I think lots of people have dreamt of flying away on balloons, but as far as I knew, the logistics and safety required made it impossible, unless you had a ridiculous budget.
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And then, someone told me about Aeroplume in France, and the budget dropped to 60 euros for a ticket.
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So the rest of this video isn't going to be scripted, it's just me, one of the team here holding my camera, and about 70 ,000 litres of helium that's going to lift me up.
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This hangar was built in 1919.
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It was used first for the blimp, to surveil and fly over the coast to detect the enemy submarines and in 2000 he goes out of the military domain.
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Be careful to your head.
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Oh yeah that is that's that's solid okay.
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The history of the aeroplume starts maybe more than 20 years ago.
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That's a blimp who was created by a man who was called Jean -Pierre David.
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He was a French artist.
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That was much easier than I thought it would be.
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He discovered the world of the blimp and felt in love, and so because he's an inventor,
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an artist, an engineer, he decided to create his own blimp, big enough to allow him to fly by beating the wings.
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Since 2009, we propose our people to fly here.
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The other location is a cave, 50 meters under the ground.
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We propose the flight here during all the French school holidays.
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So if we just let you go now what you will go on the top
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and you won't be able to go down ever say Right, so if I want you to be free and autonome, I have to make you reach the static balance.
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Okay, that's why Depending on your weight.
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Yeah, I can add
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Some little weight like this got it to your blimp in order to make you float
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If you just take off this this oh what what is
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happening you're just floating here just floating we have three aeroplumes here
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and they are different by their volumes we have a bigger one
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that can carry up to 90 kilograms we have one
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that can carry up to 70 kilograms
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and one can carry up to 45 now you can take
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the wings by the black handle everything you will do you
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will do it really slowly yep that's the same as
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if you were swimming okay so first i will show you how to move forward You want the wings to be flat, like this, in order to go,
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take some air and push behind.
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Like paddling a kayak?
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Yeah, exactly the same as in a kayak.
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And if I want to turn, it's with one?
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Exactly.
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So you know how to turn, if you are doing only one wing, you will turn.
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It doesn't react so quickly, but when it's turning, now you can take a break,
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it will continue during a very long time there is a
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lot of inertia yeah yeah i didn't feel like i was turning at all
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and then suddenly i was yeah and we can also go back
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if you want to by pushing the air on the front
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and go flat again to go up the same as
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if you were swimming again yeah
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when you go forward the air is going under the wings
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and that provides left you have to switch yeah to make the same angle
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when you go back
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and this is every time like this from the front to
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the back you can feel it the air is going under the wings
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if you want to go down it will be the opposite movement that feels
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so natural yeah the opposite way of going up at the
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beginning of the season we just choose to fill the blimp with 100 percent helium there
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and with the time the helium is going out there is some leaks
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so we can just add some more allium to compensate
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and the really one problem here is the osmosis
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so there is the air present outside that wants to go in the aeroplume
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and once he's in we can't extract him
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so the more we spend the time here the more air is inside
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so the less he can carry once a year we have the obligation to just empty everything
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and refill again of course we are conscious of the helium because it's very expensive and we don't want to waste helium.
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When you don't do nothing, once you get high, the volume is going down.
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That's because, and maybe we will repeat that after, but we made you reach the static balance and it depends on the temperature.
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And the more higher you go...
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I'm definitely going up quite quickly now.
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That's why I just take off one kilogram The higher you are, the hotter it is.
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Now you reach a new situation of static balance with a new condition of temperature.
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Because of the slow speed of the balloon and the inertia, we have to pilot really slowly and that's why we are indoor,
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to be protected against the wind and all the variation of the weather conditions.
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I noticed you had a sign on the door saying make sure that the door is closed,
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because the slightest breeze would blow me completely off course there is no problem of safety
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because we're following you on the ground always linked by a little tether
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but the tether is slack you're not holding me down here I'm just floating you are totally free
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if you slow and quiet enough you will realize how to pilot
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and have the time to anticipate so the tether is not used take some break
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and observe that it's still turning left yeah you can rest also wow
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if it's too late to avoid the wall
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or the roof it will pull not for your safety
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but for the safety of the blimp otherwise if we just touch
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so many times it will break that's not a pressurized balloon that's just an envelope filled with helium
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so the helium will just go out slowly it will lose his capacity to carry so the pilot will land slowly.
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I'm amazed how calm and safe I feel right now.
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It's happened one time here, some elements from the roof just go through the envelope and the pilot didn't notice that.
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He was just trying to go up and oh it's difficult because the helium was going out so he landed.
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All right, permission to land?
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Yeah, more than 10 000 flights here in the aeroplume
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and zero accident oh you know what I mean it's not a spot on landing
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but I'll take it
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if you can catch the table I'm gonna try there we go catch it got it perfect
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so I will just take the time to link to the blim
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and I will help you to go out it was a
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really good flight I'm half expecting to take the table up with me here she's attached to the ground all right yeah
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Antoine thank you so so much that was incredible thank you
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Vocabulaire et conseils d’expression pour cette leçon
Cette leçon d’expression orale de niveau B2 s’appuie sur la vidéo « How much helium does it take to lift a person? ». Les mots qui reviennent le plus souvent : helium, blimp, wing, aeroplume, carry. Cette vidéo contient 96 phrases et 1284 mots à répéter en shadowing. La partie parlée dure 7:27. Le locuteur parle à un rythme naturel d’environ 172 mots par minute, proche d’une conversation courante. 87 % des mots font partie des 3 000 mots les plus courants en anglais, le vocabulaire est donc facile à suivre.
Vocabulaire clé de cette vidéo
Les 15 mots les plus avancés de la vidéo, avec leur prononciation et leur sens :
| Mot | Prononciation | Sens |
|---|---|---|
| helium nom | /ˈhiː.li.əm/ | hélium |
| blimp nom | /ˈblɪmp/ | ballon dirigeable, dirigeable |
| balloon nom | /bəˈlun/ | ballon |
| float verbe | /fləʊt/ | flotter |
| kilogram nom | /ˈkɪləɡɹæm/ | kilogramme, kilo |
| tether nom | /ˈtɛðəɹ/ | longe |
| litre nom | /ˈli.tɚ/ | litre |
| static adjectif | /ˈstæt.ɪk/ | statique |
| inertia nom | /ɪnˈɝ.ʃə/ | inertie |
| kayak nom | /ˈkaɪˌæk/ | kayak |
| envelope nom | /ˈɛnvə(ˌ)loʊp/ | enveloppe |
| propose verbe | /pɹəˈpəʊz/ | proposer |
| hangar nom | /ˈhæŋ.ə/ | hangar |
| osmosis nom | /ɑzˈmoʊ̯sɪs/ | osmose |
| paddle nom | /ˈpædl̩/ | pagaie |
Les verbes à particule que vous entendrez
| Mot | Sens |
|---|---|
| go out verbe | sortir |
| go down verbe | descendre |
| go up verbe | monter, s'élever |
| go back verbe | rentrer, retourner |
| take off verbe | enlever, ôter |
| find out verbe | découvrir, savoir |
| go through verbe | traverser |
La grammaire de cette vidéo
Les structures que le locuteur utilise le plus, avec les mots exacts de la vidéo :
| Structure | Dans la vidéo |
|---|---|
| Voix passive be + participe passé — l’accent est mis sur ce qui arrive, pas sur qui le fait | be scripted · was built · was used |
| Present perfect have/has + participe passé — une action passée qui compte encore maintenant | I've wanted · have dreamt |
Prononciation à surveiller
Le locuteur utilise 20 contractions et formes réduites, comme I'm, didn't, don't. Prononcez-les sous leur forme courte, telles que vous les entendez.
- Les sons « sh » et « zh »: inertia /ɪnˈɝ.ʃə/, pressurize /ˈpɹɛʃəɹaɪz/, obligation /ˌɑ.blɪˈɡeɪ.ʃn̩/, variation /ˌvɛəɹiˈeɪʃn̩/, conscious /ˈkɑn.ʃəs/
Les sons difficiles pour les francophones :
- /h/ — il se souffle, il n’est pas muet: helium /ˈhiː.li.əm/, hangar /ˈhæŋ.ə/
- /tʃ/ et /dʒ/ — à ne pas adoucir en « ch » et « j »: attach /əˈtæt͡ʃ/, logistics /ləˈd͡ʒɪstɪks/
- /r/ anglais — langue recourbée, sans frotter la gorge: kilogram /ˈkɪləɡɹæm/, tether /ˈtɛðəɹ/, propose /pɹəˈpəʊz/, pressurize /ˈpɹɛʃəɹaɪz/, refill /ˈɹiː.fɪl/
Comment s’entraîner avec cette vidéo
- Écoutez la vidéo en entier une fois sans parler et notez les mots que vous ne connaissez pas.
- Commencez à la vitesse 0,75×, répétez phrase par phrase, puis revenez à la vitesse normale quand cela devient facile.
- Enregistrez-vous et comparez avec l’original, en faisant attention à des mots comme helium, blimp, balloon.
Qu'est-ce que la technique du Shadowing ?
Le Shadowing est une technique d'apprentissage des langues fondée sur la science, développée à l'origine pour la formation des interprètes professionnels. Le principe est simple mais puissant : vous écoutez de l'anglais natif et le répétez immédiatement à voix haute — comme une ombre suivant le locuteur avec un décalage de 1 à 2 secondes. Les recherches montrent une amélioration significative de la précision de la prononciation, de l'intonation, du rythme, des liaisons, de la compréhension orale et de la fluidité.