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  • 3/12/2025
Imaginez monter à bord d'un train et atteindre un autre continent en quelques minutes seulement—cela semble relever de la science-fiction, non? Eh bien, des scientifiques travaillent sur un train à tube sous vide futuriste qui pourrait le rendre possible! Ce concept, appelé hyperloop ou vactrain, utiliserait des tunnels hermétiques avec une résistance de l'air ultra-faible, permettant aux trains de voyager à près de la vitesse du son. Cela signifie qu'un voyage de New York à Londres ou de Paris à Pékin pourrait être plus rapide qu'un vol régulier! La technologie est encore en développement, mais si elle fonctionne, elle pourrait changer le voyage à jamais—pas de longs vols, pas de décalage horaire, juste des trajets fluides et ultra-rapides. Qui sait? À l'avenir, vos prochaines vacances pourraient commencer par un trajet en train à travers l'océan! 🚄🌍 Animation créée par Sympa.
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Transcript
00:00You could wake up in New York, grab a bagel for breakfast, jump in a train and, at lunchtime,
00:07you would already be in London, tasting a fish and chips.
00:11What looks like the dream of every tourist could soon become reality.
00:15Currently, the journey between these two cities usually takes 8 endless hours by plane.
00:21But a high-speed train crossing a huge transatlantic tunnel
00:25could make the same journey in just 54 minutes.
00:29The project is to build this train under the Atlantic Ocean,
00:33so that the stations would look like these fashionable underwater restaurants.
00:37Not only would you arrive in Europe in a record time,
00:40but you would not have to suffer the time lag or feel bad because of the turbulence.
00:46So far, this mega-project seems incredible, but can we really achieve it?
00:51Well, it's a million-dollar question.
00:55Actually, it's a 20 billion-dollar question.
00:59It's the cost of this train and its futuristic underwater stations.
01:03It's hard to imagine that anyone has enough money to build it.
01:07That's why specialists thought it was out of the question.
01:11But people started to be optimistic again when Elon Musk made this announcement.
01:16He declared that not only this type of transport was possible,
01:20but that his company could make it a thousand times cheaper than everyone thought.
01:25To travel between New York and London in less than an hour,
01:29the train should reach the breathtaking speed of 4,828 km per hour.
01:35Yes, you heard right.
01:37It's about five times faster than the cruising speed of a commercial plane,
01:41like a Boeing 747.
01:44So, how is this possible?
01:47Well, it's not an ordinary tunnel.
01:50It's an underwater tube, sealed under vacuum,
01:53which eliminates air resistance and allows the train to go at crazy speeds.
01:57And it's not just any train.
01:59It's more of a high-tech aerodynamic capsule
02:03that levitates and moves thanks to magnetic propulsion.
02:06At least, that's what experts think,
02:09this type of technology is already used today with the fastest public train in the world,
02:14the Shanghai Maglev.
02:17This machine, which runs in China, reaches a maximum speed of 299 km per hour.
02:23What's crazy is that these locomotives don't even touch the rails.
02:27They literally levitate about 10 mm from the ground.
02:31This line connects Shanghai to Pudong International Airport,
02:35which allows travelers to avoid traffic jams and get to the airport very quickly.
02:41Thanks to this high-tech technology,
02:44a 31-kilometer journey takes only 8 minutes and 10 seconds.
02:48With a classic train, the same journey would be about 4 times longer.
02:52In 2001, people worked hard for 2 years to build the Maglev train.
02:58And they also spent a lot of money,
03:00because the whole project cost more than a billion dollars.
03:03Despite this exorbitant initial price,
03:06maintaining this service line is not as expensive as it seems.
03:09Its operation is in fact cheaper than that of ordinary trains.
03:13As the Maglev does not touch the rails,
03:15it uses much less and the maintenance costs are much lower.
03:19In addition, its propulsion system is of impressive energy efficiency.
03:24As we have already mentioned, this is the fastest train in the world.
03:28But China does not intend to stop there.
03:31It should soon break its own record,
03:33after having already unveiled the prototype of a new generation train, the CR450.
03:39During tests, this real silver rocket reached speeds of up to 452 km per hour.
03:46If this project is realized,
03:49that is, if people really start using it on a daily basis,
03:52it will change the game for high-speed travel.
03:56It could reduce the distance between Beijing and Shanghai to less than 3 hours.
04:00It is one hour less than the time that the high-speed train currently uses.
04:04The team now has to perform some tests
04:07to ensure that it meets all the standards necessary for commercial operation.
04:12This car looks like a Batmobile,
04:14and it is probably just as powerful.
04:17Discover the incredible Konigsegg Jesko Absolute.
04:21Its elegant and futuristic design is not only there to look good.
04:25Each detail of this machine was designed to melt the air with precision,
04:30reduce drag and turbulence,
04:33while improving its performance at high speed.
04:37Experts have carried out the first computer simulations,
04:40and the Jesko Absolute has reached a staggering speed of 501 km per hour.
04:46But the team is convinced that it can go even faster.
04:50This beast is getting closer to the cruising speed of small jets.
04:53And it is for this reason that it has broken all records
04:56and has become the fastest car in the world.
04:59Visiting the Coventry Museum of Transport in England,
05:03you will come face to face with a terrestrial vehicle
05:06that looks more like a rocket than a car.
05:09I present to you the Bloodhound LSR.
05:12It has been exhibited since 2019.
05:14During tests in the Kalahari Desert in South Africa,
05:17it reached 1010 km per hour.
05:19But the team at the origin of this vehicle is not yet satisfied
05:22and is 99% sure that it can go even faster.
05:26It therefore plans to bring it back on the track soon
05:29in order to beat another record.
05:32But there is a hitch.
05:34The team is still looking for an intrepid and competent pilot
05:37capable of managing speeds higher than 1290 km per hour.
05:42And before you rush to take up the challenge,
05:45let me remind you that it will take more than courage.
05:48You will also need an important sponsorship contract
05:51because bringing this vehicle back on the track
05:53and exceeding this speed record on the ground
05:56could cost around 15 million dollars.
05:59If you are curious to know the fastest jet planes in the world,
06:03do not look any further.
06:05Here is the North American X-15,
06:08a legendary aircraft that has flown for nearly 10 years
06:11and established a record of the unofficial world speed
06:14of 7270 km per hour.
06:18This machine is so impressive
06:20that it even reached space on board
06:22during its test flights in the 1960s.
06:25Yes, it approached the territory of astronauts.
06:28To put things in perspective, commercial aircraft,
06:32those we take regularly,
06:34generally fly at altitudes up to 12,800 meters,
06:38but the X-15 is mounted at more than 106,500 meters.
06:42Now, imagine that you fly faster than ever,
06:45flying in the sky at more than five times the speed of sound.
06:48This is exactly what NASA did with this revolutionary aircraft,
06:52known as X-43A.
06:54This aircraft is powered by a stator reactor,
06:57which means that it is equipped with an engine
07:00that works at supersonic speed.
07:02It has no mobile parts like conventional jet engines,
07:05such as turbines.
07:07Instead, it uses the plane's own speed
07:10to push air into the engine.
07:12The air is then compressed, or crushed,
07:15by the fast movement of the plane,
07:17then mixed with fuel and burned,
07:19which produces a thrust.
07:21For the uninitiated,
07:23this may seem crazy, or even dangerous.
07:25In fact, it should be mentioned
07:27that the first flights of the X-43A
07:29were not at ease.
07:31The first attempt took place in June 2001,
07:33but the plane was destroyed
07:35after the support rocket became uncontrollable.
07:38Fortunately, the second and third attempts
07:41were a huge success,
07:43with record flights entering history.
07:46I know that elevators are not the first thing
07:49that comes to mind
07:51when we think of ultra-fast means of transport.
07:54But it is only thanks to ultra-modern elevators
07:57and at high speed
07:59that skyscrapers as high as Burj Khalifa
08:02and Taipei 101 have become accessible.
08:05One of the fastest elevators in the world
08:08is located in the Shanghai Tower, in China,
08:11which has 128 floors.
08:13To quickly transport people from the ground floor
08:16to the top of the building,
08:18the elevator must move at an incredible speed
08:21of 20 meters per second.
08:23It is faster than Usain Bolt at its maximum speed
08:26and barely slower than a cheetah.
08:28But it is still super fast,
08:30about five times faster than the elevators
08:33we use in most buildings.
08:35So, if you are afraid of heights,
08:37and cramped spaces,
08:39we suggest you stay on the ground floor.

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