Superconducting Train Principle FTW! [Video]

Submitted by: Tearon 7 years ago in Entertainment

Holy Crap! This technology is flipping sweet! When are we going to be using it on our cars?
There are 80 comments:
Male 213
Magrail ftw.
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Male 62
Yeah, I agree. I wish I knew what he was saying so I could better understand what was going on.
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Male 1,598
That was pretty interesting... I wish it had subtitles tho :/
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Male 12,365
[quote]people are too smart. the comments made me feel stupid. i thought it was pretty much awesome.[/quote]

It`s education, not intelligence. I`m 40. You`re 13-17. I`ve had a lot more time to learn bits of stuff.

I think it`s awesome too.

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Male 569
people are too smart. the comments made me feel stupid. i thought it was pretty much awesome.
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Male 215
Witchcraft
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Male 48
You guys is smart!
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Male 12,365
Ah, I think I see where I was wrong about the Meissner effect.

It`s not a straightforward force of repulsion between the superconductor and magnet. It`s more a maintaining of the positions of them relative to each other when the effect occured, as if they were attached by a sci-fi tractor beam. The relatively weak gravity of Earth wouldn`t be enouhg to overcome it.

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Female 246
it is the meissner effect.
why? because of flux pinning (a known flaw in superconductors)
http://scienceblogs.com/startswithabang/...
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Male 12,365
[quote]this is not diamagnetic levitation. it`s the Meissner effect.[/quote]

The Meissner effect *repels* a magnet. It can cause a magnet to levitate only when the magnet is *directly above* the object cooled enough to show the Meissner effect.

In that case, the forces of gravity and the repulsion are in opposite directions and can therefore result in a zero net force.

If the Meissner effect strip is rotated, the force of gravity and the force of repulsion will not be directly opposing, resulting in a net force sideways. That will move the magnet down the angled strip like a wheel rolling down a hill, then straight down when it`s passed the edge of the strip.

If the strip is rotated above the magnet, the force of gravity and the force of repulsion are in the same direction - the magnet would accelerate downwards faster than under gravity alone.

This can`t be just the Meissner effect.

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Male 12,365
[quote]It`s a superconducting magnet. Not the liedenfrost effect.

I didn`t think someone who would know what the liedenfrost effect was would not know about superconducting magnets. Guess I was wrong.[/quote]

Oh great one, please enlighten this lowly one who seeks to bask in the light of your wondrous wisdom:

If this is simply maglev, how does it work regardless of whether the track is above or below the cup?

You are indeed wrong. You are wrong in that you are trying to patronise the wrong people and in that you`re doing it in a very clumsy way, making it very clear that you`re talking rubbish.

Did you not even think to read my prior posts in which I refered to the Liedenfrost effect, the use of electromagnetism to levitate objects and the effect of superconductivity in electromagnets before proclaiming that I couldn`t know about them? Are you arguing that I wrote them while in a trance and channeling another spirit?

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Male 25,416
Seen it again, still cool!
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Male 20
UFO UFO!!!!

i saw it i aint crazy :P

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Male 1,646
its cool and all. but there is no point of propulsion, so that would use more energy.. and we would have to have liquid nitrogen. and on top of it we would need roads or entire train tracks laid out with those metal bricks... interesting, but not practical.
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Male 288
Instead of gas we could buy liquid nitrogen!!! YAHHH... fail.
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Male 322
This could be patented into a really awesome bedroom decoration.
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Male 16
It`s a superconducting magnet. Not the liedenfrost effect.

I didn`t think someone who would know what the liedenfrost effect was would not know about superconducting magnets. Guess I was wrong.

Here`s a superconducting magnet for dummies video:
http://www.youtube.com/watch?v=Z4XEQVnIF...

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Male 9
this is not diamagnetic levitation. it`s the Meissner effect. a superconductor cooled below it`s critical point (in this case using liquid nitrogen) responds to magnetic fields in this way
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Male 73
lol yeah that was cool.
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Male 12,365
Caveat:

Maglev can work on attraction, but not with two flat surfaces as shown here.

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Male 12,365
[quote]Hmm, wouldn`t LIQUID nitrogen fall out from the cup if it was still in there (same goes for nitrogen in gas form too.)[/quote]

Lquid nitrogen in the cup would fall out (gaseous nitrogen wouldn`t), but there could be some between the cup and track.

[quote]it would have to create a CONSTANT force[/quote]

That`s your best argument. The Liedenfrost effect lasts for seconds. Perhaps some form of delivery system in the cup, replenishing the liquid nitrogen between cup and track.

[quote]wait a minute...What`s keeping it on track? Is nitrogen magnetic?[/quote]

Nitrogen isn`t magnetic, but the cup could be. That could attract the cup and track with a force greater than gravity, so the cup would hang under the track, against gravity. You can easily hold something against gravity with magnets.

This is the strongest argument against it being maglev - since that works on magnetic repulsion, not attraction, there`s no way it can work inverted.

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Male 69
cjanota, spot on!
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Male 69
Hmm, wouldn`t LIQUID nitrogen fall out from the cup if it was still in there (same goes for nitrogen in gas form too.)

Expanding gases cannot be behind the effect here since it would have to create a CONSTANT force in relation to magnetic force to keep it floating? Also to get the Liedenfrost effect the cup should have a hole in it to get the gas between the track and what ever is keeping it on track.... wait a minute...What`s keeping it on track? Is nitrogen magnetic? Well, geniuses.

There`s a black disc underneath the cup, maybe the answer is somewhere there?

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Female 3,828
wow this is cool. i oubt it will be used for cars etc, but a skateboard or scooter that hovers would be freaking sweet
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Male 1,256
This is beautiful. It would be so cool to ride a hoverboard in a big skatepark made that was equipped for that! Think about how amazing that would be!!!!
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Male 12,365
If it is the Liedenfrost effect, the cushioning occurs because the liquid nitrogen *doesn`t* evaporate. The part in direct contact with the track boils instantly and forms an insulating layer that temporarily stops the rest of the liquid nitrogen from boiling.
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Male 694
this is awesome lol
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Male 12,365
The Liedenfrost effect, if I recall the name correctly. Most famously used for dunking your hand in boiling lead without being burned. Room temperature would be hot enough for liquid nitrogen to show that effect.

I was looking at the central strip that the object was hovvering above and thinking that was magnetised for maglev. Which wouldn`t explain the upside-down thing.

Your explanation makes more sense now that I think about it. A strong enough magnetic *attaction* between the object and the track would keep the object from falling during the upside-down thing, with the Liedenfrost effect holding it off the track. That would also explain the clear disc used as a spacer - the Liedenfrost effect requires a gap.

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Female 1,112
So correct me if I`m wrong, but isn`t this just a symptom of the same sort of effect demontstrated by those people who pour liquid nitrogen on their hands? I mean, it "levitates" because it is cushioned by the gases of the evaporating nitrogen right? And the upside down effect is because there is cushion between the magnets? I`m not a chem major so help me out guys.
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Male 287
KILL IT WITH FIRE
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Male 985
BURN THEM
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Male 15,832
yayforme "Ahhh, maglev trains. How many times I`ve tried to build a model and failed miserably... (just one, actually)"

Were you using high-temperature superconductors, liquid nitrogen, and neodymium magnets? If not, that might explain why you failed. ;-)

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Male 79
WITCH
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Male 156
Ahhh, maglev trains. How many times I`ve tried to build a model and failed miserably... (just one, actually)
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Male 327
That is sweet as hell, although I`d hate to get in a traffic jam, upside down...Everyone on the road would be getting nose bleeds and poo
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Female 246
ironic... I was JUST talking to my teacher today about the Meissner Effect and how amazing it is.
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Male 2,440
Everyone and their mother has seen this type of experiment.
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Male 670
The idea has been around for quite some time, but I`ve never seen it levitate upside down.
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Female 668
BLACK MAGIC!
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Female 1,306
Everyone`s like "ooh, trains, technology"

UHH, I`M THINKING OF THE ROLLER COASTER OPPORTUNITIES. Upside-down leviation magic? Y/Y?

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Male 339
Awesome video, but I wonder if this can practically be implemented in any way though. Think about it, the track and train need to be cooled to well below freezing with liquid nitrogen. That`s pretty expensive, even considering if they could somehow insulate the whole system well.
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Male 139
I knew supercooled superconductors would levitate above magnets, but I didn`t know they were attracted and repelled at the same time. Pretty badass.
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Male 14
I watched this and thought `But I`m not black and I can`t fly and my magic pixie dust is really just cornstarch` and then I thought `Very nifty!!!`
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Male 670
this may be the one time it is excusable to type in all caps

HOLY drat DID YOU GUYS dratING SEE THAT poo WTF JUST HAPPENED!?!?!

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Male 2,050
this has to be the best video ever posted on iab.
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Female 96
i think i may have just poo my britches.
that`s some intense stuff.
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Male 92
Phosphoreign... you can actually dip a finger into very shallow liquid nitrogen briefly. It is so cold that anything room temp causes evaporation and pushes the liquid away from your finger, so it doesnt touch/freeze it. These guys never touch it longer than a second
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Male 2,788
"I`m not quite sure on this one, so call this a suggestion... don`t start flaming at me... but wouldn`t the guys hands get cold burns from being that close if not touching the rails he just poured liquid nitrogen onto?"

He didn`t touch the part where the liquid nitrogen was poured on

but even if he did, it`d only be really really cold..

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Male 10,440
You can`t get enough superconductors.
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Male 22
Holy crap!
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Male 308
I`m not quite sure on this one, so call this a suggestion... don`t start flaming at me... but wouldn`t the guys hands get cold burns from being that close if not touching the rails he just poured liquid nitrogen onto?
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Male 2,868
I`m sorry, I don`t understand Mexican.
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Male 1,403
shunpo u beat me to it
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Male 12,365
[quote]If this would be used on a car how do I break?[/quote]

i) Airbrake.
ii) Linear induction motor. This is what`s usually used to move the train forwards, but you can easily reverse the direction of force so that it`s braking rather than accelerating.

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Male 2,220
"The maglev train speed record is 357mph."

361mph - Japanese Maglev.
357mph French Lie.

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Male 12,365
It`s not new tech - there was a maglev train running in England in 1984.

It`s just not practical or cost-effective. You can`t efficiently supercool miles of track and the amount of electricity required to maglev a train without supercooling to get superconductivity is farcical. It`s insanely expensive to build and insanely expensive to run. Every maglev train loses money hand over fist. The benefits are nowhere near as great as the costs.

If someone succeeds in developing a material that superconducts at a much higher temperature, maglev might become practical. There would be some use for trains that travel completely smoothly at several hundred mph, but the track would be very vulnerable and any crash would be catastrophic.

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Male 12,365
[quote]I need that explained to me very, very slowly - but I like it![/quote]

As far as I can tell, this is an example of magnetic levitation - maglev.

Like poles of magnets repel each other - you might well have messed about with that yourself with small magnets.

So you have a magnetised track and a magnetised object - if the force of the repulsion is greater than the force of gravity on the object it will hover above the track. The stronger the magnets, the greater the weight that can be levitated.

It`s done with electromagnets. The strength of them depends on the conductivity of the material and the amount of electricity used. The coolant they pour in (probably liquid nitrogen) cools the material enough for it to superconduct, greatly reducing the amount of electricity used.

Levitating objects have no friction with the ground, so they can be moved very efficiently. The maglev train speed record is 357mph.

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Male 140
two problems with mag lev... magnets and electricty are expensive as heck... And keeping things cold enough to superconduct takes lots of energy.
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Male 141
If this would be used on a car how do I break?
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Male 1,381
all I thought of was:

"But I am le tired..."

XD

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Male 814
WOAH!!! so that`s how criss angel does it!!!!!!
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Male 373
ELSombrero, another problem might be that electronic equipment would be unusable after being exposed to the road/vehicle`s strong magnetism
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Male 1,122
For those of you who don`t know, this is the guiding principal behind the bullet train.
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Male 54
Science FTW!
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Male 716
One major problem with using this on cars (description reference) is that the car would only work on a road... which might be a bit of an inconvenience (Like a deer is in the road and you want to swerve into the open field but cant)
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Male 1,354
Wow that is older than sin.
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Male 18
@Frogtango: Close. It`s caused by cooling a superconductive material. That is to say, a material which is not necessarily conductive at normal temperatures but when cooled becomes more conductive than most substances.
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Male 193
thats awesome! bravo frenchies!
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Male 2,076
no. flipping. way.

O_O

-.O

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Male 1,718
It is to do with supercooling a magnet. When you pour that liquid (whatever coldass gas) over the magnet, it`s magnetic pull and fields spazz up.
For the real kinda explanation
I cant link it properly cause of spaz computer
http://www.youtube.com/watch?v=Z4XEQVnIF...
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Male 3,364
go to you tube, and search "maglev" trains or "worlds fastest trains" and you`ll see how this is applied to real life. Vey cool!
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Male 964
Wait...wut?
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Male 172
This is super awesome for umm table hockey? That`s how you call it?
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Male 2,034
The major hurdle here is keeping something that cold in a practical use. Yeah it looks cool in a lab setting, but the real world...

That`s liquid nitrogen for those of you wondering.

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Female 4,039
I need that explained to me very, very slowly - but I like it!
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Male 25,416
That is so cool, dont know what it was exactly!
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Male 56
thats drating awesome
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Male 56
wat.
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Male 147
Link: Superconducting Train Principle FTW! [Video] [Rate Link] - Holy Crap! This technology is flipping sweet! When are we going to be using it on our cars?
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