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submitted 1 year ago by L4s@lemmy.world to c/technology@lemmy.world

Hyperloop One to Shut Down After Failing to Reinvent Transit::The company is selling assets, laying off remaining employees.

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[-] Mojojojo1993@lemmy.world 3 points 1 year ago

So Japan has had maglev since the 90s. Explain?

[-] Lanusensei87@lemmy.world 44 points 1 year ago

Their Maglevs are not Hyperloops...

[-] Mojojojo1993@lemmy.world 3 points 1 year ago

I'm aware. That wasn't the question

[-] Lanusensei87@lemmy.world 50 points 1 year ago

It is the answer to your question tho. Maglev is feasible, Hyperloop, not so much.

[-] jonne@infosec.pub 16 points 1 year ago

And even maglev is barely done because it's so expensive to build. Hyperloop is wrapping that same maglev train into a tube that should maintain a vacuum for kms on end, and pretty much every failure mode would end up being genuinely catastrophic.

[-] kittyjynx@lemmy.world 2 points 1 year ago

Plus you would have to armor the whole thing and spend a bunch on security because one guy with a .50 rifle or some explosives could destroy a whole section and close the whole thing by punching one hole in it.

[-] jonne@infosec.pub 1 points 1 year ago

Haha, yeah. Remember the chaos when militia guys started shooting at transformers in substations? Every hick with a gun would be shooting at it just to shut it down.

[-] WhatAmLemmy@lemmy.world 27 points 1 year ago

They gave you the only answer your stupid question deserves.

[-] Mojojojo1993@lemmy.world 1 points 1 year ago

Oh name calling. How very thoughtful of you.

Clearly very smert

[-] Maggoty@lemmy.world 27 points 1 year ago

Maglev=! Vacuum. Elon promised an existing technology inside a vacuum.

[-] nelly_man@lemmy.world 5 points 1 year ago

The vacuum is the hard part, not the maglev. You would need to enclose the entire track inside if a vacuum, and that world be ridiculously expensive and practically impossible with current technology. It's already very expensive to build a tunnel for a train, which is why they are avoided if possible. But this would need to be all tunnel that is air tight, so even more expensive than regular train tunnels.

To put it into perspective, the current largest manmade vacuum chamber is at a NASA research facility in Ohio. It's a cylinder with a diameter of 100 feet and a height of 122 feet. If this were laid on its side, about 1.5 New York subway cars could fit inside. The largest vacuum ever made can barely fit the vehicle inside, let alone allow it to travel between two different places where the extra speeds would be warranted.

[-] Mojojojo1993@lemmy.world 1 points 1 year ago

That kinda puts it in perspective. What about particular vaccum? Or just where the tracks meet the train. That's the only bit with drag ?

[-] OneCardboardBox@lemmy.sdf.org 1 points 1 year ago

The drag is air against the whole body of the train, so you need vacuum everywhere.

Assuming that you could build such a big vacuum there would be safety concerns. What if there's an accident in the tube? Does everyone in the train depressurize and die? Assuming people can survive and get out of the train car, now they're in a tube that's 100 miles long. How can you build emergency exits in a system designed to be as airtight as possible?

[-] Mojojojo1993@lemmy.world 1 points 1 year ago

Of course. What a thiccy

[-] Mojojojo1993@lemmy.world 1 points 1 year ago

That kinda puts it in perspective. What about particular vaccum? Or just where the tracks meet the train. That's the only bit with drag ?

[-] Mojojojo1993@lemmy.world 1 points 1 year ago

That kinda puts it in perspective. What about particular vaccum? Or just where the tracks meet the train. That's the only bit with drag ?

this post was submitted on 22 Dec 2023
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