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The Hyperloop: BUSTED

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james_s:
I have not looked into the hyperloop in detail but it doesn't immediately jump out at me as bullshit, I see no over-unity claims, no magic required. Given unlimited resources I have little doubt it could be made a reality. Unlike aircraft, capsule weight is of relatively little importance, the thing could be incredibly stout and sturdy

Now whether or not it ever becomes feasible to actually build the thing I don't know but the safety aspect doesn't worry me too much. Somewhere between 100-150 people die every single day in car accidents just in the US, rapid transportation has inherent risks. Yes a hyperloop accident could be spectacular with a lot of deaths but so is an airliner crash and that doesn't stop us from flying. I suspect the barrier is going to be almost purely financial rather than engineering. Building an entire new infrastructure of this sort is incredibly expensive, it pretty much has to blast straight through to be practical.

mtdoc:

--- Quote from: GeorgeOfTheJungle on January 16, 2018, 10:09:34 pm ---Is it ok to increase both (deficit and debt) to spend in this, now?

--- End quote ---

Perhaps not, but better this than spend $700 Billion on the military .


--- Quote from: james_s on January 17, 2018, 01:36:56 am ---I I suspect the barrier is going to be almost purely financial rather than engineering. Building an entire new infrastructure of this sort is incredibly expensive, it pretty much has to blast straight through to be practical.

--- End quote ---

Exactly! It  is the financial and political realities that will likely prevent long distance hyperloop transport in the USA, not the engineering.  While there are certainly engineering challenges, I’ve read enough back and forth between the “busted!” proponents and real Engineers with experience and expertise in the relevant areas to convincingly debunk the “debunkers” IMHO.

EEVblog:

--- Quote from: nctnico on January 16, 2018, 11:15:11 pm ---A first simple check is to see if a project is done by multiple companies (in parallel) or just one and where the funding is coming from.

--- End quote ---

Another first simple step is to stop and think why no one has done this old idea before:

Has there been some radical breakthrough in maglev technology? No.
Has there been some radical breakthrough in ridiculously large scale vacuum tunnel technology suitable for human carriage over hundreds of km? No.
Has there been some other radical breakthrough in the transport market space? No.
Has there been some other breakthrough in cost reduction in anything to do with this? No.

Has there been some huge hype from the most influential tech person on the planet? Yes.
Does this hype attract bandwagon chasing money? Yes.

technix:
I would still prefer the hourly high speed trains that runs at 20% below its maximum test speed. A lot safer and likely a lot cheaper. Yes I am talking about the China Railway High-speed trains "Rejuvenation" that runs between Shanghai and Peking.

HalFET:

--- Quote from: EEVblog on January 16, 2018, 09:44:56 pm ---
--- Quote from: nctnico on January 16, 2018, 03:00:36 pm ---Still it is not undoable.

--- End quote ---

Solar roads, uBeam and Energous are not "undoable" either.


--- Quote ---My point is that all these 'debunking', 'busted', etc videos about big projects are just scaremongering, FUD and fake news (as it is called nowadays).

--- End quote ---

No, they are calling out obvious impractical bullshit.


--- Quote ---so how hard can it be to run a pod through a vacuum tube? Try it at least!

--- End quote ---

You'll see...

--- End quote ---

I'm mostly curious about energy efficiency, what'd take less energy:

* Vacuum pumps running 24/7 to keep an inherently leaky system at low air pressures.
* Doubling the speed of high speed maglev-based "rail".I would expect there's a point where they meet, and I'm not so sure the current speeds are there already. Especially over long distances it would most likely be more energy efficient to run the second option.

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