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Comment on The Hyperloop was always a scam

There wasn’t going to be any air resistance. They were just going to build a vacuum chamber 1000 times larger than the biggest one ever engineered, then contain it in a thin metal tube snaking hundreds of miles across the heat of the California desert. So simple. /s

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Thorry84@feddit.nl ⁨10⁩ ⁨months⁩ ago
Good thing California is geological stable, otherwise it would never have worked… /s

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blazera@kbin.social ⁨10⁩ ⁨months⁩ ago
Right, that was the whole point. I think folks arent appreciating air resistance. The ISS is an example of what vehicles are capable of without it. Speeds incomparable to anything on earth, with little fuel usage. Its the largest source of inefficiency in travel. And the engineering science of reducing it is wholesale a scam for people.

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- thorbot@lemmy.world ⁨10⁩ ⁨months⁩ ago
  Whoooosh
  
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  - misophist@lemmy.world ⁨10⁩ ⁨months⁩ ago
    No, without air resistance , you don’t get that sound.
    
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  - blazera@kbin.social ⁨10⁩ ⁨months⁩ ago
    Yeah i seen the rest of it, i was short on time. Thats not how engineering tubes works, we use them because you can add as much length as you want, the balancing of pressure forces occurs cross sectionally. A 2 foot pipe carrying 100 psi is experiencing the same stresses as a 2 mile pipe at 100 psi. You might as well be adding a /s to the idea of distributing water through pipes.
    
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    prime_number_314159@lemmy.world ⁨10⁩ ⁨months⁩ ago
    Very long pipes use expansion/contraction sections that may not be possible for a vacuum sealed system that has to be incredibly straight to allow the passage of a train, and can flex pretty significantly for earthquakes, seasonal temperature changes, etc.
    
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- michaelmrose@lemmy.world ⁨10⁩ ⁨months⁩ ago
  The ISS travels at a constant speed in relation to the earth. People have to get on and off a train
  
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  - blazera@kbin.social ⁨10⁩ ⁨months⁩ ago
    Yes, acceleration is a thing, but trains a)reach a top speed and spend a lot of fuel maintaining it, and b)reaches much, much lower top speeds, with any effort to increase it requiring exponentially more fuel to reach and maintain. Air resistance is an absurdly important factor to travel efficiency.
    
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- HaywardT@lemmy.sdf.org ⁨10⁩ ⁨months⁩ ago
  I think a better example is airplanes. You run at high altitudes to increase efficiency due to reduced atmosphere.
  
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