Viewing a single comment thread. View all comments

Reddit-runner t1_j8h2j8q wrote

Reply to comment by Sodium_Showercurtain in 7 international companies have teamed with the EU to form the International Hyperloop Association, the industry's first trade body. by lughnasadh

While I also don't think any Hyperloop system can operate on a sensible financial basis, this "this vacuum tube is impossible" claims lack any base in reality.

Physically such a vacuum is absolutely possible.

But you always will get people who fall for the populist claim that the thermal expansion of such a long tube would destroy it/make it impossible.

In pipelines you work around this problem by having Omega-joints. In a Hyperloop this obviously doesn't work. But bellow-joints also exist.

You will find many "Hyperloop destroyed" videos online which colourfully point out the first part, but purposefully let out the second part with the solution.

0

Weltkaiser t1_j8hal4s wrote

Creating such a vacuum is not the issue. But keeping it stable over a long period of time without using vast amounts of energy is impossible. At least as long as materials have certain properties, maintenance is a thing and you apply real world physics. Why do you have to focus on that one metric for you proof btw. there are hundreds of scenarios that make this unviable other than the type of joints you're using.

3

Reddit-runner t1_j8hd4x9 wrote

>Why do you have to focus on that one metric for you proof btw. there are hundreds of scenarios that make this unviable other than the type of joints you're using.

Because as you have pointed out there are real engineering challenges you can talk about.

So why lie about a benign problem that already had a simple solution?

That's what I take issue with.

0

Weltkaiser t1_j8hguoe wrote

That one flaw in some videos you watched doesn't render the entire criticism invalid.

1