this post was submitted on 08 Sep 2023
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Still means 0.5 bar overpressure if something breaks, which is deadly. Also the proposed pressure for the Hyperloop was 0.1 atmospheres iirc. If there is a weakness in the tube it will fail catastrophically and a pressure wave kills anyone in it. Watch the video where the mythbusters implode that huge tank.
You basically bring a lot of the problems with space travel down to earth.
"vacuum tube doesnt automatically mean conditions on a spacecraft in sci-fi "
Half atmosphere is less pressure difference than normal passenger planes.
The direction of pressure difference is important
Its the same? Pressurized cabin in a lower pressure environment
The problem is the high pressure environment outside the low pressure environment