[Retric]

Yes, who would get into a vehicle when the outside air pressure is below 5 PSI. I mean if the seals broke you could die, and for what to save on fuel costs. What’s next flying through the air in a flying brick instead of the naturally buoyant dirigible, just imagine what happens if the engine cuts out… It’s madness, madness I say!

[emkoemko]

to save on fuel cost but spend a lot of money running pumps to keep a tube near vacuum ? these people are insane... just like building a tunnel to drive a car back and forth and pretend like its some new innovation, if only they knew of trains and trains that move underground in tunnels.

[Retric]

Commercial jet aircraft fly at 30,000 feet ~4psi to save on fuel which also translates to higher speeds, which was the joke. Hyperloop was supposed to be lower at ~0.1 psi mostly to allow for higher speeds.

As to the effort to maintain a low vacuum, that has relatively minimal associated energy costs assuming the track is reasonably air tight.

[emkoemko]

do you know how hard it is so keep vacuum? let alone massive tubes ? imagine just the temperature differences on day to night cycle and the overall length

just look at the energy cost and how much a pump can do in a reasonable time period vs the volume of a large distance tube.