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One of Maglev's biggest problems is that it requires a great deal of power to keep at high speed because of atmospheric drag; Hyperloop's evacuated tube mitigat
by nickff 10y ago
One of Maglev's biggest problems is that it requires a great deal of power to keep at high speed because of atmospheric drag; Hyperloop's evacuated tube mitigates this issue. Hyperloop is also faster than most Maglev concepts, and having the tube helps to guide the vehicle (without requiring complicated curve construction).
- SteveNuts 10y agoHow much energy does it cost to evacuate many miles of tubing?
- snuxoll 10y agoDepends on how much atmosphere is leaked back into the tunnel and how much vacuum you need. The former is a much bigger issue with the concept, if it takes a lot of energy to evacuate the tube once it's not too big of an issue, but ongoing maintenance of the vacuum would be problematic with leaky or damaged seals over the lifetime of the tunnel. Of course, most of the vacuum tube proposals require a vacuum of something like 0.001 atmospheres, which is incredibly problematic as well....
- nickff 10y agoQuite a bit, but the power does not have to be stored aboard the vehicle, or transmitted to it while the vehicle is travelling at hundreds of kilometers per hour.
- throw12032121 10y agoEvacuated underground maglev has been proposed at least for 30 years now. I've first read about it in a popular magazine. Speed figures up to 10000 km/h were thrown around (assuming near perfect vacuum).