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I don't know about Virgin system but Elon Musk original Hyperloop paper clearly stated: > The problem with this approach is that it is incredibly har
by nickik 6y ago
I don't know about Virgin system but Elon Musk original Hyperloop paper clearly stated:
> The problem with this approach is that it is incredibly hard to maintain a near vacuum in a room, let alone 700 miles (round trip) of large tube with dozens of station gateways and thousands of pods entering and exiting every day. All it takes is one leaky seal or a small crack somewhere in the hundreds of miles of tube and the whole system stops working.
> However, a low pressure (vs. almost no pressure) system set to a level wherestandard commercial pumps could easily overcome an air leak and the transport pods could handle variable air density would be inherently robust.
- bigbubba 6y agoA modest low pressure in the tube would become high pressure in the tube when you start pushing a piston (Hyperloop car/capsule) down the tube. Where would all the air piling up in front go? This is why the original concept drawings had large fans on the front of the cars, however this concept seems to have been abandoned, leaving this problem unsolved.
- nickik 6y agoThe capsule pumps the air behind itself. That is correct. However this is is Virgin Hyperloop. Its very different from Elon Musk Hyperloop design. No evidence that Elon Musk changed his design. We know he is still on his back burner. His change seems to be more about moving to tunnels rather then tubes.
- carabiner 6y agoThe air flows around the train, same as a subway. The low-pressure tube still maintains an lower net pressure and corresponding reduction in a drag vs. a tunnel with standard temperature and pressure, even if there are variations in static pressure along the length of the tube.