Hyperloop: Difference between revisions

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Partial revert. Restored simpler link to Shanxi Province, as per WP:REDIRECT.
Theory and operation: cr: there's no contrast between "partially evacuated tubes" and 1/1000 of an atomosphere.
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[[File:Hyperloop.jpg|thumb|A 3D sketch of potential Hyperloop infrastructure. The steel tubes are rendered transparent in this image.]]
 
The much-older [[vactrain]] concept resembles a [[high-speed rail]] system without substantial [[Drag (physics)|air resistance]] by employing [[maglev|magnetically levitating]] trains in [[vacuum|evacuated]] (airless) or partly evacuated tubes.; Howeverhowever, the difficulty of maintaining a vacuum over large distances has prevented this type of system from ever being built. By contrastSimilarly, the Hyperloop alpha concept was to operate at approximately {{convert|1|mbar|Pa|spell=in|lk=on}} (roughly one thousandth of an atmosphere) of pressure, andbut requireswould require compression of the tiny amount of remaining air for levitation.<ref name="nova20130813"/>
 
===Initial design concept===