Become a fan of Slashdot on Facebook

 



Forgot your password?
typodupeerror
Get HideMyAss! VPN, PC Mag's Top 10 VPNs of 2016 for 55% off for a Limited Time ×
Transportation

Submission + - Ultra-efficient 4,000 mph vacuum-tube trains – why aren't they being built (gizmag.com) 1

cylonlover writes: In the 1800s, when pneumatic tubes shot telegrams and small items all around buildings and sometimes small cities, the future of mass transit seemed clear: we'd be firing people around through these sealed tubes at high speeds. And it turns out we've got the technology to do that today – mag-lev rail lines remove all rolling friction from the energy equation for a train, and accelerating them through a vacuum tunnel can eliminate wind resistance to the point where it's theoretically possible to reach blistering speeds over 4,000 mph (6,437 km/h) using a fraction of the energy an airliner uses – and recapturing a lot of that energy upon deceleration. Ultra-fast, high efficiency ground transport is technologically within reach – so why isn't anybody building it? Gizmag's Loz Blain looks at some of the problems.
This discussion was created for logged-in users only, but now has been archived. No new comments can be posted.

Ultra-efficient 4,000 mph vacuum-tube trains – why aren't they being built

Comments Filter:

The beer-cooled computer does not harm the ozone layer. -- John M. Ford, a.k.a. Dr. Mike

Working...