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NITESSH
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re: NYC to London on a 4,000 mph vacuum train
NITESSH   7/17/2012 1:45:40 AM
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i would like to ask:- "what is the problem in present design so that we can have a capsule that can accomodate just people" there is vaccum in tunnel we can have even a bigger capsule plz answer in basic terms as i am just a graduate student

Bert22306
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re: NYC to London on a 4,000 mph vacuum train
Bert22306   7/17/2012 12:51:24 AM
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Sounds really cool. I had read about this sort of concept. And a less credible idea, but intriguing anyway, drilling straight down through the earth to the other side, and using only gravity to provide the needed acceleration and deceleration. Comment: 1g refers to acceleration rather than force. It's 9.8 meters/sec/sec, or 32 ft/sec/sec. It should take just over 3 minutes of constant 1g acceleration to reach 4000 mph (=5867 ft/sec), from a standing start. The force required to achieve that depends on the mass of these capsules. I would think that any small shift in the soil surrounding these tunnels would, uuh, really spoil your day, if you're a passenger.

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