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I like those ideas for digging a perfectly level tunnel between two distant places ignoring the earth's curvature. You roll "down"and then "up" to travel withou
by beardyw 4y ago
I like those ideas for digging a perfectly level tunnel between two distant places ignoring the earth's curvature. You roll "down"and then "up" to travel without power.
- iso1631 4y agoMaybe if it was a maglev and a completely evacuated tube, but if you could do that you might as well do it on the surface which would be orders of magnitude easier and travel at whatever speed you want for hardly any energy input (as you'd get it back from regenerative breaking at the other end)