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Re:Why Bezos’ rocket is unprecedented–and worth taking serio... by kragen on Wednesday September 14, 2016 @09:38PM (#12502721)
You don't want to run the track along the ground? Where then, on a dirigible at the mesopause as suggested in http://postbiota.org/pipermail/tt/2011-August/009613.html?
Re:Why Bezos’ rocket is unprecedented–and worth taking serio... by jsprogrammer on Thursday September 15, 2016 @12:36AM (#12503444)
Bouyant structures could be used, as well as wings, to suspend the track.

You can't run along the ground because you don't want to go too fast through atmosphere.