Quote:
|
All the tube needs is an automatically adjustable girder system to compensate for the deviations and some extra space to allow for those adjustments.
|
A rigid but flexible tube? 2500mph is 3666ft/sec. Changes in grade or curves would be problematic.
The Moon would be the place for a space elevator. No atmospheric drag, or terrorists.
The earliest mention I remember of underground tunnels had them on a catenary curve. Instead of mag-lev, you were to just drop them straight down the hole and let gravity do the work.