I predict that someone will figure out how to efficiently make synthetic fossil fuels using other forms of energy long before fossil fuels run out, but maybe not before global warming is out of control. I didn't realize we still had fast cheap air transport. --ms On 17-Aug-13 12:46, Warren D Smith wrote:
Considering the miserable USA cannot even create a conventional-wheeled high speed rail line (suitable straight-enough track too costly), it seems absurd to ask for a vactrain (way more costly, plus even greater straightness demands).
The "ballistic" plan seems also absurd (high G forces, plus what if it misses the target a bit?).
Maybe those who like these should consider the Jules Verne plan, where we tunnel straight thru the earth to Australia, evacuate tunnel, and then gravity supplies almost all necessary forces. "Simple."
I believe that we're going to run out of fossil fuels whereupon fast cheap air transport may vanish forever.