Re: Burt Rutans plans for a manned mission to Mars

There is one potentially cheap way of getting into orbit that is just
about possible to achieve with current materials and that is the
rotating space elevator. This requires a long cable approx 1000km
length attached to either a large mass at one end in low Earth orbit or
twice the length without the mass (double ended).
This cable rotates at such a speed that even though at the Cg is at
orbital speed the lower end is travelling at a much slower speed
allowing sub-orbital craft and even potentially aircraft to transfer
mass which will then be transported upto orbital speed by the cable.
Powering the whole cable, could be achieved by electro means or plasma
drives.

This will be built within the next decade I believe.

.

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