[ExI] global warming again.
stefano.vaj at gmail.com
Thu Mar 19 20:45:11 UTC 2009
On Thu, Mar 19, 2009 at 8:22 PM, Keith Henson <hkeithhenson at gmail.com>wrote:
> Space based solar provisionally looks like the best idea. Going to
> much higher exhaust velocity than you can get with chemical fuels for
> the second stage seems to be one way to get the cost to GEO below
> $100/kg. That's low enough for penny a kWh electricity and synthetic
> liquid fuels for a dollar a gallon, but it only works for a million
> tonne per year traffic model.
What about a Project Orion vehicle?
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