[ExI] Low hanging fruit
hkeithhenson at gmail.com
Thu Jun 23 05:17:01 UTC 2011
Once you bite the bullet and decide that in the context of $50 B worth
of Skylons for a power satellite project, another $20-30 B for beamed
energy seems downright reasonable.
There are two approaches that seem to make sense splicing into the 30
ton near LEO and 20 ton (60 t/hr) at GEO end of the pipeline.
First is to power a hydrogen burner similar to Skylon on up to LEO
with a combination of ground power and laser coming down from GEO.
The other is a much smaller vehicle air dropped from 10 km and powered
into LEO by ground based beamed energy.
I worked up a preliminary spread sheet for the first if anyone wants to see it.
More information about the extropy-chat