[ExI] [Server-sky] Server Sky transport energy comparison

[Eugen Leitl]

----- Forwarded message from Keith Lofstrom <keithl at kl-ic.com> -----

Date: Sun, 28 Jul 2013 11:23:51 -0700
From: Keith Lofstrom <keithl at kl-ic.com>
To: server-sky at server-sky.com
Subject: [Server-sky] Server Sky transport energy comparison
User-Agent: Mutt/1.4.2.2i
Reply-To: keithl at keithl.com

Launch costs a heck of a lot more per kilogram than ship/rail/truck,
but server-sky thinsats produce a heck of a lot more energy per
kilogram than a terrestrial solar panel.  The transport energy
payback time for a Chinese solar panel sent to the New Mexico
desert is 60 days, for a first generation thinsat is 22 days. 

Second generation ultralight thinsats, ballasted with harvested
space debris, may have transport energy payback times of less
than five days.  

See http://server-sky/Transport

Third generation thinsats, manufactured in space from lunar
materials (chips and rare materials still earth launched)
will be cheaper still, but my crystal ball is too cloudy
for usable estimates that far in the future.

Keith

-- 
Keith Lofstrom          keithl at keithl.com         Voice (503)-520-1993
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----- End forwarded message -----
-- 
Eugen* Leitl <a href="http://leitl.org">leitl</a> http://leitl.org
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