[ExI] Spacecraft (was MM)
sjatkins at mac.com
Fri Dec 31 07:30:10 UTC 2010
On Dec 30, 2010, at 3:18 PM, Keith Henson wrote:
> On Thu, Dec 30, 2010 at 3:24 PM, "spike" <spike66 at att.net> wrote:
> (I think some people, no names, are exhibiting delusion of grandeur.)
>> As a spacecraft controls guy I am reluctant to admit it, but this comment is
>> really right on, the conclusion I eventually reached with much kicking and
>> screaming over 20 yrs ago.
> And 20 years ago, that was the right conclusion. Now we have a path,
> even if it kind of expensive, to 9+km/sec exhaust velocity. That
> means mass ratio 3 rockets to LEO and even better LEO to GEO.
I must have missed it. Please give details, links, etc. How expensive? How large a payload? What technologies?
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