On 05/14/2010 06:30 PM, Geoff Oltmans wrote:
Yeah, I've seen that before too. It's
interesting that the ISS building program was slated to end the same time as the last
shuttle launches.
Other way around. NASA wanted to retire the Space Shuttle to work
on a
new system, and decided to do it as soon as the ISS was complete. The
issue was that Congress wouldn't give them enough budget to continue
flying the Space Shuttle and in parallel develop its replacement. Each
Space Shuttle mission costs around $750 million (private estimate, the
published NASA estimate is $450 million but is not generally considered
credible). It seems to me that they should have kept flying but scaled
back to a schedule of four flights per year, while developing the
replacement.
A really big problem is that once they committed to shutting down the
Space Shuttle program, it became all but impossible (prohibitively
expensive even by Congressional standards) to extend the program beyond
the scheduled shutdown.
Maybe nothing else can carry as bulky a load? Dunno.
AFAICT, a Delta IV Heavy would be perfectly suitable for launching ISS
modules. It's not suitable for launching astronauts. One of the
possible alternatives to Ares I was upgrading the Delta IV Heavy to be
man-rated. NASA decided against that for political reasons; my friends
who are aerospace engineers tell me that from a technical point of view
it would have been better in every way than Ares I.
Eric