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- Path: sparky!uunet!portal!cup.portal.com!BrianT
- From: BrianT@cup.portal.com (Brian Stuart Thorn)
- Newsgroups: sci.space
- Subject: Re: Shuttle replacement
- Message-ID: <69996@cup.portal.com>
- Date: Sat, 21 Nov 92 19:06:36 PST
- Organization: The Portal System (TM)
- References: <1992Nov18.034010.18488@Princeton.EDU>
- <1992Nov19.144309.22398@iti.org> <q!z1l0f@rpi.edu>
- <1992Nov20.142445.20795@iti.org>
- Lines: 33
-
- Allen...
-
- There is still *one* thing that the Space Shuttle can do that no other
- launch system is capable of... bringing things back from orbit.
-
- Whether or not it is efficient to do so is another question. I posted
- another question about why Hubble Space Telescope is not brought back
- home for repairs. There are many reasons in this case, mostly concerning
- cost and loss of productivity (however limited it would be).
-
- The Shuttle, as you continually point out, is enormously expensive to
- operate and inefficient when it is operating. But I don't think putting
- a Soyuz on an Atlas (which *doesn't* have the lift capacity, BTW) or a
- Titan IV (which isn't much better than Shuttle) is a reasonable solution.
-
- Shuttle certainly does not have 'twice the lift capacity' of Titan IV as
- an earlier poster contended, but it does have about one-third more, I
- believe. NASA just doesn't use that capability. Instead, NASA is flying
- Shuttles with half-full payload bays (STS-52). Someday, we might actually
- have a payload requiring all that lift, or return capacity, and as we did
- after the demise of Saturn V, we'll be saying "why did we abandon it?"
-
- Or maybe not.
-
- On a related topic (your informative background on Delta Clipper) this
- sounds like an excellent idea, but I'm nervous about it. Having grown up
- in the Cape Canaveral area, and seen my share of boosters blow up or go
- tumbling into the Atlantic, the idea of a powered descent and vertical
- landing gives me the willies... I sure hope that thing has plenty of
- redundancy... rocket engines have a way of conking out at innopportune
- times.
-
- -Brian
-