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- Newsgroups: sci.space
- Path: sparky!uunet!hela.iti.org!aws
- From: aws@iti.org (Allen W. Sherzer)
- Subject: Re: Shuttle replacement
- Message-ID: <1992Nov22.191524.6478@iti.org>
- Organization: Evil Geniuses for a Better Tomorrow
- References: <q!z1l0f@rpi.edu> <1992Nov20.142445.20795@iti.org> <69996@cup.portal.com>
- Date: Sun, 22 Nov 1992 19:15:24 GMT
- Lines: 76
-
- In article <69996@cup.portal.com> BrianT@cup.portal.com (Brian Stuart Thorn) writes:
- >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.
-
- At the moment there is no requirement for this capability. There simply
- isn't anything we can return. The only things brought back have been LDEF
- and a coupld of satellites. LDEF can be split up into several experiments
- (which would allow greater access) and fly every Soyuz mission.
-
- Satellites cannot be brought back in a cost effective manner. The only
- ones brought back had to recive hundreds of millions is subsidies from
- us taxpayers.
-
- >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).
-
- Brinning Hubble back and flying it again would cost well over a billion
- $$. For less, we could build a new one and launch on a Titan.
-
- >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
-
- Atlas is close. If it can't, we can go with Titan III for far far less.
-
- >Titan IV (which isn't much better than Shuttle) is a reasonable solution.
-
- A Titan IV launch costs about a third of what a Shuttle flight costs.
-
- >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.
-
- The new Titan SRMs will close most if not all of that gap.
-
- >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?"
-
- We wo't have those payloads as long as Shuttle is consuming a third of
- the NASA budget. It is a millstone holding us all to the Earth.
-
- There are plenty of heavy lift options we can go with when we need them.
- All are far cheaper than Shuttle.
-
- 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,
-
- In the last ten years or so almost all the boosters have been blown up
- by range safety.
-
- >the idea of a powered descent and vertical
- >landing gives me the willies...
-
- Much safer than airplanes for most people. A DC crash will only affect the
- Spaceport. When aircraft crash they tend to kill people on the ground.
-
- >I sure hope that thing has plenty of
- >redundancy... rocket engines have a way of conking out at innopportune
- >times.
-
- All SSTO designs I have ever seen have at least one engine out capability.
-
- Allen
-
- --
- +---------------------------------------------------------------------------+
- | Allen W. Sherzer | "A great man is one who does nothing but leaves |
- | aws@iti.org | nothing undone" |
- +----------------------153 DAYS TO FIRST FLIGHT OF DCX----------------------+
-