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- Newsgroups: sci.space
- Path: sparky!uunet!cs.utexas.edu!convex!convex!ewright
- From: ewright@convex.com (Edward V. Wright)
- Subject: Re: Let's be more specific (was: Stupid Shut Cost arguements)
- Sender: usenet@news.eng.convex.com (news access account)
- Message-ID: <ewright.726733131@convex.convex.com>
- Date: Mon, 11 Jan 1993 06:18:51 GMT
- References: <ewright.726343877@convex.convex.com> <1993Jan7.034841.19216@ptdcs2.intel.com> <ewright.726515610@convex.convex.com> <1993Jan9.030346.9714@ptdcs2.intel.com>
- Nntp-Posting-Host: bach.convex.com
- Organization: Engineering, CONVEX Computer Corp., Richardson, Tx., USA
- X-Disclaimer: This message was written by a user at CONVEX Computer
- Corp. The opinions expressed are those of the user and
- not necessarily those of CONVEX.
- Lines: 27
-
- In <1993Jan9.030346.9714@ptdcs2.intel.com> greason@ptdcs2.intel.com (Jeff Greason ~) writes:
-
- >>The "extreme mass ratio" is an aerospace legend. We've been
- >>building vehicles with similar mass ratios for the last 30
- >>years. The Shuttle external tank has the right mass. So
- >>did the Saturn S-IVB stage.
-
- >I would love to see some convincing evidence of this, as this is the
- >key risk to SSTO in my opinion -- If I get sold of this, I'll try to
- >convince my Congresscritter.
-
- So, contact the National Technical Information Service, get
- the reports on Saturn Applications Single-Stage-to_Orbit,
- Chrysler SERV, etc., and read them.
-
-
- >1) A thermal protection system, capable of surviving multiple reentries
- > (many) suitable for reuse. On previous vehicles, this is ablative and
- > non reusable, or (on Shuttle), heavy and only marginally reusable.
-
- Nonsense. The first US ICBM warhead (Atlas) used a nonablative copper
- heat shield. Copper's too heavy for SSTO, but there are many newer
- refractory metals that would work just fine. The problem is not that
- there's no TPS available, it' choosing from among several alternatives.
-
-
-
-