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- Newsgroups: sci.space
- Path: sparky!uunet!gatech!destroyer!sol.ctr.columbia.edu!eff!news.oc.com!convex!ewright
- From: ewright@convex.com (Edward V. Wright)
- Subject: Re: Terminal Velocity of DCX? (was Re: Shuttle ...)
- Sender: usenet@news.eng.convex.com (news access account)
- Message-ID: <ewright.724443346@convex.convex.com>
- Date: Tue, 15 Dec 1992 18:15:46 GMT
- References: <1992Dec2.121110.22879@ke4zv.uucp> <BynsG8.E5p@news.cso.uiuc.edu> <1992Dec3.143759.2535@ke4zv.uucp> <BypAIA.CBn@access.digex.com> <1992Dec5.165219.18302@ke4zv.uucp> <ewright.723847855@convex.convex.com> <1992Dec10.195138.16873@ke4zv.uucp>
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- 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: 19
-
- In <1992Dec10.195138.16873@ke4zv.uucp> gary@ke4zv.uucp (Gary Coffman) writes:
-
- >And electrical engineers were building and operating multi-megawatt
- >power systems long before aircraft ever left the drawing board. We
- >know something about reliability engineering too. We like things simple
- >and robust. Every safety critical circuit has a separate backup, usually
- >using a different design that is unlikely to share common failure points.
- >Simple redundancy is all fine and good, but can lead to redundant failures.
-
- There are different ways of designing redundancy into a system. Some
- reduce the probability of a failure, others increase it. Engineers
- are taught to recognize the difference, maximize the former, and minimize
- the latter. Your multi-megawatt generators wouldn't work very well,
- either, if the engineers were the kind of blithering idiots that you
- assume everyone who works on SSTO must be.
-
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