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- Newsgroups: sci.space
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!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.726343877@convex.convex.com>
- Date: Wed, 6 Jan 1993 18:11:17 GMT
- References: <1993Jan1.030602.21051@ke4zv.uucp> <1993Jan2.043524.15196@iti.org> <1993Jan4.191452.12294@ke4zv.uucp> <1993Jan4.214819.14834@iti.org> <1993Jan5.215441.21415@ke4zv.uucp>
- 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: 42
-
- In <1993Jan5.215441.21415@ke4zv.uucp> gary@ke4zv.uucp (Gary Coffman) writes:
-
- >And nothing better *is* online yet. So Shuttle remains the *cheapest* manned
- >western launcher since all the others have infinite costs (*any* non-zero
- >cost divided by zero availability is still infinite).
-
- The Shuttle also has zero availability, if your time frame is the
- next few days. Your car has zero availability, if your time frame
- is the next 30 seconds. (I'm assuming you're not a track star.)
- Soyuz spacecraft/launchers purchased from the Russians have zero
- availability, if your time frame is the next six months. DC-1
- has zero availability, if your time frame is the next four years.
-
- Even using this rather peculiar accounting system, the Shuttle's
- cost doesn't seem any better than the alternatives. All you can
- really say is that it's availability sooner than some, perhaps
- all, of the alternatives. But not immediately. Not tommorow
- morning. The question is, must we reject any alternative that
- would result in *any* delay in *any* program.
-
- Switching from the Shuttle to Vehicle X would certainly delay
- some payloads and missions currently planned to fly aboard the
- Shuttle. But remaining with the Shuttle might delay other
- payloads and missions that are not yet planned but could be
- flown on Vehicle X. You can't just look at one side of the
- equation; you need to do a complete cost-benefit analysis.
-
- But there's another aspect you need to consider. The people
- running the Shuttle program have engaged in guerilla warfare
- against anyone trying to develop an alternative launcher, and
- there is every reason to believe they will continue to do so
- as long as the Shuttle keeps flying. So the very existance
- of the Shuttle may prevent us from *ever* developing an alternative
- launch vehicle.
-
- (Oh, and just to be picky about it, division by zero does not
- produce infinity as a result. The result is undefined.)
-
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