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- Newsgroups: sci.space
- Path: sparky!uunet!spool.mu.edu!sdd.hp.com!zaphod.mps.ohio-state.edu!usc!rpi!clotho.acm.rpi.edu!strider
- From: strider@clotho.acm.rpi.edu (Greg Moore)
- Subject: Re: SSTO vs. 2 Stage
- Message-ID: <qf22l5c@rpi.edu>
- Nntp-Posting-Host: acm.rpi.edu
- Organization: The Voice of Fate
- References: <18892@mindlink.bc.ca> <ewright.725658384@convex.convex.com>
- Date: Wed, 30 Dec 1992 03:36:34 GMT
- Lines: 53
-
- In article <ewright.725658384@convex.convex.com> ewright@convex.com (Edward V. Wright) writes:
- >In <18892@mindlink.bc.ca> Bruce_Dunn@mindlink.bc.ca (Bruce Dunn) writes:
- >
- >> We have been launching staged rockets for nearly half a century. I
- >>think the problems of staging, if not trivial, are solvable. Certainly,
- >>historical evidence indicates that staging is less of a technical challenge
- >>than SSTO operation.
- >
- >Bingo!
- >
- >Okay, now we've gotten to the crux of the problem.
- >
- Ayup, we have. You want people either to lead, follow or get
- out of the way. Yet, when someone suggests a technique that MAY give
- a five-fold increase in lbs to orbit, you immediately jump down
- their throat. Si I guess leading is not there, so I guess that leaves,
- Following or getting out of your way.
-
- >You simply do not understand the difference between a converted
- >artillery rocket, which we have been launching for nearly half
- >a century, and a single-stage-to-orbit *spaceship*.
- >
- >Saying that launch vehicles should be multistaged like ICBMs
- >makes as much sense as saying that airplanes should be shaped
- >like cannonballs.
- >
- I don't know about cannonballs, but artillery shells and
- airplanes tend to have similar shapes in their bodies. But,
- your analogy is only half meritted. The reason DC-1 may be a lot
- less expensive is due to a LOT of factors, only one of which is
- related to staging costs. And, if you approach the problem of
- staging the same way DC-X is approaching some other problems,
- you MAY find that it can be done cheap enough to merit the work.
- If you don't, hey, they you go on. Not every idea for a DC-1
- follow-on will work. Some will, some won't. Let's give
- it some time and find out what our needs are. Perhaps we find for
- whatever reason that 90% of our payload to orbit is about the
- right size for DC-1, and the remaining 10% needs a lift capacity
- of 8 times DC-1. Well, in that case, economics dictates that
- a DC-0 WOn't work. But ther may be economic scenarious where
- it does work.
-
- The biggest objection I have to DC-0 right now, is that
- I don't see a market for it. That may change. It depends on
- if cheaper access to space prompts people to launch bigger payloads,
- or more smaller ones.
-
-
- >
- >
- >
-
-
-