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- Path: sparky!uunet!gatech!gatech!kd4nc!ke4zv!gary
- From: gary@ke4zv.uucp (Gary Coffman)
- Newsgroups: sci.space
- Subject: Re: Terminal Velocity of DCX? (was Re: Shuttle ...)
- Message-ID: <1992Dec20.195520.3587@ke4zv.uucp>
- Date: 20 Dec 92 19:55:20 GMT
- References: <71695@cup.portal.com> <1992Dec15.134224.14502@iti.org> <71781@cup.portal.com> <1gt36dINNq3h@mirror.digex.com>
- Reply-To: gary@ke4zv.UUCP (Gary Coffman)
- Organization: Gannett Technologies Group
- Lines: 33
-
- In article <1gt36dINNq3h@mirror.digex.com> prb@access.digex.com (Pat) writes:
- >
- >I believe in point of fact, that is the whole point of the DC-Y.
- >DC-X will prove the operations and technology. DC-Y will push the
- >envelope to LEO, and test the new engines. DC-1 is then production.
- >
- >Given the low cost of the DC-X,Y test program, we should be advocating
- >the completion of the test program. If it succeeds, then we should
- >all feel good. if it costs too much, we should head back to the
- >drawing boards. God knows, maybe HTHL is the way to go for cheap
- >space flight and gary gets to say "I told you so" 1x10(6) times.
-
- I hope the DC program all works and we get cheap and frequent access
- to LEO, but I don't think it'll operate at airliner costs or schedules,
- or that it will be allowed to land at metropolitian airports as some
- have already accepted as fait accompli. Besides, if it doesn't work,
- I'll only tell you I told you so 10^3 times. :-)
-
- >My gut feel, is that SSTO will always be cheaper then Stacked rockets.
- >Now if there is some way to get useful payload to orbit in an SSTO,
- >we will see.
-
- It depends on how much useful payload we need to lift at a shot and
- how cheap on orbit assembly gets. We haven't exhausted the things we
- can do with small payloads, but there are also things we'd like to
- do that require larger payloads. I contend that on orbit assembly
- won't get cheap enough soon enough to let DC carry nuts and bolts
- to orbit. It'll still be more cost effective to assemble and test
- the bulk of space payloads on the ground and boost them to orbit
- on larger capacity launchers, especially if some effort is put into
- designing a heavy lifter for low labor costs.
-
- Gary
-