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- Xref: sparky sci.space.shuttle:2793 sci.space:16131
- Newsgroups: sci.space.shuttle,sci.space
- Path: sparky!uunet!utcsri!utzoo!henry
- From: henry@zoo.toronto.edu (Henry Spencer)
- Subject: Re: Shuttle replacement
- Message-ID: <BxzKyE.599@zoo.toronto.edu>
- Date: Thu, 19 Nov 1992 23:23:00 GMT
- References: <1992Nov17.194901.16883@aio.jsc.nasa.gov> <1992Nov19.073340.27278@netcom.com>
- Organization: U of Toronto Zoology
- Lines: 39
-
- In article <1992Nov19.073340.27278@netcom.com> hage@netcom.com (Carl Hage) writes:
- >: This BTW is a source of trouble for SSTO.
- >
- >A source of trouble? HL20 won't win any arguments claiming to be better
- >because it's more expensive...
-
- Remember that money = jobs; being a lot cheaper is *not* an unmixed political
- blessing.
-
- The big problem HL20 presents for SSTO is that a lot of NASA people see
- HL20 as work for them and SSTO as work for somebody else... and NASA is
- the established source of expertise on spaceflight, so any space project
- that NASA dislikes has an uphill battle ahead of it. (This isn't a new
- problem, by the way.) All the more so because SSTO challenges NASA's
- credibility, not just its turf, by being (if it works) a vastly-superior
- system built at low cost with off-the-shelf technology. This is bad news
- if you've spent your career defending very expensive projects as "the only
- way it can be done".
-
- >Claims of $1M or even $10M launch costs seem too low to be believable.
- >... Does your info kit offer clear and complete
- >information that will convince a skeptic?
-
- Nothing short of a flight demonstration will convince really skeptical
- observers. A successful on-budget DC-X, especially with a demonstration
- of rapid reflight with minimal refurbishing, will help a lot.
-
- >It seems like it is a matter of a few simple calculations to show that
- >it is theoretically possible/impossible given some basic assumptions
- >about current rocket technology like, weight, engine efficiency, fuel
- >weight, etc. Presumably you have shown that it is possible.
-
- It's been (theoretically) possible at least since the 60s, perhaps earlier.
- (Ed Heinemann, Douglas's military-aircraft miracle-worker, sketched an
- expendable SSTO launcher in the late 40s... Pity he never got the chance
- to build it.)
- --
- MS-DOS is the OS/360 of the 1980s. | Henry Spencer @ U of Toronto Zoology
- -Hal W. Hardenbergh (1985)| henry@zoo.toronto.edu utzoo!henry
-