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- Newsgroups: sci.space
- Path: sparky!uunet!wupost!cs.utexas.edu!torn!utzoo!henry
- From: henry@zoo.toronto.edu (Henry Spencer)
- Subject: SR-1 (was Re: DoD launcher use)
- Message-ID: <Bz6Bpq.Cyx@zoo.toronto.edu>
- Date: Sun, 13 Dec 1992 01:20:13 GMT
- References: <Bz06qo.D7r@zoo.toronto.edu> <1992Dec10.150004.20940@iti.org> <1992Dec11.171055.24364@ke4zv.uucp> <1992Dec11.204050.10734@iti.org>
- Organization: U of Toronto Zoology
- Lines: 39
-
- In article <1992Dec11.204050.10734@iti.org> aws@iti.org (Allen W. Sherzer) writes:
- >>Using DC itself as a recon platform
- >>seems like serious overkill,
- >
- >Not DC itself. DC simply launches the satellite.
-
- Actually, why not DC itself? It's the ultimate recon aircraft: pictures
- of any location in the world (weather permitting) within an hour of takeoff,
- operation far beyond conventional SAM envelopes, and no need for vulnerable
- and costly forward operating bases. You pay for this, of course, in very
- high fuel consumption and high wear-and-tear costs (more expensive vehicle
- with a shorter lifetime). Large-scale use would perhaps be too expensive,
- but using a squadron of suitably-equipped DCs -- call it, say, the SR-1 --
- as the high end of a spectrum of recon aircraft is not ridiculous.
-
- As for it being "serious overkill", lots of problems are solved that way.
- When costs of general-purpose solutions fall enough, the special-purpose
- solutions wither and die, or are restricted to particularly-demanding
- niche markets, because they're no longer worth the trouble. Architects
- from Babylon to Chartres sweated to develop the arch as a way of supporting
- things, but we do almost all our structures with post-and-lintel -- the
- stone-age precursor of the arch -- because with modern materials, it works
- just fine and is a lot less hassle for most jobs. There is an entire
- computer in your *keyboard*, spending its whole life doing nothing but
- waiting for your keystrokes and passing them on to the machine that does
- the real work... because special-purpose keyboard-encoder chips are no
- longer worth designing. Nuclear propulsion for aircraft once looked like
- the only way to get very long range, but in the time needed to half-
- solve its problems, conventional jet engines improved so spectacularly
- (the unrefuelled cruising range of a B-52H, with early-1960s engine
- technology, is *twelve thousand miles*) that it was obsolete before it
- ever powered an aircraft.
-
- Nobody will build hypersonic recon aircraft if spaceships are already
- available and cheap enough. The SR-1 may not be good enough, but the
- SR-2 or SR-3 probably will be.
- --
- "God willing... we shall return." | Henry Spencer @ U of Toronto Zoology
- -Gene Cernan, the Moon, Dec 1972 | henry@zoo.toronto.edu utzoo!henry
-