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- Path: sparky!uunet!dtix!darwin.sura.net!mojo.eng.umd.edu!lind
- From: lind@eng.umd.edu (Charles A. Lind)
- Newsgroups: sci.space.shuttle
- Subject: Re: Still on the X-30
- Message-ID: <1992Sep08.121136.27080@eng.umd.edu>
- Date: 8 Sep 92 12:11:36 GMT
- References: <92236.132738PDC103@psuvm.psu.edu> <1992Aug27.021252.4459@nntp.uoregon.edu> <1992Aug27.223615.21246@netlabs.com> <1992Sep7.172550.21964@tamsun.tamu.edu>
- Organization: College of Engineering, University of Maryland, College Park
- Lines: 39
- Originator: lind@valkyrie.eng.umd.edu
-
-
- In article <1992Sep7.172550.21964@tamsun.tamu.edu>, glp7584@tamuts.tamu.edu (Gordon Lee Powell Jr) writes:
- >In article <1992Aug27.223615.21246@netlabs.com> lwall@netlabs.com (Larry Wall) writes:
- >>In article <1992Aug27.021252.4459@nntp.uoregon.edu> ggiles@cie.uoregon.edu (Gregg Giles) writes:
- >>: [re: SSTO minimal payload]
- >>: Sure, the first version of such a vehicle would probably have a small
- >>: payload capacity. But think about this: the Wright brothers couldn't take
- >>: much with them, either. Now we have the C5 Galaxy. Think about it. :-)
- >>THINK about it? How depressing. I don't like thinking about things
- >>that will take 70 years to do, if your analogy holds...
- >
- >I think the advance of technology is not considered to be a linear
- >process.
- >
- >Perhaps at an exponential rate, it won't take quite that long.
- >
- >Gordon L. Powell, Jr. '89 glp7584@zeus.tamu.edu (VMS on VAX 9000)
- >Aero Engr Texas A&M Univ. gordon@aero.tamu.edu (D. U. on S. C.)
- >Oh well, some people can flame in a nitrogen environment.--Les Earnest
- >
-
- I think one must define technology before one states how technology
- has increased. For if I define techology as measured by the velocity
- of a non-rocket powered vehicle with time, then clearly technology has
- increased at an exponential rate. Starting with the wright flyer @ ~ 31mph
- in 1903, the P-51 @ ~450 mph in 1942, F-102 @ ~850 mph in 1956, and
- the F-15 @ ~2000 mph in about 1970, this is an exponential growth. If
- one considers rocket power, say Bell XS-1, X-15, Gemini, Apollo, then
- the exponential rate of growth is even greater.
- In addition, if one considers altitude as a measure of technology,
- the growth is about linear.
-
- (NOTE: See John Anderson's book, Introduction to Flight, 2nd Ed., Figures
- 1.27 & 1.28 for the source of my information)
-
- Charles Lind
- Dept. of Aerospace Eng.
- University of Maryland
- College Park, MD
-