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Re: Computers anyone?

From Anne & Lynn Wheeler <lynn@garlic.com>
Newsgroups alt.folklore.computers
Subject Re: Computers anyone?
Date 2016-03-09 16:42 -0800
Organization Wheeler&Wheeler
Message-ID <87h9gfw4c1.fsf@garlic.com> (permalink)
References <dka4p9Fhde9U1@mid.individual.net> <874mcfu0w7.fsf@garlic.com> <4qidnScPE9p74X3LnZ2dnUU7-eOdnZ2d@giganews.com>

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Jon Elson <jmelson@wustl.edu> writes:
> Uhh, the Navy's F-14 was swing wing, the F-15 is fixed.

http://www.ausairpower.net/Profile-F-15A-D.html

The idea of an air-air fighter was under consideration as early as
1965, but the subsequent FX study generated by USAF Systems Command
created the concept of a 60,000 lb swing wing machine much like the
F-111, already under criticism for its inability to do what it wasn't
built for.

At this stage a Major John Boyd was appointed to rework the FX study and
generate a workable solution. Boyd was an outstanding air combat
tactician and the originator of the concept of energy
manoeuvrability. The concept revolves about the necessity for an
aircraft to maintain a maximum amount of kinetic/potential energy in a
dogfight, to be able to retain as much agility as possible.

http://www.flightsimbooks.com/jfs/page1.php

The FX program (Fighter eXperimental) was the result. The first FX
proposals were very heavy (60,000 pounds) and employed the
then-fashionable swing-wing design. This being too much like the
ill-fated F-111 design, the momentum swung in the other direction, until
in 1967 the conceived aircraft was down to 30,000 pounds.

boyd posts & URL
http://www.garlic.com/~lynn/subboyd.html

after redoing the original FX (swing-wing) design for what becomes F15
... he then starts on yf16/f16 (anticipating that the f15 forces would
come after him and try and have him thrown in Leavenworth for the rest
of his life, he leaves no trail of his supercomputer use involved in
yf16 design).

The yf16/f16 is non-stable & fly-by-wire
https://en.wikipedia.org/wiki/General_Dynamics_F-16_Fighting_Falcon#Negative_stability_and_fly-by-wire

The F-16 was the first production fighter aircraft intentionally
designed to be slightly aerodynamically unstable, also known as "relaxed
static stability" (RSS), to improve maneuverability.[66] Most aircraft
are designed with positive static stability, which induces aircraft to
return to straight and level flight attitude if the pilot releases the
controls; this reduces maneuverability as the inherent stability has to
be overcome. Aircraft with negative stability are designed to deviate
from controlled flight and thus be more maneuverable. At supersonic
speeds the F-16 gains stability (eventually positive) due to aerodynamic
changes

... 

Unlike the YF-17, which had hydromechanical controls serving as a backup
to the FBW, General Dynamics took the innovative step of eliminating
mechanical linkages between the control stick and rudder pedals, and the
flight control surfaces. The F-16 is entirely reliant on its electrical
systems to relay flight commands, instead of traditional
mechanically-linked controls, leading to the early moniker of "the
electric jet". The quadruplex design permits "graceful degradation" in
flight control response in that the loss of one channel renders the FLCS
a "triplex" system.[72] The FLCC began as an analog system on the A/B
variants, but has been supplanted by a digital computer system beginning
with the F-16C/D Block 40.[73][74] The F-16's controls suffered from a
sensitivity to static electricity or electrostatic discharge (ESD). Up
to 70-80% of the C/D models' electronics were vulnerable to ESD.[75]

... snip ...

ARTIFICIAL STABILITY & FLY-BY-WIRE CONTROL
http://www.ausairpower.net/AADR-FBW-CCV.html


--
virtualization experience starting Jan1968, online at home since Mar1970

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Thread

Computers anyone? Bob Martin <bob.martin@excite.com> - 2016-03-09 08:22 +0000
  Re: Computers anyone? "Rod Speed" <rod.speed.aaa@gmail.com> - 2016-03-09 19:25 +1100
  Re: Computers anyone? jmfbahciv <See.above@aol.com> - 2016-03-09 13:41 +0000
    Re: Computers anyone? Peter Flass <peter_flass@yahoo.com> - 2016-03-09 06:48 -0700
    Re: Computers anyone? Huge <Huge@nowhere.much.invalid> - 2016-03-09 14:00 +0000
      Re: Computers anyone? "Sam Crean" <sg55443@gmail.com> - 2016-03-10 04:46 +1100
    Re: Computers anyone? "Sam Crean" <sg55443@gmail.com> - 2016-03-10 04:40 +1100
    Re: Computers anyone? "Charles Richmond" <numerist@aquaporin4.com> - 2016-03-09 13:50 -0600
    Re: Computers anyone? "J. Clarke" <j.clarke.873638@gmail.com> - 2016-03-09 17:32 -0500
      Re: Computers anyone? jmfbahciv <See.above@aol.com> - 2016-03-10 13:24 +0000
        Re: Computers anyone? "J. Clarke" <j.clarke.873638@gmail.com> - 2016-03-10 08:56 -0500
        Re: Computers anyone? Peter Flass <peter_flass@yahoo.com> - 2016-03-10 07:29 -0700
          Re: Computers anyone? "J. Clarke" <j.clarke.873638@gmail.com> - 2016-03-10 20:19 -0500
          Re: Computers anyone? jmfbahciv <See.above@aol.com> - 2016-03-11 13:08 +0000
            Re: Computers anyone? "Sam Crean" <sg55443@gmail.com> - 2016-03-12 04:02 +1100
              Re: Computers anyone? jmfbahciv <See.above@aol.com> - 2016-03-12 13:34 +0000
                Re: Computers anyone? "Sam Crean" <sg55443@gmail.com> - 2016-03-13 04:35 +1100
                Re: Computers anyone? "J. Clarke" <j.clarke.873638@gmail.com> - 2016-03-12 15:54 -0500
                Re: Computers anyone? pechter@chuckie.(none) (William Pechter) - 2016-03-12 20:51 +0000
                Re: Computers anyone? Ahem A Rivet's Shot <steveo@eircom.net> - 2016-03-13 07:44 +0000
                Re: Computers anyone? Walter Bushell <proto@panix.com> - 2016-04-11 17:00 -0400
                Re: Computers anyone? "J. Clarke" <j.clarke.873638@gmail.com> - 2016-04-11 19:07 -0400
          Re: Computers anyone? Gene Wirchenko <genew@telus.net> - 2016-03-12 15:10 -0800
          Re: Computers anyone? hancock4@bbs.cpcn.com - 2016-03-12 18:03 -0800
            Re: Computers anyone? Anne & Lynn Wheeler <lynn@garlic.com> - 2016-03-12 18:34 -0800
            Re: Computers anyone? "Sam Crean" <sg55443@gmail.com> - 2016-03-13 15:28 +1100
  Re: Computers anyone? Ahem A Rivet's Shot <steveo@eircom.net> - 2016-03-09 14:08 +0000
  Re: Computers anyone? scott@slp53.sl.home (Scott Lurndal) - 2016-03-09 14:41 +0000
  Re: Computers anyone? Anne & Lynn Wheeler <lynn@garlic.com> - 2016-03-09 07:27 -0800
    Re: Computers anyone? Jon Elson <jmelson@wustl.edu> - 2016-03-09 13:44 -0600
      Re: Computers anyone? scott@slp53.sl.home (Scott Lurndal) - 2016-03-09 20:15 +0000
      Re: Computers anyone? "J. Clarke" <j.clarke.873638@gmail.com> - 2016-03-09 17:38 -0500
        Re: Computers anyone? Anne & Lynn Wheeler <lynn@garlic.com> - 2016-03-09 17:14 -0800
          Re: Computers anyone? Anne & Lynn Wheeler <lynn@garlic.com> - 2016-03-09 17:35 -0800
            Re: Computers anyone? "J. Clarke" <j.clarke.873638@gmail.com> - 2016-03-09 21:31 -0500
              Re: Computers anyone? Anne & Lynn Wheeler <lynn@garlic.com> - 2016-03-09 20:25 -0800
                Re: Computers anyone? Peter Flass <peter_flass@yahoo.com> - 2016-03-10 01:55 -0700
                Re: Computers anyone? mausg@mail.com - 2016-03-10 11:47 +0000
                Re: Computers anyone? "J. Clarke" <j.clarke.873638@gmail.com> - 2016-03-10 08:54 -0500
                Re: Computers anyone? Alan Bowler <atbowler@thinkage.ca> - 2016-03-30 12:47 -0400
                Re: Computers anyone? "Sam Crean" <sg55443@gmail.com> - 2016-03-11 04:01 +1100
                Re: Computers anyone? Anne & Lynn Wheeler <lynn@garlic.com> - 2016-03-10 09:04 -0800
                Re: Computers anyone? "Sam Crean" <sg55443@gmail.com> - 2016-03-11 04:28 +1100
                Re: Computers anyone? Anne & Lynn Wheeler <lynn@garlic.com> - 2016-03-10 13:44 -0800
                Re: Computers anyone? Anne & Lynn Wheeler <lynn@garlic.com> - 2016-03-10 19:28 -0800
                Re: Computers anyone? "J. Clarke" <j.clarke.873638@gmail.com> - 2016-03-11 06:16 -0500
                Re: Computers anyone? Anne & Lynn Wheeler <lynn@garlic.com> - 2016-03-11 10:37 -0800
                Re: Computers anyone? Anne & Lynn Wheeler <lynn@garlic.com> - 2016-03-12 12:37 -0800
                Re: Computers anyone? Anne & Lynn Wheeler <lynn@garlic.com> - 2016-03-17 09:25 -0700
        Re: Computers anyone? Stephen Sprunk <stephen@sprunk.org> - 2016-03-09 21:35 -0600
          Re: Computers anyone? mausg@mail.com - 2016-03-10 11:52 +0000
            Re: Computers anyone? "J. Clarke" <j.clarke.873638@gmail.com> - 2016-03-10 08:55 -0500
        Re: Computers anyone? scott@slp53.sl.home (Scott Lurndal) - 2016-03-10 13:53 +0000
          Re: Computers anyone? Jon Elson <jmelson@wustl.edu> - 2016-03-10 14:21 -0600
            Re: Computers anyone? Anne & Lynn Wheeler <lynn@garlic.com> - 2016-03-10 13:17 -0800
            Re: Computers anyone? "J. Clarke" <j.clarke.873638@gmail.com> - 2016-03-10 20:29 -0500
          Re: Computers anyone? "J. Clarke" <j.clarke.873638@gmail.com> - 2016-03-10 20:17 -0500
      Re: Computers anyone? Anne & Lynn Wheeler <lynn@garlic.com> - 2016-03-09 16:42 -0800
        Re: Computers anyone? "J. Clarke" <j.clarke.873638@gmail.com> - 2016-03-09 20:19 -0500
  Re: Computers anyone? Bud Frede <frede@mouse-potato.com> - 2016-03-09 12:13 -0500
    Re: Computers anyone? "Sam Crean" <sg55443@gmail.com> - 2016-03-10 04:58 +1100
      Re: Computers anyone? Bud Frede <frede@mouse-potato.com> - 2016-03-10 06:37 -0500
  Re: Computers anyone? Jon Elson <jmelson@wustl.edu> - 2016-03-09 13:39 -0600
    Re: Computers anyone? Peter Flass <peter_flass@yahoo.com> - 2016-03-10 01:55 -0700
      Re: Computers anyone? Dave Garland <dave.garland@wizinfo.com> - 2016-03-10 09:43 -0600
      Re: Computers anyone? Jon Elson <jmelson@wustl.edu> - 2016-03-10 14:06 -0600
        Re: Computers anyone? jmfbahciv <See.above@aol.com> - 2016-03-11 13:08 +0000
        Re: Computers anyone? mausg@mail.com - 2016-03-11 14:10 +0000
          Re: Computers anyone? Ahem A Rivet's Shot <steveo@eircom.net> - 2016-03-11 16:21 +0000
          Re: Computers anyone? Peter Flass <peter_flass@yahoo.com> - 2016-03-11 17:04 -0700
            Re: Computers anyone? Huge <Huge@nowhere.much.invalid> - 2016-03-12 18:04 +0000
              Re: Computers anyone? mausg@mail.com - 2016-03-12 19:32 +0000
                Re: Computers anyone? Walter Bushell <proto@panix.com> - 2016-03-21 20:17 -0400
            Re: Computers anyone? mausg@mail.com - 2016-03-12 19:30 +0000
  Re: Computers anyone? hancock4@bbs.cpcn.com - 2016-03-09 12:14 -0800
  Re: Computers anyone? hankvc@blackhole.lostwells.org (Hank) - 2016-03-12 07:34 +0000
    Re: Computers anyone? Peter Flass <peter_flass@yahoo.com> - 2016-03-12 07:30 -0700

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