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A comment on Abandoned in space in 1967, a US satellite has started transmitting again. Parent comment

Re:Abandoned in space in 1967, a US satellite has started tr... by pjc50 on Wednesday November 02, 2016 @05:33AM (#12853230)
Recently I've been working my way through the PPrune megathread on Concorde: http://www.pprune.org/tech-log/423988-concorde-question-77.h... , in which (somewhere) is a discussion of the control systems. Analog fly-by-wire! A complex set of "synchro" and "resolver" systems connected to op-amps, giving it autostabilisation and autothrottle all the way up to Mach 2. The pilots would just push the throttles full open on the runway and leave them there until it was time to come down.
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Re:Abandoned in space in 1967, a US satellite has started tr... by Animats on Wednesday November 02, 2016 @12:42PM (#12856687)
The F-16 used analog fly by wire, and the F-16's analog computer was very well thought of.[1] Here's what it looks like.[2] All those discrete parts! Note the quadruple redundancy.

[1] http://www.f-16.net/articles_article13.html [2] http://duotechservices.com/pitch-1-board-repair-of-the-analo...

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Re:Abandoned in space in 1967, a US satellite has started tr... by concerned_user on Wednesday November 02, 2016 @05:50AM (#12853282)
AFAIK Concode only uses ~80% thrust on takeoff due to vibrations engines create and risk of overheat. Also fuel gets pumped around to change CG, it is a fascinating piece of machinery.
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Re:Abandoned in space in 1967, a US satellite has started tr... by pjc50 on Wednesday November 02, 2016 @06:25AM (#12853425)
It's all in that thread :) The 80% limit was only on one engine, due to vortex issues. The others had to be at "100%" and full afterburner to get off the ground. The actual volume of fuel flow for a particular power level was also determined by an analogue computer measuring the inlet air temperature and pressure.

http://www.pprune.org/tech-log/423988-concorde-question-4.ht...

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Re:Abandoned in space in 1967, a US satellite has started tr... by anexprogrammer on Wednesday November 02, 2016 @07:07AM (#12853578)
Relevant distraction: Nice in cockpit vid of pre takeoff CG and fuel transfer checks, take off, and after checks. 10m.

http://www.liveleak.com/view?i=16a_1231096566

Low light takeoff, because pretty: https://www.youtube.com/watch?v=l7mt6AKKhq4

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Re:Abandoned in space in 1967, a US satellite has started tr... by digler999 on Wednesday November 02, 2016 @10:02AM (#12854772)
NSFW warning for the liveleak vid, if you're at work the site contains porn ads.
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Re:Abandoned in space in 1967, a US satellite has started tr... by Alupis on Wednesday November 02, 2016 @01:15PM (#12857065)
> NSFW warning for the liveleak vid, if you're at work the site contains porn ads.

For you maybe.

You gotta start signing out of your google and facebook account when searching certain things... retargetting will get ya! ;-P

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Re:Abandoned in space in 1967, a US satellite has started tr... by kozak on Wednesday November 02, 2016 @08:22AM (#12853942)
Someone should write a book based on that thread, seriously.
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Re:Abandoned in space in 1967, a US satellite has started tr... by pryelluw on Wednesday November 02, 2016 @02:33PM (#12857849)
I just returned here from that thread. Fascinating and time consuming. Well worth reading.
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