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Forum: Tech Log

13th Jun 2011, 22:40

Replies: 2,070

AF447 Thread No. 3

Views: 615,214

Posted By CogSim

More like "if you go out of the certification...

More like "if you go out of the certification specifications ... you can have no weird outcomes"

Safety critical systems are designed to perform well beyond the certification specifications (as we...

Forum: Tech Log

7th Jun 2011, 21:17

Replies: 2,070

AF447 Thread No. 3

Views: 615,214

Posted By CogSim

Thank you for the excellent post A33Zab ...

Thank you for the excellent post A33Zab

Is there a threshold of displacement for the sidestick before inputs are valid? How slight is slight? In the a/c I drive, stick neutral and elevator...

Forum: Tech Log

3rd Jun 2011, 13:15

Replies: 2,070

AF447 Thread No. 3

Views: 615,214

Posted By CogSim

This a/c seems to have somehow remained stalled...

This a/c seems to have somehow remained stalled from FL380 to at least FL100 which in itself is quite a feat. But, if I were to put my money on it, I'd say the Pi/4 angle at impact for a machine with...

Forum: Tech Log

2nd Jun 2011, 19:50

Replies: 2,070

AF447 Thread No. 3

Views: 615,214

Posted By CogSim

From the report: The question is has...

From the report:

The question is has the system rejected a/s (60 kt) by this point? If so, why is it still being honored by AoA logic?

"When they are below 30 kt, the speed values...

Forum: Tech Log

1st Jun 2011, 19:44

Replies: 2,070

AF447 Thread No. 3

Views: 615,214

Posted By CogSim

Interesting take:

Interesting take:

Forum: Tech Log

30th May 2011, 01:57

Replies: 2,070

AF447 Thread No. 3

Views: 615,214

Posted By CogSim

With all due respect, the richness of this forum...

With all due respect, the richness of this forum (and others for that matter), stems from the tension that exists between the 'ignorant' and the 'knowledgeable'. I for one have learnt a great deal...

Forum: Tech Log

29th May 2011, 20:15

Replies: 2,070

AF447 Thread No. 3

Views: 615,214

Posted By CogSim

This post is to retract my earlier assessment...

This post is to retract my earlier assessment that the initial response from PF may have been wrong. After spending a couple of days studying the report, I'm not sure anymore. It is unfortunate that...

Forum: Tech Log

29th May 2011, 05:33

Replies: 2,070

AF447 Thread No. 3

Views: 615,214

Posted By CogSim

The last recorded values were a vertical speed of...

The last recorded values were a vertical speed of -10,912 ft/min, a ground speed of 107 kt, pitch attitude of 16.2 degrees nose-up, roll angle of 5.3 degrees left and a magnetic heading of 270...

Forum: Tech Log

28th May 2011, 23:17

Replies: 2,070

AF447 Thread No. 3

Views: 615,214

Posted By CogSim

Thank you. At least the PNF was showing enough...

Thank you. At least the PNF was showing enough awareness to respect the stall warning.

Forum: Tech Log

28th May 2011, 23:04

Replies: 2,070

AF447 Thread No. 3

Views: 615,214

Posted By CogSim

in this statement computer = auto-trim and stall...

in this statement computer = auto-trim and stall warning disappearing/reappearing below/above 60kt threshold.

What I perhaps should have said is the "computer" as defined above, was making it...

Forum: Tech Log

28th May 2011, 22:47

Replies: 2,070

AF447 Thread No. 3

Views: 615,214

Posted By CogSim

PNF. PNF said "so, we’ve lost the speeds"...

PNF.

PNF said "so, we’ve lost the speeds" then "alternate law [...]".

The airplane began to roll to the right and the PF made a left nose-up input.

initial input: left nose-up
response:...

Forum: Tech Log

28th May 2011, 21:04

Replies: 2,070

AF447 Thread No. 3

Views: 615,214

Posted By CogSim

The sad thing is PNF seemed to be more aware of...

The sad thing is PNF seemed to be more aware of what was going on. Very early on in the sequence PNF effectively declares, we are in UAS regime and we've lost protections. PF never acknowledges. I...

Forum: Tech Log

27th May 2011, 20:37

Replies: 2,070

AF447 Thread No. 3

Views: 615,214

Posted By CogSim

That begs the question what were the criteria...

That begs the question what were the criteria used in the editing process. Clearly they must believe whatever was released presents the event without too much distortion.

Forum: Tech Log

27th May 2011, 20:25

Replies: 2,070

AF447 Thread No. 3

Views: 615,214

Posted By CogSim

No acknowledgement from PF. First sign...

No acknowledgement from PF.

First sign of PF identifying problem with indications.
PNF acknowledges.

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