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Forum: Tech Log

18th Nov 2011, 10:14

Replies: 1,353

AF 447 Thread No. 7

Views: 300,798

Posted By Dani

This is an extract from Airbus publication about...

This is an extract from Airbus publication about Unusual attitudes, stall avoidance and unreliable speed, issued in light of AF447.

You can read it also in "A320 family instructor support" by...

Forum: Tech Log

17th Nov 2011, 21:02

Replies: 1,353

AF 447 Thread No. 7

Views: 300,798

Posted By Dani

I don't agree. The whole AI's fbw system is made...

I don't agree. The whole AI's fbw system is made to maintain or achieve an ordered load factor. Not the trim sub system.

Remember: You give a sidestick input, that's the load factor you order. Now...

Forum: Tech Log

17th Nov 2011, 20:27

Replies: 1,353

AF 447 Thread No. 7

Views: 300,798

Posted By Dani

Maybe, I still don't see where autotrim was to...

Maybe, I still don't see where autotrim was to blame in AF447's case. It did autotrim what the PF ordered. Autotrim has no artificial intelligence to know what's in a pilot's mind. It stupidly does...

Forum: Tech Log

17th Nov 2011, 19:34

Replies: 1,353

AF 447 Thread No. 7

Views: 300,798

Posted By Dani

this sentence does not mean that they don't know...

this sentence does not mean that they don't know the correctness of flight control surfaces movements, but: You simply cannot predict the flight path in a stall anymore, the aircraft is not behaving...

Forum: Tech Log

17th Nov 2011, 17:00

Replies: 1,353

AF 447 Thread No. 7

Views: 300,798

Posted By Dani

This is certainly true, but BEA has tested every...

This is certainly true, but BEA has tested every steering input on AF447 against the real aircraft parameter and has come to the conclusion that they are completly consistent. There was nothing wrong...

Forum: Tech Log

16th Nov 2011, 21:40

Replies: 1,353

AF 447 Thread No. 7

Views: 300,798

Posted By Dani

CONFiture: it doesn't disappear, it...

CONFiture:

it doesn't disappear, it never appears.

I do not doubt this. Imagine: No valid speed, therefor several fault messages from/through ADR.

Forum: Tech Log

16th Nov 2011, 16:29

Replies: 1,353

AF 447 Thread No. 7

Views: 300,798

Posted By Dani

Sorry, wrote it in a hurry, but you are right. Of...

Sorry, wrote it in a hurry, but you are right. Of course these are new branches, and software engineers think like that. I have nothing against it. I just want to help non software engineers to think...

Forum: Tech Log

16th Nov 2011, 15:40

Replies: 1,353

AF 447 Thread No. 7

Views: 300,798

Posted By Dani

It's a big misconception that there is alternate...

It's a big misconception that there is alternate law in Airbus fbw software. Of course we call it alternate, but what it basically is is a degradation of normal law. There is only normal and direct...

Forum: Tech Log

15th Nov 2011, 12:06

Replies: 1,353

AF 447 Thread No. 7

Views: 300,798

Posted By Dani

Narval, I agree with all you are saying (except...

Narval, I agree with all you are saying (except that they didn't have dual input indications), but transport aircraft are never exposed to any of these flying condition, certainly not deadly ones...

Forum: Tech Log

8th Nov 2011, 21:38

Replies: 1,353

AF 447 Thread No. 7

Views: 300,798

Posted By Dani

Interesting discussion. Congratulations to Dozy...

Interesting discussion. Congratulations to Dozy for his field research. I do not doubt any second that what he experienced was very close to what did the crew of AF447.

Still this is no proof that...

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