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Forum: Tech Log

14th Jun 2011, 01:14

Replies: 2,070

AF447 Thread No. 3

Views: 611,976

Posted By deSitter

Deep stall recovery

How would you recover from a deep stall in a twin-turbofan conventional tailplane aircraft? Do you create a lot of asymmetrical thrust to either create a big side-slip and possibly large bank angle,...

Forum: Tech Log

7th Jun 2011, 18:40

Replies: 2,070

AF447 Thread No. 3

Views: 611,976

Posted By deSitter

A constant descent rate = no vertical...

A constant descent rate = no vertical acceleration = 1 g. However the out-of-vertical part would be sensible if the attitude of the plane was more than 15 degrees nose up. The plane would appear...

Forum: Tech Log

6th Jun 2011, 01:22

Replies: 2,070

AF447 Thread No. 3

Views: 611,976

Posted By deSitter

It's clear what happened

No one understands where the border between man and machine lies, man has become a kiss-up to machine in order to have a job, machine is just doing what it's told by people who do not actually ever...

Forum: Tech Log

2nd Jun 2011, 13:10

Replies: 2,070

AF447 Thread No. 3

Views: 611,976

Posted By deSitter

Huttig?

BOAC above presented a report from Der Spiegel that a certain Prof. Huettig had re-created the incident in the simulator - the THS went up and stayed there - curtains. This seems to me to be the...

Forum: Tech Log

29th May 2011, 13:01

Replies: 2,070

AF447 Thread No. 3

Views: 611,976

Posted By deSitter

This is implicitly very revealing of the software...

This is implicitly very revealing of the software mentality - abstracting away the real world until all that's left is "flight", even though the missions and envelopes and hardware are completely...

Forum: Tech Log

29th May 2011, 12:32

Replies: 2,070

AF447 Thread No. 3

Views: 611,976

Posted By deSitter

Yep, this is the reaction to failed software -...

Yep, this is the reaction to failed software - add more features that will ultimately fail.

The point is, if IAS goes south, you put the thrust at 80% and keep the nose at 3 degrees and then fly...

Forum: Tech Log

29th May 2011, 01:27

Replies: 2,070

AF447 Thread No. 3

Views: 611,976

Posted By deSitter

techgeek said That misses the point...

techgeek said

That misses the point completely. I know there are great people writing software - the problem is not with the people, it's with the methodology, or philosophy, or whatever you want...

Forum: Tech Log

28th May 2011, 17:43

Replies: 2,070

AF447 Thread No. 3

Views: 611,976

Posted By deSitter

Well my animus for software "engineering" is...

Well my animus for software "engineering" is hereby exhibited - all the fancy laws and protection modes had the precise effect of sending 228 people to the bottom because they dealt with meaningless...

Forum: Tech Log

28th May 2011, 06:46

Replies: 2,070

AF447 Thread No. 3

Views: 611,976

Posted By deSitter

There should be an engineer on board whose job is...

There should be an engineer on board whose job is to know the aircraft systems in his bones, not to fly the airplane, or at least not primarily to fly the airplane.

-drl

Forum: Tech Log

27th May 2011, 21:45

Replies: 2,070

AF447 Thread No. 3

Views: 611,976

Posted By deSitter

Oh boy this is an understatement. There aren't...

Oh boy this is an understatement. There aren't many chapters in aviation history as sad as this one. One finds oneself grasping at straws to understand it :(

Forum: Tech Log

27th May 2011, 19:26

Replies: 2,070

AF447 Thread No. 3

Views: 611,976

Posted By deSitter

Stupid question?

How would the airplane behave if its fin came off in the zoom? Wouldn't it start Dutch rolling?

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