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Search: Posts Made By: rudderrudderrat
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Forum: Tech Log
23rd May 2012, 18:39
Replies: 1,550
Views: 302,380
Posted By rudderrudderrat

Hi DozyWannabe, I agree. ...

Hi DozyWannabe,


I agree.

Unfortunately I think some pilots may rely on the Normal flight law protection too much. As Bruce Dickinson says in his video you posted on post#170 "Airbus...
Forum: Tech Log
19th May 2012, 11:54
Replies: 1,550
Views: 302,380
Posted By rudderrudderrat

Hi DozyWannabe, ...

Hi DozyWannabe,


http://www.blackholes.org.uk/PP/AF elevator2.jpg

The elevator basically follows the sidestick inputs up to 02:10:45 with deviations mostly around zero - which is what a...
Forum: Tech Log
17th May 2012, 22:28
Replies: 1,550
Views: 302,380
Posted By rudderrudderrat

Hi PJ2, I think ALT* became a protected...

Hi PJ2,


I think ALT* became a protected mode after this accident.
ASN Aircraft accident Airbus A330-321 F-WWKH Toulouse-Blagnac Airport (TLS)...
Forum: Tech Log
17th May 2012, 12:17
Replies: 1,550
Views: 302,380
Posted By rudderrudderrat

Hi DozyWannabe, I think with 2 or more ADRs...

Hi DozyWannabe,

I think with 2 or more ADRs disagreeing, the FDs bars will be removed, and all previous FD/AP modes are "forgotten".
When 2 or more ADRs agree, the FDs will reappear (because they...
Forum: Tech Log
15th May 2012, 17:54
Replies: 1,550
Views: 302,380
Posted By rudderrudderrat

Hi Lyman, I'd say the aircraft naturally wanted...

Hi Lyman,
I'd say the aircraft naturally wanted to lower it's nose as the speed washed off.
It was only due to the PF's mostly nose up ss demands, aided by full nose up stab trim, that he managed...
Forum: Tech Log
13th May 2012, 11:34
Replies: 1,550
Views: 302,380
Posted By rudderrudderrat

Hi HazelNuts39, Presumably alpha is measured...

Hi HazelNuts39,

Presumably alpha is measured real time and the airspeed can reduce if delta g is reduced during the apogee. It will take some time for the attitude of the aircraft to change in...
Forum: Tech Log
11th May 2012, 22:45
Replies: 1,550
Views: 302,380
Posted By rudderrudderrat

Hi DozyWannabe, That was the design concept...

Hi DozyWannabe,

That was the design concept - but sometimes the programmers haven't anticipated every possible eventuality. There have been several heavy landings where the ELAC computers...
Forum: Tech Log
11th May 2012, 20:40
Replies: 1,550
Views: 302,380
Posted By rudderrudderrat

Hi DozyWannabe, ...

Hi DozyWannabe,


http://www.davi.ws/avionics/TheAvionicsHandbook_Cap_11.pdf
"11.3 Design Philosophy.

More will be said of these specific features later. What should be noted, however, is that...
Forum: Tech Log
11th May 2012, 14:46
Replies: 1,550
Views: 302,380
Posted By rudderrudderrat

Hi DozyWannabe, If you read the cvr...

Hi DozyWannabe,

If you read the cvr transcript, both crew knew they were close to the stall.
Air Florida Flight 90 - Wikipedia, the free encyclopedia...
Forum: Tech Log
6th May 2012, 17:33
Replies: 1,550
Views: 302,380
Posted By rudderrudderrat

Hi DozyWannabe, Well I'm afraid we'll have...

Hi DozyWannabe,

Well I'm afraid we'll have to disagree on that one.

On the TriStar, operating to Bermuda with strong crosswinds and only Island Holding fuel, we would sometimes have to land in...
Forum: Tech Log
6th May 2012, 17:06
Replies: 1,550
Views: 302,380
Posted By rudderrudderrat

Hi DozyWannabe, I'm glad you raised this...

Hi DozyWannabe,


I'm glad you raised this one because it perfectly shows what happens when the crew don't realise how much aileron is being applied to satisfy their roll request. They both...
Forum: Tech Log
6th May 2012, 15:51
Replies: 1,550
Views: 302,380
Posted By rudderrudderrat

Hi DozyWannabe, It doesn't matter that the...

Hi DozyWannabe,

It doesn't matter that the flight surfaces are powered, it's more about being kept in the loop. e.g.
I can see the total fuel on board constantly, but the individual fuel tank...
Forum: Tech Log
6th May 2012, 11:50
Replies: 1,550
Views: 302,380
Posted By rudderrudderrat

Hi A33Zab, I don't know if you are referring to...

Hi A33Zab,
I don't know if you are referring to some incident (link?) which I don't know about.
On the TriStar we could split the Capts & FO's load paths to the L & R elevators and L & R ailerons...
Forum: Tech Log
6th May 2012, 10:23
Replies: 1,550
Views: 302,380
Posted By rudderrudderrat

Hi HazelNuts39, I think you are probably...

Hi HazelNuts39,

I think you are probably correct.
I hadn't thought through the logic of the dynamic stall margin being presented as a %age of what's displayed.
Forum: Tech Log
6th May 2012, 09:33
Replies: 1,550
Views: 302,380
Posted By rudderrudderrat

Hi HazelNuts39, Please see John T's...

Hi HazelNuts39,

Please see John T's explanation http://www.pprune.org/tech-log/484457-aoa-asi-low-speed-awareness-2.html.
If the stall speed is calculated as being X kts and superimposed on the...
Forum: Tech Log
6th May 2012, 08:52
Replies: 1,550
Views: 302,380
Posted By rudderrudderrat

control surface deflection

Hi HazelNuts39,
We have that system already. With blocked pitots and your IAS shows say 60 kts, then the superimposed stall speed is uselessly displayed off scale.

control surface deflection:...
Forum: Tech Log
5th May 2012, 14:28
Replies: 1,550
Views: 302,380
Posted By rudderrudderrat

position relative feed back side sticks

Hi DozyWannabe,

The Airbus side stick system lacks the "position of the control surface feed back loop" to the pilot. We have no easy way to sense how much control surface deflection is required...
Forum: Tech Log
29th Apr 2012, 11:09
Replies: 1,550
Views: 302,380
Posted By rudderrudderrat

Hi mm43, I think the clockwise heading...

Hi mm43,

I think the clockwise heading change was due to adverse aileron drag when the wing was stalled. The differential spoilers would have been ineffective in the turbulent flow above the...
Forum: Tech Log
26th Apr 2012, 18:53
Replies: 1,550
Views: 302,380
Posted By rudderrudderrat

Hi DozyWannabe, It holds the last setting.

Hi DozyWannabe,
It holds the last setting.
Forum: Tech Log
26th Apr 2012, 18:10
Replies: 1,550
Views: 302,380
Posted By rudderrudderrat

Hi DozyWannabe, On reflection, I think the...

Hi DozyWannabe,

On reflection, I think the side slip trace has some error - I can't see why it would peak at -10 so regularly. So ignoring that:

If you look at Aileron Displacement, before AP...
Forum: Tech Log
26th Apr 2012, 16:24
Replies: 1,550
Views: 302,380
Posted By rudderrudderrat

Hi DozyWannabe & salute Gums, On page 112...

Hi DozyWannabe & salute Gums,

On page 112 Lateral parameters, Estimated side slip shows a distinct asymmetry after the AP disengaged. If I'm reading the trace correctly, it shows a Left Hand side...
Forum: Tech Log
26th Apr 2012, 14:20
Replies: 1,550
Views: 302,380
Posted By rudderrudderrat

Hi DozyWannabe, From Page 88. "The A/P2...

Hi DozyWannabe,

From Page 88.
"The A/P2 disconnects. The roll angle changes from 0 to 8.4° in 2 seconds whereas the sidestick is at neutral. The pitch attitude is 0°."

I'm sure they would have...
Forum: Tech Log
23rd Apr 2012, 17:09
Replies: 1,550
Views: 302,380
Posted By rudderrudderrat

Hi CONF iture The only similarity between...

Hi CONF iture

The only similarity between the accident reports for Habsheim http://www.bea.aero/docspa/1988/f-kc880626/pdf/f-kc880626.pdf and AF744 is that both have the CVR transcript & Flight...
Showing results 1 to 23 of 23


 
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