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Search: Posts Made By: mm43
Showing results 1 to 35 of 45
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Forum: Tech Log
11th Jun 2011, 21:59
Replies: 2,070
Views: 612,141
Posted By mm43

Bearfoil; The following graphic (an adaption of...

Bearfoil;
The following graphic (an adaption of one originally posted by Tailspin Turtle) should help with the conception. Note that all the speeds are in terms of GS and that the THS angle of...
Forum: Tech Log
11th Jun 2011, 20:33
Replies: 2,070
Views: 612,141
Posted By mm43

Hi Bear; At its zenith ...At that point the...

Hi Bear;

At its zenith ...At that point the v/s became rapidly -10k ft/min and the AoA continued to increase except for a short period when ND inputs were made and the SW sounded again.
Forum: Tech Log
10th Jun 2011, 23:08
Replies: 2,070
Views: 612,141
Posted By mm43

Hi Bear; Possibly the Captain asked to see...

Hi Bear;

Possibly the Captain asked to see the FPV page, and the PNF/PF comments confirmed no FPV and or any other valid data. I don't think their selecting the FPV pages just prior to 0212 was a...
Forum: Tech Log
10th Jun 2011, 22:46
Replies: 2,070
Views: 612,141
Posted By mm43

Valid Indications?

Just a reminder that sometime between 02:11:51 and 02:11:59 both PFD's had the FPV page selected. Reference to the ACARS messages (http://countjustonce.com/a330/acars.html) will show these two...
Forum: Tech Log
7th Jun 2011, 21:30
Replies: 2,070
Views: 612,141
Posted By mm43

A very enlightening post. Manual inputs to...

A very enlightening post.

Manual inputs to the trim wheel override PRIM THS orders and the actuals are recalculated. That is how I understand it, and by implication, the PF could have braced...
Forum: Tech Log
7th Jun 2011, 20:22
Replies: 2,070
Views: 612,141
Posted By mm43

In the first instance, you should be made aware...

In the first instance, you should be made aware of a Flight Global report (http://www.flightglobal.com/articles/2011/06/01/357394/stalled-af447-did-not-switch-to-abnormal-attitude-law.html)...
Forum: Tech Log
7th Jun 2011, 05:14
Replies: 2,070
Views: 612,141
Posted By mm43

Ok, that's what I wanted to hear..., from someone...

Ok, that's what I wanted to hear..., from someone who actually flies the A332. But while on the subject, have you any personal ideas of how best to ensure that the PNF knows what the PF is doing with...
Forum: Tech Log
6th Jun 2011, 22:11
Replies: 2,070
Views: 612,141
Posted By mm43

Side-stick Position

Having noted a few comments about the PNF not knowing what the PF is doing with the side-stick, it is worth noting that in the Ground Mode after start-up the side-stick position is shown on each PFD....
Forum: Tech Log
5th Jun 2011, 20:35
Replies: 2,070
Views: 612,141
Posted By mm43

Garrison Go back to post #1396...

Garrison
Go back to post #1396 (http://www.pprune.org/tech-log/452836-af447-thread-no-3-a-70.html#post6494169) by grity, where you will find some interesting basic concepts. Also have a look at a...
Forum: Tech Log
5th Jun 2011, 20:20
Replies: 2,070
Views: 612,141
Posted By mm43

Abnormal Attitude Law

A33Zab
The above has been the accepted list of "triggers" for this event, and looking at the list you would assume that either of the 5 noted conditions would be the "trigger". It now appears, if...
Forum: Tech Log
3rd Jun 2011, 22:56
Replies: 2,070
Views: 612,141
Posted By mm43

Thought my graphic clearly stated in the title -...

Thought my graphic clearly stated in the title - Final Data -, i.e. FL0.

The BEA have indicated that at TOC (FL380) the pitch attitude and AoA were both 16° and the stall was established at that...
Forum: Tech Log
3rd Jun 2011, 05:35
Replies: 2,070
Views: 612,141
Posted By mm43

Graybeard The BEA gave two components:- ...

Graybeard

The BEA gave two components:-
So, I don't understand how you have determined the near zero horizontal velocity.
Forum: Tech Log
3rd Jun 2011, 05:21
Replies: 2,070
Views: 612,141
Posted By mm43

Effectiveness of Rudder?

If you go back to Tailspin Turtle's last graphic, it is easy to see that the airflow around the empennage and over the THS will create a turbulent mush over the rudder, making the rudder IMO useless.
Forum: Tech Log
3rd Jun 2011, 02:54
Replies: 2,070
Views: 612,141
Posted By mm43

Two graphics showing exactly the same data, just...

Two graphics showing exactly the same data, just in different ways.;)
Forum: Tech Log
3rd Jun 2011, 02:23
Replies: 2,070
Views: 612,141
Posted By mm43

The graphic I put up on the previous page is...

The graphic I put up on the previous page is using the BEA's data at impact. You are not telling me they read that data out incorrectly?
Forum: Tech Log
3rd Jun 2011, 01:34
Replies: 2,070
Views: 612,141
Posted By mm43

If the horizontal component increased due to...

If the horizontal component increased due to additional power and the RoD remained essentially the same, the AoA will have decreased. Do you want me to stretch the graphic to prove it?
Forum: Tech Log
3rd Jun 2011, 01:21
Replies: 2,070
Views: 612,141
Posted By mm43

AF447 - Descent Profile at Impact

For those who need some help in envisaging what a high Angle of Attack looks like and how it will affect the pitot data, the following graphic should help.

http://oi51.tinypic.com/201mky.jpg

It...
Forum: Tech Log
2nd Jun 2011, 03:22
Replies: 2,070
Views: 612,141
Posted By mm43

Machinbird Good post. I've got an impression...

Machinbird
Good post. I've got an impression that there will have been a very disturbed airflow over the rudder, and with the AoA and the existing RTLU limitations, the +/-7.9° available may not be...
Forum: Tech Log
31st May 2011, 21:44
Replies: 2,070
Views: 612,141
Posted By mm43

Graybeard; You are right, it didn't. I was...

Graybeard;
You are right, it didn't.

I was aiming more at the ALT erroneous speed correction component, and its rate of change which may have been too much for the TCAS. The problem right now is...
Forum: Tech Log
31st May 2011, 20:12
Replies: 2,070
Views: 612,141
Posted By mm43

MurphyWasRight; Grizzled; Re post #864......

MurphyWasRight; Grizzled;

Re post #864... :ok:

HN39;

Thanks for the TE Plot.
Forum: Tech Log
31st May 2011, 09:05
Replies: 2,070
Views: 612,141
Posted By mm43

RealQuax The Tim Vasquez profile chart is...

RealQuax

The Tim Vasquez profile chart is probably as good as it will get. At this time we don't know if the aircraft had deviated clear of the main Cb cells, but its position along the track was...
Forum: Tech Log
31st May 2011, 08:09
Replies: 2,070
Views: 612,141
Posted By mm43

HN39 Should have read the report again! Many...

HN39
Should have read the report again! Many thanks and I have corrected the error.
Forum: Tech Log
31st May 2011, 07:16
Replies: 2,070
Views: 612,141
Posted By mm43

fizz57 Boeing use the inertial method, and...

fizz57
Boeing use the inertial method, and Airbus use barometric vertical speed and inertial groundspeed and attitude.
Forum: Tech Log
31st May 2011, 05:55
Replies: 2,070
Views: 612,141
Posted By mm43

Graybeard Yesterday when posting the FDR...

Graybeard

Yesterday when posting the FDR traces for the Jetstar A330 incident, I mulled over the static port problem, then looked at the ECAM messages and realized that the sequence of events was...
Forum: Tech Log
31st May 2011, 05:01
Replies: 2,070
Views: 612,141
Posted By mm43

JD-EE Undoubtedly! It would appear that no-one...

JD-EE
Undoubtedly! It would appear that no-one anticipated an approach to a stall that wouldn't under normal circumstances be dealt with correctly. In this case it wasn't, and degradation of...
Forum: Tech Log
31st May 2011, 01:55
Replies: 2,070
Views: 612,141
Posted By mm43

That's the next problem! Once the IAS has dropped...

That's the next problem! Once the IAS has dropped below 60KTS, the aircraft is in Abnormal Law and the THS must be adjusted manually.
Forum: Tech Log
31st May 2011, 01:34
Replies: 2,070
Views: 612,141
Posted By mm43

That is the bit that seems to have got them...

That is the bit that seems to have got them totally confused.

The AoA vane plus IAS provides the stall warning. Only problem is that the IAS must be greater than 60KTS for the combo to provide...
Forum: Tech Log
30th May 2011, 20:04
Replies: 2,070
Views: 612,141
Posted By mm43

Back in post #260 I made some assumptions about...

Back in post #260 I made some assumptions about the THS and the AoA. The basic post is repeated below with a small addendum and should be self explanatory.
My interpretation is that the aircraft...
Forum: Tech Log
30th May 2011, 19:33
Replies: 2,070
Views: 612,141
Posted By mm43

They were dealing with the FDR and CVR, and it...

They were dealing with the FDR and CVR, and it may well be that data will be available from the QAR. I doubt if we will know that until the next Interim Report.
Forum: Tech Log
30th May 2011, 19:25
Replies: 2,070
Views: 612,141
Posted By mm43

What we are up against here, is that the BEA has...

What we are up against here, is that the BEA has provided a brief description of what happened, but not why. In that context the ACARS message you have mentioned is a "maintenance" message that is...
Forum: Tech Log
30th May 2011, 05:52
Replies: 2,070
Views: 612,141
Posted By mm43

falcor Have a look at A340 / A330 Control:...

falcor

Have a look at A340 / A330 Control: flight & laws (http://countjustonce.com/a330/a330-flight-laws.html)
Forum: Tech Log
30th May 2011, 05:24
Replies: 2,070
Views: 612,141
Posted By mm43

28 October 2009 - VH-EBA - Airbus A330-202

The only relation this incident has to AF447 is that the aircraft was an A332 and UAS was due to ice in the static port. A stall warning did not enter the equation, but similar warnings were...
Forum: Tech Log
30th May 2011, 01:16
Replies: 2,070
Views: 612,141
Posted By mm43

PJ2 Welcome back, and thanks for the timely...

PJ2
Welcome back, and thanks for the timely reminder!

There is something about the AP/ATHR OFF that may be related to the questions takata is/was posing. Svarin has also shown keen interest in...
Forum: Tech Log
30th May 2011, 00:37
Replies: 2,070
Views: 612,141
Posted By mm43

The answer is undoubtedly related to these:- ...

The answer is undoubtedly related to these:-

2:11:49 FLR/FR0906010210 34111506EFCS2 1,EFCS1,AFS,,,,,PROBE-PITOT 1X2 / 2X3 / 1X3 (9DA),HARD
2:11:55 FLR/FR0906010210 27933406EFCS1...
Forum: Tech Log
29th May 2011, 22:05
Replies: 2,070
Views: 612,141
Posted By mm43

Something that is apparent to me, is that once...

Something that is apparent to me, is that once the aircraft was in the fully developed stall, the right roll was effectively a side-slip/bank as the direction of flight changed and became stabilized...
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