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Search: Posts Made By: Svarin
Showing results 1 to 35 of 79
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Forum: Tech Log
3rd Feb 2013, 11:54
Replies: 71
Views: 18,796
Posted By Svarin

Well said !

Thank you Centaurus for this perfectly made point of no-nonsense aviation.

May you be heard loud and clear by those who need to hear you.

Svarin
Forum: Tech Log
2nd Sep 2011, 09:14
Replies: 1,688
Views: 406,128
Posted By Svarin

PIO/APC

Clandestino wrote (about PIO/APC) :
Indeed, when the aircraft is fully stalled and mushing, and PF is holding full deflection left-up on his sidestick, and he is not touching the rudder pedals, yaw...
Forum: Tech Log
1st Sep 2011, 21:22
Replies: 1,688
Views: 406,128
Posted By Svarin

Rudder

DozyWannabe dared writing :

Read the report in full, including page 1xx where you will find the rudder traces. Just because BEA did not expand on the subject does not mean it is irrelevant.

You...
Forum: Tech Log
6th Jul 2011, 06:02
Replies: 1,069
Views: 280,101
Posted By Svarin

Ongoing certification process

syseng68k,

thank you for your response regarding "certification after initial" for computers and other parts. Will look it up.

Do you mean subsystems inside one given computer/unit, inside one...
Forum: Tech Log
5th Jul 2011, 00:25
Replies: 1,069
Views: 280,101
Posted By Svarin

Automation & FCPCs

A33Zab wrote :

I agree that it can be done. But is it desirable, from a human perspective ? After flying, what else would you latch automation upon ? How many human endeavours will end up...
Forum: Tech Log
5th Jul 2011, 00:12
Replies: 1,069
Views: 280,101
Posted By Svarin

DozyW wrote : You need to realize that each...

DozyW wrote :

You need to realize that each successive software version, for the FCPCs, for example, would have a lifespan of around a year. Version 19 was out last time I checked. What is the age...
Forum: Tech Log
24th Jun 2011, 19:41
Replies: 1,069
Views: 280,101
Posted By Svarin

PJ2, Thank you for this discussion...

PJ2,

Thank you for this discussion opportunity. Such is what I am looking for.

The failures that I am putting forward are very simple :
- the probes failure, triggering the monitoring process...
Forum: Tech Log
24th Jun 2011, 15:31
Replies: 1,069
Views: 280,101
Posted By Svarin

PRIMS workings

Thank you very much A33Zab for this great technically enlightening information.

I will repeat again that I do not believe this design would be flawed in general, but that it ended up in an...
Forum: Tech Log
23rd Jun 2011, 21:19
Replies: 1,069
Views: 280,101
Posted By Svarin

Questions & Comments

PJ2, in answer to your post #258 :

More accurately, it did not remain in Normal, it would have returned to it at the end of the 10 seconds monitoring process. This ADRs monitoring process by PRIMs...
Forum: Tech Log
22nd Jun 2011, 20:11
Replies: 1,069
Views: 280,101
Posted By Svarin

Thank you for taking the time to discuss...

Thank you for taking the time to discuss seriously. I will now make a full review of PJ2 very sharp questions and hopefully come up with decent postable answers within 48 hours.

My opinion on the...
Forum: Tech Log
21st Jun 2011, 21:24
Replies: 1,069
Views: 280,101
Posted By Svarin

mm43, no worries, I thought a clear summary...

mm43,

no worries, I thought a clear summary of that particular bit might help all readers. Hope it was clear enough. Best regards.
Forum: Tech Log
21st Jun 2011, 21:06
Replies: 1,069
Views: 280,101
Posted By Svarin

Mean & Median

mm43 wrote regarding redundant ADR airspeed data used by PRIMs :

Respectfully disagreeing here, the information I have says :

When THREE sources are available, median value is used. That is,...
Forum: Tech Log
20th Jun 2011, 19:12
Replies: 1,069
Views: 280,101
Posted By Svarin

Lonewolf_50 writes : Yes, my set of...

Lonewolf_50 writes :

Yes, my set of hypotheses sees it having worked as programmed, not as expected, even by its designers, making the expression by design completely meaningless.

Lonewolf_50...
Forum: Tech Log
20th Jun 2011, 15:00
Replies: 1,069
Views: 280,101
Posted By Svarin

Governing control law ?

BOAC asked :

A simplified approach to this problem is to examine which computer governs which flight control surface, and examine carefully how the different flight laws work, and how they...
Forum: Tech Log
20th Jun 2011, 14:32
Replies: 1,069
Views: 280,101
Posted By Svarin

BOAC asked : BOAC, your questions are all...

BOAC asked :
BOAC, your questions are all related to what the crew is being provided as indications on their instrument panel. What I am dealing with is computerized flight controls.

ASIs were...
Forum: Tech Log
20th Jun 2011, 13:23
Replies: 1,069
Views: 280,101
Posted By Svarin

ADR DISAGREE and others

CONF iture asked :

I will summarize very quickly here :

At the start of accident sequence, two apparently unrelated faults :
PROBE PITOT 1X2/2X3/1X3
WRG:ADIRU1 BUS ADR1-2 TO FCPC2

PROBE...
Forum: Tech Log
14th Jun 2011, 10:44
Replies: 2,070
Views: 612,912
Posted By Svarin

A33Zab, post #1571 I have studied carefully...

A33Zab, post #1571

I have studied carefully what you posted. I decided to leave your own post in full and add my own commentary/questions in the middle. This is because your post addresses one set...
Forum: Tech Log
13th Jun 2011, 16:03
Replies: 2,070
Views: 612,912
Posted By Svarin

WRG

A33Zab : thank you for this

Now this is very interesting :

Do you remember the timing for ADR DISAGREE in this accident sequence ? Time-stamp from CMC says 02:12 if I remember correctly. Can...
Forum: Tech Log
12th Jun 2011, 21:42
Replies: 2,070
Views: 612,912
Posted By Svarin

Machinbird : thanks for the expanded curves,...

Machinbird : thanks for the expanded curves, greatly interesting and informative.

Mr Optimistic : Yes, indeed. I tend to incline towards software versions that could communicate very well under...
Forum: Tech Log
12th Jun 2011, 20:11
Replies: 2,070
Views: 612,912
Posted By Svarin

Computers

Gentlemen,

computers will always do what their programming tells them to do. Sure.

First caveat is "programming" takes human beings, who make mistakes, be they engineers in a design committee,...
Forum: Tech Log
27th May 2011, 23:51
Replies: 2,070
Views: 612,912
Posted By Svarin

The Last Effort

Gentlemen,

after this one, I will take an extended leave from pprune. The hairy troll gets hungry and will go out to pick mushrooms. I have worked way too hard on this, and my life (yes I do have...
Forum: Tech Log
27th May 2011, 16:49
Replies: 2,070
Views: 612,912
Posted By Svarin

Manual pitch trim (3)

takata wrote :

Regarding manual pitch trim, the design and associated training is thus :

Normal law : auto-trim. Dont touch it or fail the test and get fired. 99.9999% of the time for airline...
Forum: Tech Log
27th May 2011, 16:21
Replies: 2,070
Views: 612,912
Posted By Svarin

studi wrote : No.

studi wrote :



No.
Forum: Tech Log
27th May 2011, 15:21
Replies: 2,070
Views: 612,912
Posted By Svarin

Manual pitch trim (2)

In the Perpignan accident, manual pitch trim was not used.
In this accident, it would appear it was not used either.

The fact that the manufacturer left this manual pitch trim wheel in the...
Forum: Tech Log
27th May 2011, 14:41
Replies: 2,070
Views: 612,912
Posted By Svarin

Manual pitch trim

takata, have you ever flown an Airbus ? Have you ever trained for type rating on either 320, 330, 340 or 380 ? I will tell you a ghastly secret : using manual pitch trim is one of the very first...
Forum: Tech Log
27th May 2011, 14:15
Replies: 2,070
Views: 612,912
Posted By Svarin

Stall training

takata wrote :

Agreed.

PENKO wrote :

Agreed, too.

One hypothesis is along the lines of "stall training" such as airline pilots usually get during recurrent simulator training. Since the...
Forum: Tech Log
27th May 2011, 12:01
Replies: 2,546
Views: 932,508
Posted By Svarin

BEA facts document

If mm43 looks disappointed, I find much in this factual report.

The main theory of a deep stall from altitude is validated. An initial climb, preceding the final descent, is established.

Many...
Forum: Tech Log
27th May 2011, 10:36
Replies: 2,546
Views: 932,508
Posted By Svarin

Svarin : [...] Then why the aircraft that can be...

Svarin : [...] Then why the aircraft that can be flown by "concierges" ? [...]

DozyWannabe : these controversial things 24 years ago [...] this should be disregarded [...] Airbus have acknowledged...
Forum: Tech Log
26th May 2011, 12:44
Replies: 2,546
Views: 932,508
Posted By Svarin

Philosophy

It must be stressed here, mostly to attention of the potential reading public, that safety, especially safety as a statistic, is not at stake when discussing the various merits or failings of this or...
Forum: Tech Log
26th May 2011, 12:26
Replies: 2,546
Views: 932,508
Posted By Svarin

infrequentflyer789 wrote : Then why the...

infrequentflyer789 wrote :

Then why the aircraft that can be flown by "concierges" ? If not to recruit, train, pay, and respect pilots like "concierges" ? Remember the late eighties. Refusing to...
Forum: Tech Log
26th May 2011, 11:16
Replies: 2,546
Views: 932,508
Posted By Svarin

What has changed ?

Gibon2,

you are absolutely right.

Did the aircraft change over the years ? Yes and No. No it did not go through any kind of major re-design, and its various versions are quite stable. Yes,...
Forum: Tech Log
26th May 2011, 07:25
Replies: 2,546
Views: 932,508
Posted By Svarin

FBW article

Machinbird posted a link to an article by F/O Stowe from Delta.

I cannot resist quoting this :

Thank you, Officer Stowe. I feel suddenly very much less alone.
Forum: Tech Log
23rd May 2011, 09:10
Replies: 2,546
Views: 932,508
Posted By Svarin

Wiring fault

RR-NDB wrote and quoted one of my posts :

RR-NDB, there are two very different considerations related to this wiring fault. The first is why did it happen ? Your question. The second is what are...
Forum: Tech Log
19th May 2011, 15:06
Replies: 2,546
Views: 932,508
Posted By Svarin

Flight Control Laws

Gentlemen,

if I may, I intend to shed some more light on this touchy matter of Flight Control Laws on the accident type.

Each Flight Control Primary Computer will perform its own computations,...
Forum: Tech Log
7th May 2011, 19:28
Replies: 2,546
Views: 932,508
Posted By Svarin

Putting some things together

Gentlemen,

my thanks to oldengmkr for posting some links of high interest.

To the attention of those interested in my preferred subject which is flight controls and their potential for lethal...
Showing results 1 to 35 of 79
 
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