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Search: Posts Made By: RR_NDB
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Forum: Tech Log
21st Oct 2011, 01:26
Replies: 1,688
Views: 405,762
Posted By RR_NDB

Vanished info other than (not measured) AS

:ok:

FDR in this case may not allow a "complete understanding". Lacks important info inside the loop (a/c-PF)
Forum: Tech Log
21st Oct 2011, 00:56
Replies: 1,688
Views: 405,762
Posted By RR_NDB

Bureaucracy x good Engineering

Hi,



IMHO this is RIDICULOUS. Just waiting for going directly from Normal Law to Murphy Law. :ECertification "principle" is not being properly used. The bureaucrats (of low qualification:}) are...
Forum: Tech Log
20th Oct 2011, 23:26
Replies: 1,688
Views: 405,762
Posted By RR_NDB

AoA an other unusual conditions

Why not to present this (important) info when AoA nears safe limits? Could be triggered by "rate". Warning a fast closing in to a dangerous condition. Requiring immediate action.

Certainly not...
Forum: Tech Log
8th Oct 2011, 19:33
Replies: 1,688
Views: 405,762
Posted By RR_NDB

Sub heated Pitot's

Important issue to be discussed. Simple devices with so much (Systemic) responsibility, that failed in AF447? and triggered the sequence of events.

1) System redundancy techniques are good for...
Forum: Tech Log
4th Oct 2011, 17:43
Replies: 1,688
Views: 405,762
Posted By RR_NDB

K.I.S.S.

Hi,

aitren:

:ok::ok::ok: (http://www.pprune.org/tech-log/460625-af-447-thread-no-6-a-55.html#post6733381)

And despite this immense complexity the basic is the same:

When the plane...
Forum: Tech Log
3rd Oct 2011, 05:55
Replies: 1,688
Views: 405,762
Posted By RR_NDB

Airliners degradation (design flaws, SW bugs, incorrect algorithms, MEL issues, etc)

When facing important failures (design flawns, algorithms, etc.) you must be able to aviate and "accomplish your mission". A pilot MUST know how to, INDEPENDENTLY of the degree of TYPICAL degradation...
Forum: Tech Log
1st Oct 2011, 20:03
Replies: 1,688
Views: 405,762
Posted By RR_NDB

T.R.A.P.

:E:E:E:E

Trimmable Resource Automatically Positioned

:}:}:}:}

PS

The designers made the algorithms. And the a/c' s really (BEA said) worked as designed.
Forum: Tech Log
1st Oct 2011, 19:41
Replies: 1,688
Views: 405,762
Posted By RR_NDB

System Engineering Design Philosophy

Automation helps but can create very dangerous situations as all of us know. This danger increases when the designers creates “tools” to help the operator introducing a “partner” with high hierarchy....
Forum: Tech Log
1st Oct 2011, 15:04
Replies: 1,688
Views: 405,762
Posted By RR_NDB

Combinational logic x Sequential logic

In Combinational logic (http://en.wikipedia.org/wiki/Combinational_logic) " the output is a pure function of the present input only". E.g. the (interlock) micro switch on the door of a Cessna...
Forum: Tech Log
1st Oct 2011, 03:40
Replies: 1,688
Views: 405,762
Posted By RR_NDB

K.I.S.S. design rule

Cool Guys (http://www.pprune.org/tech-log/460625-af-447-thread-no-6-a-52.html#post6727693)

The rule is here:

KISS principle (http://en.wikipedia.org/wiki/KISS_principle)

And the best phrase,...
Forum: Tech Log
30th Sep 2011, 19:13
Replies: 1,688
Views: 405,762
Posted By RR_NDB

Reality is richer than any Design could anticipate

Hi,

[URL="http://www.pprune.org/tech-log/460625-af-447-thread-no-6-a-51.html#post6727280"]

With highly capable pilots instead of just "trained operators".

IMO the training requirements are...
Forum: Tech Log
30th Sep 2011, 17:46
Replies: 1,688
Views: 405,762
Posted By RR_NDB

Finite-state machine in FBW a/c

Hi,

FBW is clearly a way to optimize an a/c. (weight reduction, easier to design with redundancy, etc.)

Question for EE and pilots acquainted with Digital FBW a/c:

The problems arise when...
Forum: Tech Log
28th Sep 2011, 13:34
Replies: 1,688
Views: 405,762
Posted By RR_NDB

Crew decision (and not automatically decided by the System)

Hi,

mm43 @ #1005



I would prefer to decide when to use the last resort. My understanding of "big red button" is of a resource not offered automatically by the System. A resource to be used...
Forum: Tech Log
28th Sep 2011, 01:07
Replies: 1,688
Views: 405,762
Posted By RR_NDB

Contrary to Airbus SAS philosophy?

Hi,



Dificult to imagine a change in their minds to implement this (very reasonable) last resort. :E "Collision" of K.I.S.S. x K.I.C.S.

Complex Systems can deliver, at certain situations,...
Forum: Tech Log
28th Sep 2011, 00:46
Replies: 1,688
Views: 405,762
Posted By RR_NDB

Stimuli in order to be able to analyze a/c "behavior"

Hi,

A lot of sense considering he was always trying to "understand".



(http://www.pprune.org/report.php?p=6722353)
Forum: Tech Log
21st Aug 2011, 22:34
Replies: 1,688
Views: 405,762
Posted By RR_NDB

On failures

3holelover,

IMO Airbus SAS failed: There are some ways to present to the crew an imediate understanding and even ways to keep a/c in Normal Law after UAS (an old and well understood problem due...
Forum: Tech Log
21st Aug 2011, 20:28
Replies: 1,688
Views: 405,762
Posted By RR_NDB

Machinbird :ok: And during extreme...

Machinbird :ok:

And during extreme situations this can be simply vital.
Forum: Tech Log
21st Aug 2011, 18:50
Replies: 1,688
Views: 405,762
Posted By RR_NDB

Real time relevant information to the crew

Hi,

GerardC :ok:

I posted earlier on that. And considering the a/c was starting to operate "outside design" (sub heated pitot's) the information of what caused AP/AT out SHOULD BE PRESENTED...
Forum: Tech Log
21st Aug 2011, 16:49
Replies: 1,688
Views: 405,762
Posted By RR_NDB

The "inputs" PF (and crew) received

Hi,

dufc,

The "information" (we don't have it) PF received (when a/c was operating outside* it's design) led him to an "strange behavior". We need more info to understand...
Showing results 1 to 19 of 19


 
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