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Search: Posts Made By: ChristiaanJ
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Forum: Rumours & News
16th Aug 2009, 20:18
Replies: 3,239
Views: 1,137,519
Posted By ChristiaanJ

We're now at 130 pages with really nothing new on...

We're now at 130 pages with really nothing new on the subject.

I'm "unsubscribing".... keeps down my incoming e-mail.

Maybe when there's something really new, there will be another thread.

CJ
Forum: Rumours & News
6th Aug 2009, 20:15
Replies: 3,239
Views: 1,137,519
Posted By ChristiaanJ

I followed most of the thread, so my remark is...

I followed most of the thread, so my remark is not meant to be fatuous, just very summary...

Says who?
Or was this the icicle that broke off the glacier and broke the camel's back?
Or the slush...
Forum: Rumours & News
3rd Aug 2009, 23:50
Replies: 3,239
Views: 1,137,519
Posted By ChristiaanJ

Ed, I happen to be an aeronautical engineer,...

Ed,
I happen to be an aeronautical engineer, and I know that.....

But when I designed in a 1% resistor into an AFCS system, I already knew it would be at least that, and more likely 0.2%. And...
Forum: Rumours & News
3rd Aug 2009, 22:06
Replies: 3,239
Views: 1,137,519
Posted By ChristiaanJ

Your remark triggered a thought..... Of course...

Your remark triggered a thought.....
Of course it doesn't belong there, and neither do other contaminants.
Yet they get in there sooner or later.
So, shouldn't a fuel system be designed from the...
Forum: Rumours & News
12th Nov 2008, 20:45
Replies: 3,239
Views: 1,137,519
Posted By ChristiaanJ

Green-dot, lomapaseo, Funny, really. I've...

Green-dot, lomapaseo,
Funny, really.
I've always used "working hypothesis" as my 'worldview system'.

As a mere human, with limited knowledge, that's all one can do.

To me, "God" is a...
Forum: Rumours & News
5th Nov 2008, 22:55
Replies: 3,239
Views: 1,137,519
Posted By ChristiaanJ

Guys, Be reasonable, and read GFYA's post...

Guys,
Be reasonable, and read GFYA's post properly.
He is saying cavitation damage may be pointing a finger, but is not unique to this case, if I read it properly.

lomapaseo, I agree he should...
Forum: Rumours & News
11th Sep 2008, 19:09
Replies: 3,239
Views: 1,137,519
Posted By ChristiaanJ

I find myself staring at a figure for water (138...

I find myself staring at a figure for water (138 gallons in the centre tank alone!) more than two orders of magnitude larger than the the 5 litres (40 ppm) quoted in the AAIB report, yet "acceptable"...
Forum: Rumours & News
11th Sep 2008, 17:33
Replies: 3,239
Views: 1,137,519
Posted By ChristiaanJ

It's what keeps bothering me too. So far,...

It's what keeps bothering me too.
So far, nothing yet points to something 'uniquely unique' in what? 6.5M flights?
Yet we do not have 777s scattered just short of the threshold all along similar...
Forum: Rumours & News
6th Sep 2008, 18:02
Replies: 3,239
Views: 1,137,519
Posted By ChristiaanJ

Green-dot (post #1805), Many thanks for taking...

Green-dot (post #1805),
Many thanks for taking the AAIB report apart more carefully than I did.

However, how effective is sumping? The report quotes no figures, just the conclusion from the...
Forum: Rumours & News
5th Sep 2008, 20:36
Replies: 3,239
Views: 1,137,519
Posted By ChristiaanJ

I have read the latest AAIB report. Water...

I have read the latest AAIB report.

Water content of the fuel seems to have been established from fuel samples after the crash.

According to the AAIB and other reports, most of the remaining...
Forum: Rumours & News
10th Aug 2008, 22:40
Replies: 3,239
Views: 1,137,519
Posted By ChristiaanJ

Not totally relevant to the cause of the crash,...

Not totally relevant to the cause of the crash, you'll admit.
But since we're now 83 pages into the subject... I was asking myself the same question as an A/P ancient, and maybe we can be allowed a...
Forum: Rumours & News
9th Aug 2008, 19:32
Replies: 3,239
Views: 1,137,519
Posted By ChristiaanJ

pacplyer, Your reply to Chris Scott makes me...

pacplyer,
Your reply to Chris Scott makes me doubt your competence, if not your actual provenance and education....

Where I come from (admittedly some time ago), channel A and channel B software...
Forum: Rumours & News
8th Jul 2008, 20:37
Replies: 3,239
Views: 1,137,519
Posted By ChristiaanJ

Joetom, Again confusing A/P and A/T.

Joetom,
Again confusing A/P and A/T.
Forum: Rumours & News
8th Jul 2008, 16:13
Replies: 3,239
Views: 1,137,519
Posted By ChristiaanJ

Unless autopilot design has fundamentally changed...

Unless autopilot design has fundamentally changed since my days, the (pitch) autopilot would have no way to 'sense' an uncommanded power loss.
It did its job, i.e., keeping the aircraft on the 3...
Forum: Rumours & News
4th Jul 2008, 21:27
Replies: 3,239
Views: 1,137,519
Posted By ChristiaanJ

"I 'knew' that water unfroze at 4C from childhood...

"I 'knew' that water unfroze at 4C from childhood (ponds/fish/winter)."
What's this fixation with +4°C?
I thought water was this weird stuff that reached max density at +4°C but froze at 0°C?
So,...
Forum: Rumours & News
3rd Jul 2008, 20:17
Replies: 3,239
Views: 1,137,519
Posted By ChristiaanJ

arcniz already has mostly answered this... ...

arcniz already has mostly answered this...

bigots? Haven't really seen any here. Some far-fetched suggestions, yes, but that's what R&N is all about.

contaminated ... fuel? It already seems to...
Forum: Rumours & News
3rd Jul 2008, 14:43
Replies: 3,239
Views: 1,137,519
Posted By ChristiaanJ

In category 1) I would think you'll find engines...

In category 1) I would think you'll find engines such as helicopter turbines, some turbo-props, and some ancient engines with centrifugal compressors.
Not sure about category 2)
Forum: Rumours & News
19th Jun 2008, 22:11
Replies: 3,239
Views: 1,137,519
Posted By ChristiaanJ

Point taken. However, being jumped on by the...

Point taken.
However, being jumped on by the bean counters because it broke at 152% is not ideal, either....
Should probably be discussed somewhere else, because it's an interesting notion.
Forum: Rumours & News
19th Jun 2008, 20:42
Replies: 3,239
Views: 1,137,519
Posted By ChristiaanJ

The loud laughter and hilarious applause...

The loud laughter and hilarious applause following this "revelation" have been edited from the tape in question.
Forum: Rumours & News
19th Jun 2008, 20:02
Replies: 3,239
Views: 1,137,519
Posted By ChristiaanJ

Re-Heat, You may have a point..... ...

Re-Heat,
You may have a point.....

Remember the static test on the A380 wing that broke at something like 148% of design load, rather than 150%?

Maybe, sometimes you would like to have that...
Forum: Rumours & News
16th Jun 2008, 20:17
Replies: 3,239
Views: 1,137,519
Posted By ChristiaanJ

Point taken. Although... I remember the...

Point taken.

Although... I remember the F-14A prototype went down due to a similar (hydraulic system) failure on its second flight, not after x million flights/landings.

I'm still baffled by...
Forum: Rumours & News
16th Jun 2008, 13:28
Replies: 3,239
Views: 1,137,519
Posted By ChristiaanJ

Thanks! Half a litre per second is as good a...

Thanks!
Half a litre per second is as good a ballpark figure as any.
Now what's the diameter of the fuel feed pipe?
Forum: Rumours & News
15th Jun 2008, 17:13
Replies: 3,239
Views: 1,137,519
Posted By ChristiaanJ

airfoilmod, Phenomenon also known as "water...

airfoilmod,
Phenomenon also known as "water hammer" to your local plumber.
Known to every fuel and hydraulic system engineer.
As an explanation for what happened on BA038 it seems somewhat...
Forum: Rumours & News
15th Jun 2008, 16:34
Replies: 3,239
Views: 1,137,519
Posted By ChristiaanJ

Flight Safety, Without any more AAIB input...

Flight Safety,
Without any more AAIB input we're back to guessing games....
But your post makes for an interesting question.

What was the fuel flow in m/sec or ft/sec ?
In other words, if it...
Forum: Rumours & News
29th May 2008, 20:13
Replies: 3,239
Views: 1,137,519
Posted By ChristiaanJ

I would say so. It's a magazine article,...

I would say so. It's a magazine article, remember, not an AAIB report.
This is mentioned early in the article.
It's "a prime suspect", but until more testing is done, it cannot be listed as the...
Forum: Rumours & News
24th May 2008, 17:13
Replies: 3,239
Views: 1,137,519
Posted By ChristiaanJ

777fly, I agree that we hope the AAIB will...

777fly,
I agree that we hope the AAIB will manage to get all the pieces of the puzzle in place.

I doubt there will be one single clear-cut cause, or it would have happened far earlier in the life...
Forum: Rumours & News
23rd May 2008, 22:00
Replies: 3,239
Views: 1,137,519
Posted By ChristiaanJ

"...Detailed examination of the fuel system and...

"...Detailed examination of the fuel system and pipe work has found no unusual deterioration or physical blockages."
IIRC there was a mention at one point of 'cavitation-type' damage to at least one...
Showing results 1 to 27 of 27


 
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