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22nd May 2015, 17:33
Replies: 337
Views: 203,477
Posted By SyEng

Wrong Tree, Barking

In common with most large aircraft, by design the A400M fuel system keeps as much fuel as far outboard as possible all the time for wing bending moment relief. As fuel is used from the feed tanks,...
22nd May 2015, 10:02
Replies: 337
Views: 203,477
Posted By SyEng

Brian, no, there is no fuel CG trimming on A400M:...

Brian, no, there is no fuel CG trimming on A400M: neither longitudinal nor lateral. Apologies if my previous post was unclear.
22nd May 2015, 09:24
Replies: 337
Views: 203,477
Posted By SyEng

Fuel Trim

Unlike some Airbus types, the A400M does not feature "fuel tank trimming". There is no trim tank in the tail. Neither is fuel pumped laterally (except, if required, under manual pilot control to...
4th May 2013, 22:31
Replies: 50
Views: 24,321
Posted By SyEng

Fullwings, No, I don't think so. The...

Fullwings,

No, I don't think so. The available evidence in post 5 and now backed up by post 44 indicates clearly that the nose gear was forced to port against the braked tug, leaving skid marks...
1st May 2013, 21:32
Replies: 50
Views: 24,321
Posted By SyEng

Theory

Based on the photo in post 5.

There appear to be 3 sets of skid marks visible in the photo:
1: opposed cresents just in front of the engine;
2: large radius arc splitting to 2 tracks in the...
23rd Feb 2008, 22:53
Replies: 3,239
Views: 994,254
Posted By SyEng

MU3001A Thanks for the info. See above, and...

MU3001A
Thanks for the info. See above, and below.

grebllaw123d
Forgive me, but I would re-write this as “If the system functioned as per design intent the CTR tank became empty of fuel…”.
...
23rd Feb 2008, 19:57
Replies: 3,239
Views: 994,254
Posted By SyEng

Thanks for that. If this is the case and the FDR...

Thanks for that. If this is the case and the FDR shows no switch selected on and no pump outlet pressure at the end of the flight, then I reckon this rules out my centre tank feed theory. Do you have...
23rd Feb 2008, 15:52
Replies: 3,239
Views: 994,254
Posted By SyEng

Re. Avrflr post 330.

Avrflr,


“Miracle” is not standard systems safety analysis terminology. Please define. Here are some of the terms we use in the industry by way of example. Personally though, I prefer to stick...
22nd Feb 2008, 18:23
Replies: 3,239
Views: 994,254
Posted By SyEng

Thanks Chris, In the "large amount of water...

Thanks Chris,

In the "large amount of water in the tank" scenario, it would still be frozen at TOD. Agree it would be interesting to hear from 777 pilots on pitch attitudes. The answers to the...
22nd Feb 2008, 18:05
Replies: 3,239
Views: 994,254
Posted By SyEng

Borgha, See Swedish Steve's post 304 above....

Borgha,

See Swedish Steve's post 304 above. I imagine the function of the wing tank float valve on the CT fuel scavenge outlet is to prevent transfer into a full tank, i.e. prevent transfer...
22nd Feb 2008, 17:12
Replies: 3,239
Views: 994,254
Posted By SyEng

The effect of CT boost pumps switching on with...

The effect of CT boost pumps switching on with inlets covered is to feed CT fuel (or water) direct to the engines. (as I understand the system... in the absence of schematics etc.)
22nd Feb 2008, 16:04
Replies: 3,239
Views: 994,254
Posted By SyEng

CT Feed Theory

We’re talking about the centre tank, not the wing tanks.


No, it would be fine.


Thanks for the pics. Got a system schematic?


No, but I can’t imagine the 777 tank environment is so...
21st Feb 2008, 23:16
Replies: 3,239
Views: 994,254
Posted By SyEng

Green-dot: okay, thanks. Not sure what the point...

Green-dot: okay, thanks. Not sure what the point of a water-detection system that only triggers at such a high volume is, though.

Airfoilmod: your physics is wrong. You seem to be muddling gas...
21st Feb 2008, 22:31
Replies: 3,239
Views: 994,254
Posted By SyEng

re. my post 216

According to the AAIB special report, the right MLG punctured the centre tank. I infer from this that the CT extends into the wings, outside of the fuselage profile. An empty tank in the wing will...
21st Feb 2008, 21:11
Replies: 3,239
Views: 994,254
Posted By SyEng

138 gallons?

Green-dot

This seems rather a lot of water. Are you sure?
20th Feb 2008, 23:23
Replies: 3,239
Views: 994,254
Posted By SyEng

Theory

I am not familiar with the 777 fuel system. If anyone is in a position to share schematics or system descriptions I would be most interested. However, with the information gleaned from this and the...
7th Sep 2007, 21:31
Replies: 2,761
Views: 602,057
Posted By SyEng

EMIT, As I've said before, my feeling (and...

EMIT,

As I've said before, my feeling (and that's not worth anything, really) is that it is more likely (but not overwhelmingly) that the TL was left in the climb detent than there was a...
7th Sep 2007, 20:37
Replies: 2,761
Views: 602,057
Posted By SyEng

Evidence...Logic...Facts...Truth

FlyingNewbie10, PBL,

I agree, but some might interpret PBL's latest as damning FN with faint praise.

Let me try to say this again in the hope of getting through to some who seem uncomfortable...
5th Sep 2007, 21:53
Replies: 2,761
Views: 602,057
Posted By SyEng

To FlyingNewbie10:

Neither do I, but it must surely form part of the official investigation. If the sound of TL retard was clear enough to transcribe by ear, then a proper audio analysis could be powerful evidence.
...
5th Sep 2007, 21:31
Replies: 2,761
Views: 602,057
Posted By SyEng

To Dani

Dani,

Ref your response 1997 to my post 1982.



Of course they would if the investigation establishes this as a causal factor.
3rd Sep 2007, 22:26
Replies: 2,761
Views: 602,057
Posted By SyEng

ChistiaanJ, How do you do that then?

ChistiaanJ,

How do you do that then?
3rd Sep 2007, 22:17
Replies: 2,761
Views: 602,057
Posted By SyEng

Here's another one... ...

Here's another one...


http://i236.photobucket.com/albums/ff269/SyEng_01/A320ATA76Mech2.jpg
3rd Sep 2007, 21:59
Replies: 2,761
Views: 602,057
Posted By SyEng

Thanks BOAC. Try this: ...

Thanks BOAC.

Try this:

http://i236.photobucket.com/albums/ff269/SyEng_01/A320ATA76Mech.jpg
3rd Sep 2007, 21:38
Replies: 2,761
Views: 602,057
Posted By SyEng

ChristiaanJ Yes I do have a picture. Anyone...

ChristiaanJ

Yes I do have a picture. Anyone know how I post a .bmp on here?
3rd Sep 2007, 21:12
Replies: 2,761
Views: 602,057
Posted By SyEng

TL Mechanism

Some posters here have jumped to the conclusion that the PF left No.2 TL in the climb detent. That may very well be the case. However, all that can be inferred from the FDR trace is that the FDR...
Showing results 1 to 25 of 34
 


 
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