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Search: Posts Made By: SyEng
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Forum: Rumours & News
23rd Feb 2008, 22:53
Replies: 3,239
Views: 1,137,475
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…”.
...
Forum: Rumours & News
23rd Feb 2008, 19:57
Replies: 3,239
Views: 1,137,475
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...
Forum: Rumours & News
23rd Feb 2008, 15:52
Replies: 3,239
Views: 1,137,475
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...
Forum: Rumours & News
22nd Feb 2008, 18:23
Replies: 3,239
Views: 1,137,475
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...
Forum: Rumours & News
22nd Feb 2008, 18:05
Replies: 3,239
Views: 1,137,475
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...
Forum: Rumours & News
22nd Feb 2008, 17:12
Replies: 3,239
Views: 1,137,475
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.)
Forum: Rumours & News
22nd Feb 2008, 16:04
Replies: 3,239
Views: 1,137,475
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...
Forum: Rumours & News
21st Feb 2008, 23:16
Replies: 3,239
Views: 1,137,475
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...
Forum: Rumours & News
21st Feb 2008, 22:31
Replies: 3,239
Views: 1,137,475
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...
Forum: Rumours & News
21st Feb 2008, 21:11
Replies: 3,239
Views: 1,137,475
Posted By SyEng

138 gallons?

Green-dot

This seems rather a lot of water. Are you sure?
Forum: Rumours & News
20th Feb 2008, 23:23
Replies: 3,239
Views: 1,137,475
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...
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