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Forum: Rumours & News

19th Jun 2008, 21:36

Replies: 3,239

BA038 (B777) Thread

Views: 1,137,490

Posted By johngreen

pls8xx Keep up! Just to clarify the 777 fuel...

pls8xx

Keep up! Just to clarify the 777 fuel system, there are two booster pumps each with a non return valve located at the rear of each left and right wing tank. Each pair of pumps delivers fuel...

Forum: Rumours & News

18th Jun 2008, 20:29

Replies: 3,239

BA038 (B777) Thread

Views: 1,137,490

Posted By johngreen

Lomapaseo The circumstance described is...

Lomapaseo

The circumstance described is most certainly unusual but I can assure you regardless of friction losses, there are occasions when very different systems in different conditions and with...

Forum: Rumours & News

18th Jun 2008, 16:34

Replies: 3,239

BA038 (B777) Thread

Views: 1,137,490

Posted By johngreen

Resonance expalined - in part!

From the information supplied from this forum and some additional research, I understand the relevant components of the 777 fuel system to be; two AC powered centrifugal booster pumps mounted...

Forum: Rumours & News

16th Jun 2008, 19:29

Replies: 3,239

BA038 (B777) Thread

Views: 1,137,490

Posted By johngreen

A little more on resonance

ChristiaanJ
As the troublemaker who suggested resonance a few pages back I would have to agree with you that ‘As an explanation ...it seems somewhat far fetched’. However it seems whatever is...

Forum: Rumours & News

18th May 2008, 07:56

Replies: 3,239

BA038 (B777) Thread

Views: 1,137,490

Posted By johngreen

Low Pressure Pumps

Barit1

The low pressure pumps are something very much like this....

http://www.eatonaerospaceltd.com/fuel/Resources/031_2_Type9602boostpump777_300.pdf...

Forum: Rumours & News

16th May 2008, 14:19

Replies: 3,239

BA038 (B777) Thread

Views: 1,137,490

Posted By johngreen

In my own realm of fluid dynamics I have...

In my own realm of fluid dynamics I have witnessed some few examples over many years of systems entering states of very unintended and undesired resonance created by the combination of a free moving...

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