747 Stab Tank
Thread Starter
Joined: Jun 2001
Posts: 81
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From: Peripatetic
747 Stab Tank
What is the point of the stab tank on the 747. Apparently it is emptied first so it's not for C of G control. Is bi directional fuel control possible. Is the C of G on a 747 fore or aft normaly? Could the stab tank be just another place to stuff fuel?
So many questions, so little time.......
So many questions, so little time.......
Joined: Apr 2005
Posts: 260
Likes: 0
From: uk
The point is carriage of an extra 10 tonnes of fuel - the pumps are commanded on with an eicas message when the centre tank reaches 36,500 kgs. Bi -directional flow not possible. Extra fuel wherever you 'stuff it' is extra range! Good luck with the interview!!
Joined: Feb 2000
Posts: 1,995
Likes: 512
From: UK
In this area, failure of the Stab tank pumps used to put you neatly between a rock and a hard place!!
Boeing subsequently produced much less restrictive main tank quantities for the follow-up drill but it is still an interesting management problem.
It has happened, by the way, (Birdseed out of HK, for one) and it would be illuminating to read the incident report.
Boeing subsequently produced much less restrictive main tank quantities for the follow-up drill but it is still an interesting management problem. It has happened, by the way, (Birdseed out of HK, for one) and it would be illuminating to read the incident report.
