pat
Topic Author
Posts: 110
Joined: Wed Aug 16, 2000 7:26 am

Weight And Balance On Airbus

Mon Jan 20, 2003 9:26 am

Yet another topic guys,


Does Airbus have a weight and balance system incorporated in the computer(s) on board ? I mean when the pilot receives the loadsheet, does the computer re-calculate the aircraft weight and balance by any system incorporated ?

In short, does the aircraft computer crosscheck the datas entered manually by the pilots (figures coming from the loadsheet) with its own calculation ?
Can the aircraft weight its own body ???

Tks for your answers.


Pat
 
jsuen
Posts: 204
Joined: Tue Aug 14, 2001 2:36 pm

RE: Weight And Balance On Airbus

Mon Jan 20, 2003 1:57 pm

The system is called a Weight and Balance System (WBS). It was introduced as an option on the A310 and has been certified on the A300-600, A320, 330 and 342 and 343. It involves strain sensors on each of the landing gears. From what I understand, the additional maintanence offsets fuel efficiency gains. Additionally, safety is not as much of an issue because as long as the trim is set to the takeoff range, the plane will always be controllable on takeoff (although the recent NW 320 overrun shows pilot effects).

Airbus also sells a computer program for CG and Weight calculation on crew laptops.
 
Leezyjet
Posts: 3544
Joined: Sun Oct 14, 2001 7:26 am

RE: Weight And Balance On Airbus

Tue Jan 21, 2003 11:03 am

Yes it can, but as Jsuen said it's an option.

Basically the f/deck will enter some figures off the loadsheet into the FMC and crosscheck it with what the a/c thinks it should weigh, there is a margin for discrepancies of about 10% or so that is acceptable for dispatch.

 Smile
"She Rolls, 45 knots, 90, 135, nose comes up to 20 degrees, she's airborne - She flies, Concorde Flies"
 
pat
Topic Author
Posts: 110
Joined: Wed Aug 16, 2000 7:26 am

RE: Weight And Balance On Airbus

Wed Jan 22, 2003 2:23 am

All right guys, tks Jsuen & Leezyjet !

Actually can anybody tell me how big this margin is both for weight and for balance on A330 ???

5000 KG and 1% MAC ? Can this be right ?


I am awaiting your comments !!!


Pat
 
Leezyjet
Posts: 3544
Joined: Sun Oct 14, 2001 7:26 am

RE: Weight And Balance On Airbus

Wed Jan 22, 2003 9:36 am

Sorry can't help with A330, never done them. I'll try and find out what it is for A343 and 744 if you like.

 Smile
"She Rolls, 45 knots, 90, 135, nose comes up to 20 degrees, she's airborne - She flies, Concorde Flies"
 
pat
Topic Author
Posts: 110
Joined: Wed Aug 16, 2000 7:26 am

RE: Weight And Balance On Airbus

Thu Jan 23, 2003 8:57 am

Yeah could be cool if you give me an idea for the A343 for example !

tks !


Pat

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