Hi,

something just came to my mind when I was reading the Thomas Cook balancing thread in Civil Aviation forum.

We all know, there is a MTOW which may not be exceeded. So let's pretend you know the empty weight of the aircraft (we'll use fictional figures)

Empty weight is: 100.000 lbs

Then you begin to add fuel...

Empty weight + fuel weight is: 150.000 lbs

No you add the cargo which weighs 25.000 lbs,

making a total of: 175.000 lbs.

Okay, that's perfectly understandable.

Now the part I'm interested in.....

The MTOW of our fictional aircraft is 200.000 lbs.

One thing you still have to do is get your pax onboard. Okay... How do they know about the actual T/O weight in the end? I mean you are not weight before you enter the aircraft, neither asked. How can they be sure about the actual T/O weight / about not exceeding MTOW / about the precise fuel burn determined also bei weight and about not exceeding the maximum landing weight when an emergency landing has to be carried out?

I guess they estimate on basis of some research which came up with an average value but you never now for sure, is this right?

regards,

Dennis

[Edited 2009-06-23 10:43:38]