And then the restrictions on T/O and descent wouldn't be as much as 2300 kgs and 1400 kgs respectively I'd guess..
Why not? You have a significantly higher and lower pitch respectively than on the ground.
I can see what you're saying there cosmo but then wouldn't it be a massive fluke that they just happen to run dry at 453 kg which is pretty much 1000lbs? Why wasn't it 353kg or 553kg?
Who is to say that it's not 447 or 436?
Maybe Boeing chose 453 because it's above the limit where they run dry and a nice round number in lbs...
