A330 trim: '35 minus actual C.G. divided by 2'?
Hello all,
A Captain colleague of mine and I have been discussing where this formula comes from, does anyone know?
We can't seem to find it in any Airbus related document(s).
At our airline (an Asian Carrier flying the A330-200) most crews take the actual trim value and take that value away from 35. They then divide the resulting number by 2 to obtain the Take off trim setting.
For example;
Take off CG = 30.
35-30 = 5.
5 divided by 2= 2.5 (UP).
So I'm just curious as to where this comes from. Could anyone perhaps provide a reference?