Refer to figure.
From the data given at the appendix and assuming a fuel index shift of – 5.7 from the ZFM loaded index, determine which of the following is the correct value (percentage MAC) for the position of the centre of gravity at Take Off Mass.
Refer to figure.
First we identify takeoff mass:
Takeoff mass = DOM + takeoff fuel + traffic load = 59 800 kg
We make a line representing TOM
We go left in the fuel index a value of (-5.7)
We go down till intercepting takeoff mass line we draw before.
CG at takeoff = 18% (approx. 18.3%)
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