I'm practicing for my EASA PPL(A) exam and one of the questions I came across sound like this:
Calculated take-off mass = 1082 kg, calculated CG = 0.254 m, fuel burn = 55 l on station 0.40 m.
A. 24.6
B. 25.2
C. 25.4
D. 24.8 <- this is the correct answer
My question is how do I actually get to this answer?
This is what I tried:
- 14,6 cm would be the difference between the fuel burn station and calculated CoG (in cm)
- 1027 kg would be the difference between calculated T/O mass and fuel burned
- 803 cm/kg would be the removed mass
- 0,78 cm would be the CoG shift calculated
- New CoG should be 25,4 (old CoG) - 0,78 which would mean 24,6
But yeah... that is not correct. So what am I missing here?