Mass and balance · Question 11 of 12
Take-off mass 900 kg, moment 2 070 kgm. In flight, 50 l of AVGAS (36 kg) are used from a tank with an arm of 2.6 m. Where is the centre of gravity at landing?
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Answer
- B At about 2.29 m
Explanation
At take-off the centre of gravity is at 2 070 / 900 = 2.30 m. The fuel used has a moment of 36 × 2.6 = 93.6 kgm. At landing: (2 070 − 93.6) / (900 − 36) = 1 976.4 / 864 ≈ 2.29 m. Because the tank is behind the centre of gravity, the centre of gravity moves forward as fuel is used.