Discussion
An aircraft has an operating empty weight of \( 48 \) t and a payload of \( 22 \) t. Its zero fuel weight is
Answer: B
Correct answer: 70 t
Zero fuel weight is everything the aircraft carries except usable fuel: \[ \mathrm{ZFW} = \mathrm{OEW} + \text{payload} = 48 + 22 = 70\ \text{t.} \] The limit on it exists because payload sits in the fuselage and adds to wing root bending, whereas fuel sits in the wing and relieves it - so the structure is sized on the case with the most payload and the least fuel.
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