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An airliner with take-off gross weight of 2100kg is cruising with fuel weight fraction of 0.280. Then, what will be the weight of fuel (Wf)?(a) 588kg(b) 588lb(c) 90kg(d) 28lbI got this question during an interview for a job.The doubt is from Conceptual Sketch Sizing in portion Conceptual Sketch Sizing of Aircraft Design

Answer»

Correct answer is (a) 588KG

To explain I would say: Given,

AIRCRAFT take-off gross WEIGHT W0 = 2100kg,

Fuel weight fraction = Wf/W0 = 0.28

Hence, fuel weight Wf = (Wf/W0) * W0 = 0.28*2100 = 588kg.



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