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What will be the total fuel weight fraction for x-number of mission phases?(a) Wf / W0 = 1 – (Wx / W0)(b) Wf / W0 = 1 + (Wx / W0)(c) Wf / W0 = 1 / (Wx / W0)(d) Wf / W0 = 1 + (Wx / W0)The question was posed to me in semester exam.My enquiry is from Conceptual Sketch Sizing in portion Conceptual Sketch Sizing of Aircraft Design

Answer»

Right option is (a) WF / W0 = 1 – (Wx / W0)

Best explanation: The fuel-fraction method is USED to determine total fuel weight fraction.

According to which if there are x – number of mission PHASES in mission profile then the total fuel weight fraction is given by,

Wf / W0 = 1 – (Wx / W0)

Since, RESERVED fuel is not mentioned we can neglect it.



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