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To get initial estimation of the parasite drag, aircraft wetted area can be multiplied by _____(a) equivalent skin friction coefficient(b) weight(c) lift(d) wing spanThe question was posed to me in class test.Question is taken from Aerodynamics in division Aerodynamics of Aircraft Design

Answer»

The correct choice is (a) equivalent SKIN friction coefficient

Best EXPLANATION: Initial ESTIMATION of parasite drag can be obtained by multiplying equivalent skin friction coefficient with wetted area of aircraft. Lift and WEIGHT will be in opposite direction to each other. WING span is a typically length of the aircraft.



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