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Following graph represents ____

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in Aircraft Design by (701k points)
Following graph represents ____

(a) graphical method to find MAC

(b) graphical method to produce drag

(c) graphical method to find lift

(d) graphical method to find lift-curve

This question was addressed to me in exam.

Question is taken from Configuration Layout topic in section Configuration Layout and Loft of Aircraft Design

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Right answer is (a) graphical method to find MAC

To explain: Above figure is showing the typical graphical method to find the MAC. Here, first we project the root chord from tip chord and vice-versa as shown by dashed lines from respective chords. After that we draw a line from which will connect midpoints of root and tip chord. Intersection of both lines will provide MAC which will be located at Y distance from root chord as shown.

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