Which of the following is correct in terms of the wing layout with twist?(a) Incidence at each span station must be considered and chord should be rotated accordingly(b) Only untwist airfoils can be used for layout(c) Only rotation of chord line is required at c/6 points(d) Only chord line should be rotated by reducing length of chordThis question was addressed to me in examination.The above asked question is from Configuration Layout topic in chapter Configuration Layout and Loft of Aircraft Design

Which of the following is correct in terms of the wing layout with twi

1.	Which of the following is correct in terms of the wing layout with twist?(a) Incidence at each span station must be considered and chord should be rotated accordingly(b) Only untwist airfoils can be used for layout(c) Only rotation of chord line is required at c/6 points(d) Only chord line should be rotated by reducing length of chordThis question was addressed to me in examination.The above asked question is from Configuration Layout topic in chapter Configuration Layout and Loft of Aircraft Design
Answer» The correct CHOICE is (a) Incidence at each span station MUST be considered and chord should be rotated accordingly Best explanation: In general, airfoils are drawn to find the complete WING layout. When wing has some twist then, we need to find incidence at each span station in order to include EFFECTS of twist. Also chord needs to be rotated accordingly before drawing an actual airfoil for lofting.

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