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Determine the corrections or otherwise of the following assertion and reason : Assertion : To generate new airfoil, we use spanwise line instead of chord line in flat wrap interpolation technique. Reason: Chordwise line will generate flat structure from curves having different values of tangent angle. and are true and is the correct reason for b) Both and are true but is not the correct reason for c) Both and are false d) is true but is false

Determine the corrections or otherwise of the following assertion and reason : Assertion : To generate new airfoil, we use spanwise line instead of chord line in flat wrap interpolation technique. Reason: Chordwise line will generate flat structure from curves having different values of tangent angle. and are true and is the correct reason for b) Both and are true but is not the correct reason for c) Both and are false d) is true but is false Correct Answer A

In order to provide flat wrapping to wing, it is required to interpolate between airfoil coordinates with same tangent angle or slope. Chordwise lines are affected by wing twist. So, it will not generate flat structure from curves with different tangent angles. Hence, a spanwise line is used for flat wrap interpolation.

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