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Which of the following are the two types of lift independent drag?

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Which of the following are the two types of lift independent drag?

(a) surface friction drag and profile drag

(b) induced drag and profile drag

(c) surface friction drag and induced drag

(d) parasitic drag and induced drag

This question was addressed to me in a national level competition.

Origin of the question is Drag Force in division Aircraft Force Systems and the Equations of Motion of Aircraft Performance

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The correct option is (a) surface friction drag and profile drag

Explanation: Lift independent drag is divided into two types. They are the surface friction drag and the profile drag. Surface friction drag corresponds to 75% of the lift independent drag whereas the profile drag leads to 25% of the lift independent drag.

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