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The drag coefficient of a complete structure such as an aircraft includes________

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in Fluid Mechanics by (118k points)
The drag coefficient of a complete structure such as an aircraft includes________

(a) Form drag

(b) Pressure drag

(c) Interference drag

(d) Induced drag

This question was addressed to me in an internship interview.

This intriguing question comes from Drag on a Sphere in chapter Boundary Layer Flow & Forces on Sub-merged Bodies of Fluid Mechanics

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Best answer
Correct choice is (c) Interference drag

Easiest explanation: The drag coefficient of a complete structure such as an aircraft includes interference drag. It results when an airflow around one part of an object. The two airflows must speed up in order to pass through the restricted area.

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