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To reduce fuselage wetted area we can ___________

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in Aircraft Design by (701k points)
To reduce fuselage wetted area we can ___________

(a) lower the fineness ratio

(b) increase fineness ratio

(c) always double the fineness ratio

(d) always use long fuselage

I have been asked this question during an interview.

This intriguing question comes from Configuration Layout topic in chapter Configuration Layout Considerations of Aircraft Design

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The correct option is (a) lower the fineness ratio

Easiest explanation: Wetted area can be used to determine the drag properties of an aircraft. Fineness ratio is nothing but the length of the fuselage divided by max diameter of the fuselage. Hence, if we lower the fineness ratio then the ratio of length to diameter will reduce which in turn reduces the wetted area.

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