Question

A fuselage is designed with circular C/S only. Average projected area is 28.2m^2 then, find the wetted area of this fuselage.

(a) 88.6m^2

(b) 96 m

(c) 540cm

(d) 253m

This question was posed to me in an online quiz.

Asked question is from Configuration Layout in section Configuration Layout and Loft of Aircraft Design

Answer 1

Correct answer is (a) 88.6m^2

Easiest explanation: Given, average projected area A = 9 m^2.

Now, wetted area Aw = π*A = π*28.2 = 88.59 = 88.6m^2.