Question

My fuselage has length of 10.12m and volume of 8m^3. Now if I want to design same fuselage but with volume of 16m^3 then, what should be the length of fuselage? Given, all others parameters are held constant.

(a) 5.06m

(b) 1012cm

(c) 1000mm

(d) 6.025m

I had been asked this question in exam.

The doubt is from Configuration Layout in division Configuration Layout and Loft of Aircraft Design

Answer 1

Right choice is (a) 5.06m

Best explanation: Given, length of old fuselage L1 = 10.12m, volume of old fuselage V1 = 8m^3.

Now, we are asked to design same fuselage which has volume of 16m^3.

Hence, new volume V2 = 16m^3.

Internal volume V is inversely proportional to length L of the fuselage.

Here, we have been asked held all other parameters constant.

Hence, L2 = (V1/V2)*L1 = (8/16)*10.12 =5.06m^3.