A bit difficult to provide an indepth review of how it can be done, using either old fashion paper drafting techniques, or computer (2D or 3D). But in this case, I made the skins from my actual 3D print, wrapping paper around it. I'm still learning 360, but I did model the 3d part in Inventor. I didn't use any unfolding tools, since I haven't taken the time to learn them yet.
In the example below, you can see the "developed shapes" in 2D (AutoCad) that make up a more simple axi-symmetric torpedo fuselage. Basically numerous trapezoidal shaped panels, with curved tops&bottoms, that individually roll into individual "truncated cones", that stack together to make a fuse. This can be figured out without a computer, with a little thought. I can break down the full details of a cone or two from my planned Republic Rainbow model, if you'd like. A rounded fuse cross section like the P-51, which is taller than it is wide, is significantly harder to do without computers, but the principles are the same.
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