"If it's composite..."
The Wellington was fabric over wood over aluminum.
Quote:
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In these aircraft, the fuselage was built up from a number of duralumin alloy channel-beams that were formed into a large framework. Wooden battens were screwed onto the metal, to which the doped linen skin of the aircraft was fixed.
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https://en.wikipedia.org/wiki/Geodetic_airframe#Aeroplanes
The [unbuilt] motor home is specified with oak struts, pine tongue and groove sheathing, insulation shaped to a compound curve —and a fabric skin, just like the Wellington.
My favorite composite material is
basalt fiber.