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If I were to build a rubber powered prop job from sheet paper as opposed to stick and tissue, one thing I'd engineer in to the model is a model rocket body tube, something like a BT-20 (roughly 18mm diameter) as the fuselage core.
It is light, sturdy, and can take thrust forces.
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Screw the rivets, I'm building for atmosphere, not detail.
later, F Scott W
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