Board Thread:General Nerf discussion/@comment-30049823-20190708030947/@comment-30049823-20190710071425

Elliottw wrote: They'd be two or three times as heavy/dense as Nerf polyurethane missiles, You don't need to 3D print everything solid, though; most patterns use a lattice or honeycomb internally to save on material. It'd be mostly air, except for the nosecone, which you WANT denser.

The memory-foam stuff requires that you wash away the water-soluble bits, which would be problematic for a design with internal air pockets... So I suspect you'd end up with something that was just a thin sealed inner sleeve, and a dense heavy nosecone, and the "body" made entirely of long "fins" that were open for the entire length behind the nosecone. It'd be squishy, but still pretty lightweight and aerodynamic.

But I'm gonna look for some foam tubing like you suggested earlier, next time I'm at a Home Depot. I'm also thinking about leaving the pool noodle un-split and "lining" the interior with some tubing that fits between the noodle and the launcher shaft... or fabricating my own liner by rolling up craft foam into a tube shape, if I have to.