[PSUBS-MAILIST] Depth rating for 3D prints

[Alec Smyth via Personal_Submersibles]

Hi all,

I'm going to test using 3D printed Kort nozzles on Shackleton, and I have
an interesting unknown. It would be nice to print them solid, but it would
just take too long and probably create shrinkage issues. So the question
is, what fill percent suffices (in 3D printing you get to specify the
percentage of material fill, the rest being air). I called Greg Cottrell
and he didn't have any data on prints, but he did have some on the depth
rating of different types of buoyancy foam.I did a napkin calculation and
it would appear that, at least if the print behaves like foam of similar
density, I'm fine. But does anyone have any data on this? Or does anyone
have a small pressure test chamber for which we might print some test
samples? I would need to test to about 500 psi.

BTW I've updated Shackleton's project page:
http://www.psubs.org/projects/1234567810/shackleton/



Thanks,

Alec
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