[PSUBS-MAILIST] Depth rating for 3D prints

[Alan James via Personal_Submersibles]

Wow you've been busy Alec, looking good.You have a nice high conning tower. Will be no trouble getting in in rough conditions:)Alan

      From: Alec Smyth via Personal_Submersibles <personal_submersibles at psubs.org>
 To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
 Sent: Tuesday, June 14, 2016 1:01 PM
 Subject: [PSUBS-MAILIST] Depth rating for 3D prints
   
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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