[PSUBS-MAILIST] Depth rating for 3D prints

[Alec Smyth via Personal_Submersibles]

Thanks Hank, I think the small one would work fine. I suppose we should
just print wafers that would fit the small one, with different fill
percentages, and see if they crack.

On Tue, Jun 14, 2016 at 7:02 AM, hank pronk via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> Alec,
> It is clear you had a poor experience with a low CT and have ensured it
> will never happen again ;-)  very nice work.  It is a triumph to build such
> a sub in a confined space.
> I have a couple of options for pressure testing.  the quickest for testing
> small samples is my tiny chamber.  That one 1.5 in ID by 4 in long,   If
> you need bigger I have 3.5 in ID by 24 Long.    If you need bigger, I can
> put something together.
> As I mentioned, I can weigh and measure the part before and after, also I
> can measure in time increments.  Just make a test procedure for me.
> Hank
>
>
>
> On Monday, June 13, 2016 8:27 PM, hank pronk via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
>
> Alec,
> You can send me small samples for pressure testing to 3,000 psi.  I can
> weigh the part before and after.
>
> Hank
>
>
> On Monday, June 13, 2016 7:01 PM, Alec Smyth via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
>
> 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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