[PSUBS-MAILIST] information on viewports

Sat Mar 16 18:48:58 EDT 2024

Hi Jeff and welcome to this wonderful group. Your design is neat looking
but the mention of non rounded viewports and the flat surfaces on your boat
I think are problematic. Just to maybe explain why the others are saying to
build to the rules is because a round object is much stronger than a flat
surface as the stress is equal all around. I was in the steel industry for
many years and learned how stress travels through steel and corners are
where the stress has to make a sharp turn and that is usually where metal
breaks which they call a notch effect but Sean would be the best to talk
about that. Good luck and keep us all up to date as you move along. You're
in good hands!

Rick

On Sat, Mar 16, 2024 at 11:53 AM Jefferson Tortorelli via
Personal_Submersibles <personal_submersibles at psubs.org> wrote:

> Figured I would need internal structure. Rhino is program
>
>
>
> Jefferson Tortorelli
>
> Tortorelli Creations
>
> 4910 Santa Anita Avenue
>
> El Monte, CA 91731
>
> Cell: 909-908-3795
>
> Shop: 909-370-3131
>
> Website: www.Tortorelli.com
>
> Instagram: @tortorellicreations
>
>
>
>
>
> *From:* Personal_Submersibles <personal_submersibles-bounces at psubs.org> *On
> Behalf Of *Sean T. Stevenson via Personal_Submersibles
> *Sent:* Saturday, March 16, 2024 2:44 PM
> *To:* personal_submersibles at psubs.org
> *Subject:* Re: [PSUBS-MAILIST] information on viewports
>
>
>
> Neat aesthetic, but poorly suited to resisting external pressure, unless
> what we see in that drawing is an outer fairing hull which encompasses an
> unseen inner pressure hull.
>
> What CAD package are you using?
>
> Sean
>
>
>
>
> -------- Original Message --------
> On Mar 16, 2024, 15:29, Jefferson Tortorelli via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
>
>
> This is my preliminary design. No portholes drawn in. want to have
> viewports both sides front top and bottom for a total of four viewports.
> Interior allows two seats side by side. Still a lot of thinking to do. I
> know the vessel shape is probably not ideal but I kind of based it on our
> stealth bombers because I liked the look. I am not at this time planning on
> any great depths. Plan to build with ½ “ steel plate.
>
>
>
> Jefferson Tortorelli
>
> Tortorelli Creations
>
> 4910 Santa Anita Avenue
>
> El Monte, CA 91731vessel
>
> Cell: 909-908-3795
>
> Shop: 909-370-3131
>
> Website: www.Tortorelli.com
>
> Instagram: @tortorellicreations
>
>
>
>
>
> *From:* Personal_Submersibles <personal_submersibles-bounces at psubs.org> *On
> Behalf Of *John Bussard via Personal_Submersibles
> *Sent:* Saturday, March 16, 2024 1:54 PM
> *To:* Personal Submersibles General Discussion <
> personal_submersibles at psubs.org>
> *Subject:* Re: [PSUBS-MAILIST] information on viewports
>
>
>
> +1 to Greg’s comment- The work on that website is remarkable!
>
>
>
> Welcome to the group from a fellow Californian, though I am a non-builder
> at present. 😖
>
>
>
> John
>
> Sent from my iPhone
>
>
>
> On Mar 16, 2024, at 13:51, Gregory Snyder via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
> 
>
> Wow Jeff!
>
> I just went to your website.
>
> Incredible!
>
> If your sub building is anything like your woodworking, we are all in for
> a wonderful treat!  Awesome stuff for sure!
>
> Best personal regards,
>
> Greg
>
>
>
> On Mar 16, 2024, at 2:50 PM, Jon Wallace via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
> 
>
> Just FYI, Hank abandoned the epoxy viewport project because they shattered
> without warning, as I recall.  Perhaps he can comment further as to why he
> abandoned it.  I think that you will find we urge using known accepted
> standards for fabrication for 1-ATM vessels.  As Sean has alluded to, your
> submarine can easily become your coffin and the best way to prevent that is
> to build to accepted standards.  That doesn't mean there isn't room for
> innovation, however the cost of testing to destruction innovative designs
> is a time consuming and expensive path.
>
>
>
> We aren't trying to discourage you, just setting the "safety" tone since
> we are big on that here.  You might be well served to let is look at your
> design...we can point out issues that might be concerning and why you might
> find them so.  There's plenty of room for a non-traditional vessel that
> follows accepted design practices and you might inspire someone else to use
> your design.
>
>
>
> Jon
>
>
>
>
>
> On Saturday, March 16, 2024 at 02:29:12 PM EDT, Jefferson Tortorelli via
> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
>
>
>
>
> Thank you Sean. I have spent a good part of this morning reviewing all or
> most of the posts by your members. Lots of information that is really quite
> helpful. I know that of the two types of people interested in building a
> submersible, I fit the group that loves the build and don’t think I (at
> this point) care to dive deeper than 300 feet. It is the build. I have a
> preliminary design drawing. I actually am a little embarrassed to share as
> it certainly differs from what I have seen you guys doing.
>
>
>
> I did read something this morning about Pronk making/casting epoxy
> viewports and a link to a epoxy supplier.
>
>
>
> I will continue my research which I find quite interesting!
>
>
>
> Jeff
>
>
>
> Jefferson Tortorelli
>
> Tortorelli Creations
>
> 4910 Santa Anita Avenue
>
> El Monte, CA 91731
>
> Cell: 909-908-3795
>
> Shop: 909-370-3131
>
> Website: www.Tortorelli.com
>
> Instagram: @tortorellicreations
>
>
>
>
>
> *From:* Personal_Submersibles <personal_submersibles-bounces at psubs.org> *On
> Behalf Of *Sean T. Stevenson via Personal_Submersibles
> *Sent:* Saturday, March 16, 2024 10:18 AM
> *To:* personal_submersibles at psubs.org
> *Subject:* Re: [PSUBS-MAILIST] information on viewports
>
>
>
> It appears that I misnumbered those resources, which should obviously have
> been numbered 1, 2, and 3.
>
> Sean
> -------- Original Message --------
> On Mar 16, 2024, 11:16, Sean T. Stevenson <
> sean.t.stevenson at protonmail.com> wrote:
>
>
> Hello Jeff.
>
> A few important resources for you to check out:
>
> 1) Rules for Building and Classing Underwater Vehicles, Systems, and
> Hyperbaric Facilities - American Bureau of Shipping.
>
>
> https://ww2.eagle.org/content/dam/eagle/rules-and-guides/current/special_service/7-rules-for-building-and-classing-underwater-vehicles,-systems-and-hyperbaric-facilities-2024/7-uwvs-rules-jan24.pdf
>
> 1) Handbook of acrylics for submersibles, hyperbaric chambers, and
> aquaria. - Jerry D. Stachiw
>
>
> https://www.amazon.com/Handbook-Acrylics-Submersibles-Hyperbaric-Chambers/dp/1930536151
>
> 2) Safety standard for pressure vessels for human occupancy (PVHO-1),
> published by the American Society of Mechanical Engineers (ASME)
>
>
> https://www.asme.org/codes-standards/find-codes-standards/pvho-1-safety-standard-pressure-vessels-human-occupancy/2023/drm-enabled-pdf
>
> As for manufacturers, an internet search will likely reveal a number of
> acrylic suppliers who will manufacture viewports. Purchasing will
> inevitably be more expensive than DIY, because a manufacturer can only sell
> you a PVHO-1 certified viewport for liability reasons. For a PSub, you can
> achieve the intent without the exhaustive documentation requirements of
> PVHO-1 by designing to the standard, using the correct slush cast PMMA
> material, following the appropriate annealing schedule after forming, and
> then by subsequently testing. Per the PSubs ethos, comply with the
> commercial rules as far as is possible / practicable.
>
> Sean
>
> -------- Original Message --------
> On Mar 16, 2024, 10:52, Jefferson Tortorelli via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
>
>
> Hi:
>
>
>
> I am new to this organization and am currently in the design phase of a
> two person submersible. I am looking for information on obtaining acrylic
> viewports or learning (if possible) how to fabricate my own.
>
>
>
> Thanks,
>
>
>
> Jeff
>
>
>
> Jefferson Tortorelli
>
> Tortorelli Creations
>
> 4910 Santa Anita Avenue
>
> El Monte, CA 91731
>
> Cell: 909-908-3795
>
> Shop: 909-370-3131
>
> Website: www.Tortorelli.com
>
> Instagram: @tortorellicreations
>
>
>
>
>
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>
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