[PSUBS-MAILIST] information on viewports

[Sean T. Stevenson via Personal_Submersibles]

I would strongly advise you to use a viewport design which is consistent with approved geometries. Standards don't arrive by chance. They are informed by engineering experience, and by the study of past accidents.

Remember, it is just as easy to drown in 6 feet of water as it is to drown in 6000. A vehicle designed for shallow operating depths can generally have a thinner pressure boundary than a vehicle designed for deeper depths, but that is about the only substantive difference. Shallow doesn't mean you can cut corners.

Sean

-------- Original Message --------
On Mar 16, 2024, 12:25, Jefferson Tortorelli via Personal_Submersibles 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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