[PSUBS-MAILIST] Assistance needed, anyone please!

[Sean T. Stevenson via Personal_Submersibles]

Les, I can happily run some test cases this weekend to figure the hull material weight of your proposed sphere, but if your concern is the ultimate handling / trailering weight, as a functional submersible that is going to be exactly the weight of an equivalent sphere of seawater, at ~ 1,025 kg/m^3. For your 2m sphere, that will be 4,293.5 kg or 9,465.5 lbs.

Sean

On Wednesday, October 22nd, 2025 at 19:00, via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

> After many years and many hospital holidays, 🙂 I am no longer a financial member.
>
> However, I am hoping that someone may assist me in the spirit of Psubs.
>
> If memory serves, there was a calc formula on your site of which I no longer have access .
>
> Any way, I have a project idea that to continue with, relies on the minimum weight achievable for the following ;
>
> A 2 meter diameter sphere with appropriate bracing material and with safety margins
>
> To dive to sea-water safe depth of 150meter (160psi) No doors No windows
>
> Windows and doors will add much I know, however, are details to be considered later only if the basic weight indication makes the project viable.
>
> So basically, I need to know the framing and sheeting steel sizes and thicknesses to calculate the overall weight in this basic form. If positive at such point I will apply for re- membership to follow through with my idea.
>
> I know this sounds vague and I am asking much, but could someone assist me in this very basic task, which I know not how to do.
>
> Thanking any member who might be inclined to assist me.
>
> Cheers Les
>
> Safe diving 🙂
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