[PSUBS-MAILIST] Shackleton stability spreadsheet

[James Frankland via Personal_Submersibles]

Thanks for sharing alec.  I will check it out later.

regards
James

On 3 August 2016 at 15:41, Alec Smyth via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> Hi everyone, here's the spreadsheet I used in my convention presentation.
> Please be mindful this is highly questionable math from a thoroughly
> unqualified source. It contains design-specific formulas that will not work
> for other boats. It is, in short, completely unwarranted and your designs
> should not be based on it without considerable rework. But you might have
> some fun just noodling around. When you find errors, please do point them
> out.
>
> I recommend playing with the values on the Operational Dash sheet for a
> while first to get a feel for how this works, before trying to figure out
> the logic on the Calculations sheet. To explain some of the variables on
> the dash:
>
> Shackleton has up to four large floats arranged in a ring at the stern end
> of the hull, and you specify the number of floats with the variable "Stern
> float ring." Similarly, "Fifth stern float" is just a 1 or a 0 and refers
> to the sternmost float of all if used, and "Num forward floats" is the
> number of much smaller floats mounted on the forward half of the boat. The
> basic idea is that you weigh your passenger and pilot, and pick a
> combination of floats, weights, and weight tray position that gets you
> approximately neutral and trimmed. The boat has no VBT.
>
>
> Thanks,
>
> Alec
>
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