[PSUBS-MAILIST] Shackleton update

[Douglas Suhr via Personal_Submersibles]

Of course I was* not* at the convention, but I too am interested(!), thanks
for posting an update Alec. Out of curiosity, when you are standing on one
side (or the other) of the deck, does the listing get your feet wet? ~ Doug


On Tue, Aug 9, 2016 at 10:26 PM, Alec Smyth via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> Hi everyone,
>
> Here's an update for those who were at the convention discussion of
> Shackleton's stability. We did a second test yesterday, adding ballast per
> the calculations to bring the center of gravity below the center of
> buoyancy when surfaced. After that we also tried Hank's suggestion of
> drilling holes in the lower part of the MBTs to gain some stability that
> way too, and that also helped. Both things worked as expected and the sub
> now has some stability. However, I also wanted to see how it actually felt
> in the water walking around on the deck, and I wasn't happy with that. I'm
> evaluating modifications, and my current thought is to replace the MBTs
> with a "raft" configuration, raising the tanks' CB and considerably
> increasing the beam. That would have the benefit of massively increasing
> stability while keeping the high coning tower and its associated freeboard,
> a key design objective. I'm researching mineral tanks and similar
> off-the-shelf options.
>
>
> Best,
>
> Alec
>
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