[PSUBS-MAILIST] glueing aluminum

[Alec Smyth via Personal_Submersibles]

Did you mean to say "ballast tank?" Working on it! Just this evening I
finished making a set of five "mushroom" valves - four for the boat and one
spare. I've been testing them by installing them in the bottom of a bucket
and using them to dump the water. Monday I'll take them to be anodized, and
when I get them back will take photos and post something on the projects
page. They're a Hugh Fulton design and I have to say I'm impressed, he did
an absolutely amazing job. The root of Shackleton's problems was water
blocking in the MBT vent lines, which turns out to be a hard problem to
solve with the raft configuration MBTs because the lines have a lot of
horizontal ground to cover. Since mushroom valves use no vent line, there
can't be water blocking and I'm hoping they're the solution. Next up, I'm
going to go into calculations and design mode and make new MBTs that
leverage these valves. It'll be interesting diving with these, the sub
should submerge in seconds. It's four valves that are three inches in
diameter each.

Best,
Alec

On Fri, Dec 22, 2017 at 7:35 PM, hank pronk via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> Alec,
> My research so far shows that aerospace parts are glued also.  I am sure
> the Lotus folks are pretty closed lipped about how they do it.  I will do
> some testing, just checking with the group to save some time and headache.
> What are you using for a ballast an now?  or is it a surprise.
> Hank
>
> On Friday, December 22, 2017, 5:29:20 PM MST, Alec Smyth via
> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
>
> Lotus Cars famously have done that, introducing bonded aluminum chassis
> with the Elise and continuing it on subsequent models. The reason is that
> welding weakens the material, so if it were welded they would need to
> increase the amount of material and it would eat up the weight savings.
> Problem is, I don't know the specifics of the glue they use nor the
> process.
>
> Best,
> Alec
>
> On Fri, Dec 22, 2017 at 6:57 PM, hank pronk via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
> Hi All,
> I have an idea that requires glueing aluminum plates together.  Has anyone
> tried this?  any success?
> Hank
>
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