[PSUBS-MAILIST] glueing aluminum

[Alan via Personal_Submersibles]

Alec,
I am interested in the photos when you take them.
I have a valve design based on Vance's but operated with solenoids.
However am open to alternatives.
What sort of anodising? I had my lights marine anodised but will go to
hard anodising next as they can scratch relatively easy. Could however
be the anodiser, I am not experienced enough to know!
Alan

Sent from my iPad

> On 23/12/2017, at 3:27 PM, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> Wow!!! that will go down like a rock, what drives them? 
> Hank
> 
> On Friday, December 22, 2017, 6:36:20 PM MST, Alec Smyth via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> 
> 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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