[PSUBS-MAILIST] Katy's new sub

[Alec Smyth via Personal_Submersibles]

Scott, I investigated building with HY-80 many years ago. I found that all
you could readily get was plate. If I wanted something as simple as a pipe,
I could not get it in HY-80. Nobody carried stock of anything in HY-80 so
every last hull component would have become a custom job and driven up the
cost tremendously.  A similar thing happened to me when I went looking for
a 31" hemispherical endcap. It turned out 31" was a non-standard diameter
for hemisphericals, but stock (if rare) for ellipticals, so the response I
got was this... "If you want a 31" elliptical that's $300, but if you want
it hemispherical that costs the same $300 plus $4000 in setup time". It
gives you some idea how much less expensive it is if you manage to stay
within the boundaries of things considered "standard". I hate to burst your
HY-80 bubble, but that at any rate was the situation at the time.

I have an ancient book from the boilermaking trade, that lists all the
standard sizes for things like pipe and heads along with their properties.
Its called the "Pressure Vessel Handbook" and is really useful for finding
out what's "standard".


Best,

Alec


On Fri, Jun 13, 2014 at 11:04 PM, swaters via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> The K-250 is for my wife to build. She wanted something that wasn't really
> hard to build. I am wanting to build a sub that dives to 3,300' and holds 3
> people with an large veiwport and manipulator. Problem I am currently
> having is locating HY-80 steel.
> Thanks,
> Scott Waters
>
>
>
>
> Sent from my U.S. Cellular© Smartphone
>
> hank pronk via Personal_Submersibles <personal_submersibles at psubs.org>
> wrote:
> Scott,
> Just a thought, instead of buying an old k250 and salvaging some parts.
> Consider talking to Steve, and buy his Perry 1401 front end and have a hull
> rolled to fit, 43in, you could put a real nice sub together working around
> the Perry front end.
> Hank
>
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