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[PSUBS-MAILIST] Insulation

Paul,

You bring up a good point ...

">The waffle depressions would be where the delicious syrup - err,

condensation - would collect."
Speaking of condensation...I was looking at this material being used on the wall of the undersea hotel in Key Largo. 

http://jul.com/slideshow.html
Does anyone know what this is, ....and if it is a viable material for a psub? I know cork was used in old fleet boats but, what do we have today that is better...easier to apply, more durable and maintenance free? 

Joe


From: "Paul Kreemer" <paulkreemer@gmail.com>
Reply-To: personal_submersibles@psubs.org
To: personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST] Quick Casting question
Date: Tue, 5 Sep 2006 12:25:59 -0700

I think George is considering casting a hull or hull section that includes
framing in the casting.  All in one piece - no separate frames or
stringers.  So the interior would have some kind of pattern, maybe like a
waffle, to reduce the amount of aluminum in the casting.

The waffle depressions would be where the delicious syrup - err,
condensation - would collect.


My questions and wild speculations are:

* No difficult frame fitting and welding
* Difficult casting process?
* More efficient structurally - at least in my mind.  Is it better to run
the pattern at an angle or longitudinally and laterally aligned?  (I
remember calculating the wrap angle for a composite pressure vessel in
college but don't know about an external pressure design.)
* Would need structural design help - the crush depth spreadsheet won't do
this one



Paul


On 9/5/06, Smyth, Alec <Alec.Smyth@compuware.com> wrote:


 George,

D'you have a drawing of what you're proposing? I don't follow...

thanks,

Alec

 -----Original Message-----
*From:* owner-personal_submersibles@psubs.org [mailto:
owner-personal_submersibles@psubs.org] *On Behalf Of *George Slaterpryce
*Sent:* Tuesday, September 05, 2006 2:31 PM
*To:* PSUBS Mailing List
*Subject:* [PSUBS-MAILIST] Quick Casting question

Does anyone know if I do a waffle pattern on my Preasure Can's inner hull
if that can substitute for welded in place braces? (Aluminum casting, inner 
pattern is a wide waffle pattern)

Or should I just stick with a straight pipe and weld the braces/ribs in it
like normal?

Fiigured I'd ask before I tried this, Considering the lack of space I have
it's a production to do anything with casting. but if it'll work I'tll
probably be worth it.

Thanks.

George H. Slaterpryce III
www.captovis.com
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