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Re: [PSUBS-MAILIST] Quick Casting question

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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