Re: [PSUBS-MAILIST] Presure Vessel, Rolled vs. Spun/Stamped

[Al Secor <wreckdiver@usadatanet.net>]

You might want to check with Karl Stanley...I believe he used sphere's for
his Idabel.

Al Secor  ARS: WA3PWX  Scuba Instructor SSI PDIC TDI
http://www.geocities.com/SubDiverI
----- Original Message ----- 
From: <indyair@iquest.net>
To: <personal_submersibles@psubs.org>
Sent: Wednesday, April 13, 2005 8:54 AM
Subject: [PSUBS-MAILIST] Presure Vessel, Rolled vs. Spun/Stamped


All,
An early concept pressure vessel/psub design I am working on involves 2
joined
spheres.  I have read that spheres need to be stamped or spun where as
cylinders can be rolled.  I get the feeling that having sphere shapes
produced
is more costly than cylinders.  I am trying to get a feel for how much more
expensive.  Has anyone gone through this exercise or made a similar decision
of
sphere vs. cylinder from a production cost perspective?
Thanks,
Steve McQueen






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