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RE: [PSUBS-MAILIST] Introduction
Hi Marc, You're right about the free-flooding and the no pressure
differential.
I think that if one were to make a pressure hull out of concrete you would
want to do what Ian is doing, and that is make a very thick walled vessel.
This would be in the realm of re-enforced concrete which would be 10 to 12
inches thick. Ferro-cement would not be a very good material for resisting
pressure. Steel is better, steel has many advantages. When you start to go
with very thick concrete the cost is going to exceed what you could do in
steel, or at least equal it.
That being said, you may be able to build a ferro cement sub that was
constructed in such a way that it would have many re-enforcing ribs on the
inside to increase the strength, but it would reduce your inside space
considerably. It would not be able to go very deep, maybe only 30'. You
would need to test some hulls to destruction to really know how much they
could take.
Brian
-----Original Message-----
From: owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org]On Behalf Of F. Marc de
Piolenc
Sent: Tuesday, November 03, 2009 4:50 PM
To: personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST] Introduction
Thanks for the link. I take it, then, that your FC component is all
free-flooding when submerged - no differential pressure? May I ask why
steel for the pressure hull; is it just because of the lack of Code
coverage?
Best,
Marc
Brian Cox wrote:
> Hi Marc de Piolenc,
> That would be me, however the part of my sub that is
> ferro-cement is only a ballast / superstructure. My pressure hull will be
> steel much like many of the other members. Here is a link to the psubs
site
> and what I have done so far.
>
> http://www.psubs.org/projects/1234567812/ferrosuperstructure/
>
> Brian
>
> -----Original Message-----
> From: owner-personal_submersibles@psubs.org
> [mailto:owner-personal_submersibles@psubs.org]On Behalf Of F. Marc de
> Piolenc
> Sent: Monday, November 02, 2009 2:31 PM
> To: personal_submersibles@psubs.org
> Subject: [PSUBS-MAILIST] Introduction
>
>
> New member here.
>
> American/French dual national, mechanical engineer by training
> (aeronautical by predilection), interested since childhood in submarines.
>
> I've wanted to build a ferrocement sub since I first learned of the
> material in my late teens (mid-fifties now). I understand there is
> another list member who is actually building in ferrocement.
>
> Best to all,
>
> Marc de Piolenc
> Iligan City, Philippines
> http://www.archivale.com
>
>
>
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The personal submersibles mailing list complies with the US Federal
CAN-SPAM Act of 2003. Your email address appears in our database
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Removal of your email address from this mailing list occurs by an
automated process and should be complete within five minutes of
our server receiving your request.
PSUBS.ORG
PO Box 53
Weare, NH 03281
603-529-1100
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The personal submersibles mailing list complies with the US Federal
CAN-SPAM Act of 2003. Your email address appears in our database
because either you, or someone you know, requested you receive messages
from our organization.
If you want to be removed from this mailing list simply click on the
link below or send a blank email message to:
removeme-personal_submersibles@psubs.org
Removal of your email address from this mailing list occurs by an
automated process and should be complete within five minutes of
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PSUBS.ORG
PO Box 53
Weare, NH 03281
603-529-1100
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