RE: [PSUBS-MAILIST] riding the bubble

["Brian Cox" <ojaivalleybeefarm@dslextreme.com>]

I'm thinking maybe I should just leave it the way it is and just let there
be some air in those spaces.

Brian

-----Original Message-----
From: owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org]On Behalf Of Sean T.
Stevenson
Sent: Saturday, February 14, 2009 7:51 AM
To: personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST] riding the bubble


As an alternative to putting holes in the webs, you could use some sort
of filler (syntactic foam?) to create a rounded or otherwise sculpted
upper surface which would not serve as an air trap.

-Sean


Brian Cox wrote:
>    In my incredibly large ballast / support structure,  the inside is made
> up of ribs which are a part of the ferro-cement form and which give the
> thing more over-all strenght.  I've been fretting about this aspect of the
> internal shape of this area because at the top the ribs are a place where
> pockets of air can't freely slide out to where the vent valves will be (
> I'll have a vent on each side) .  So to eleviate this problem I was going
to
> put small 1" holes at the top of each rib ( you can see the plugs at the
top
> of the ribs in the photo).  But now, in lew of the dissusion on the bubble
> riding factor, I'm thinking that that may not be nessesary.  For one thing
I
> don't like the idea of a hole right there because it will weaken the rib
at
> that point, though I think there is enough steel to handle a hole at that
> point.
>
>
> http://www.frappr.com/?a=viewphoto&id=759383&pid=10308219
>
>
> Brian
>




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