Hi Brent
The frame
distance in the diver chmaber is longer as the normal frame distance
because of the huge bottom exit
and therfore
we decide to reinforce this area all around with the 8 longitudinals.
Also two of them are use as support
for the
bottom exit. two more longitudinals are reinforce the sail hatch
cylinder botom conetion to the pressure hull.
Yes the motorcycle muffer should reduce the noice of
the high pressure air. But dont work well - so we decide to replace this
unit by a self designed unit in the future.
vbr Carsten
-----Original Message-----
Date: Tue, 29 Jul 2008 01:46:14
+0200
Subject: RE: [PSUBS-MAILIST] Pressure hull framing
options.
From: Brent Hartwig <brenthartwig@hotmail.com>
To: <personal_submersibles@psubs.org>
Hello Carsten,
Thanks for those pictures and drawing.
I really wanted to see those and hope to make good use of them in future
projects. The drawing I had seen some years ago was a front cross
section view of the diver lockout, showing the 8 longitudinal support
members in it. I had taken that to mean you had planned to have those
through the entire hull. Why only put them in the diver lockout? Is it
to reinforce the H ring rolled on edge that is supporting the smaller
head leading to the control room?
I noticed there is what looks like a motorcycle muffler for
reducing the hiss of incoming high pressure air into the diver lockout.
Is that what it is, and if so does it work well for you? We need a
better muffler setup for are hyperbaric chambers. We are using the tiny
crushed brass balls type muffler. They don't work that well.
http://www.frappr.com/?a=viewphoto&id=4001713&pid=10244472
Regards,
Brent
Hartwig
> Subject: RE:
[PSUBS-MAILIST] Pressure hull framing options.
> From:
MerlinSub@t-online.de
> To: personal_submersibles@psubs.org
> Date: Wed, 23 Jul 2008 16:02:00 +0000
>
> Hi
Brent,
>
> I use H-Frames bended in both directions
and also longitudinal H-Frames.
>
>
http://www.euronaut.org/content/upload/notes/H-frames.jpg
>
http://www.euronaut.org/content/upload/notes/IMG_2289.JPG
>
http://www.euronaut.org/content/upload/notes/Pic00003.jpg
>
http://www.euronaut.org/content/upload/notes/Pic00046.jpg
>
> This Frame : (called: double T) v = weld
>
>
============hull===
> v-----v
> I
> I
>
-----
>
> is nearly perfect because it is self
supporting and need only a small all around weld to the hull.
>
And the longitudinal tensile strength goes soft into the frame..
>
>
> And this Frame :
>
>
=================hull===
> vI Iv
> I-----I
> I I
>
> is nearly perfect to integrate an internal endcap-
>
>
>
> =================hull===
> vI Iv
> I-----I
> vI Iv
> ========I
> I
> I
> I
> I
> Endcap
>
>
> No worry about double plating and corrosion.
> Only a small amout of oxygen inside the gap - eaten
> by
a very little amount of FeO2 - than corrosion stops.
>
> VBR Carsten
>
>
>
>
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