Re: [PSUBS-MAILIST] kooky transparent conning idea

["Rick and Marcia" <empiricus@telus.net>]

Kooky - hmmmm.  I see nothing kooky, just great, creative thinking!

I've considered using acrylic sheet to build a sub.  I think I'll build a
prototype from wood and epoxy first - a lot cheaper.  ;-)

Rick




----- Original Message -----
From: "William Alford" <walford@dbtech.net>
To: <personal_submersibles@psubs.org>
Sent: Friday, December 10, 2004 9:39 PM
Subject: [PSUBS-MAILIST] kooky transparent conning idea


> After seeing a transparent hyperbaric chamber, I couldn't help but
daydream of
> a completely 360 degree transparent conning tower. Hospitals that have
these
> entirely transparent HBOT chambers are required to replace them every 10K
hours
> or 10 years at a cost of around 10 grand. I wonder if one could get the
old
> tube from them for cheap. Of course, the cycles/fatigue that makes them
unable
> to use after 10k hrs  might be of same concern for a sub. They are usually
> rated to 3 ATA (99 feet of sea water) for internal pressure, but I wonder
if
> that is because of the acrylic, or door attachments, o-ring seals, etc.
And it
> may be an insurance/engineering thing of little real engineering merit.
Who
> knows. From this photo - http://www.dotmed.com/listing/67798  you can see
the
> realitively straightforward construction as they are assembled with four
> massive threaded rods (threaded on ends) to seal each chamber end onto the
> tube. It'd be reasonable to fabricate a bottom flange on sub body and
> corresponding top flange with the hatch built into the top one. Simple
o-rings
> inside flange grooves receiving the tube ends would seal. Of course, like
the
> "side slip" o-rings described by Phil Nuyten a long time back, once
submerged
> the water pressure would force elements together and seal the seams and
the
> orings and wouldn't depend on the rods except for alignment. Of course it
would
> be somewhat more fragile construction and probably couldn't dive very
deep, but
> wouldn't it be cool to have all around 360 degree visibility! One can buy
the
> new tubes from a manufacturer - http://www.blanson.com/,
> http://www.blanson.com/products/hyperbarics.htm to custom wall
thicknesses, and
> yes, they say they also make windows/portholes.
>
> Of course 3 psubbers could go together to buy a tube and cut into sections
for
> towers. Maybe they have shorter (thicker) ones for less money? . . . yeah,
I
> said kooky.
>
> William Alford
>
>
>
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