Re: [PSUBS-MAILIST] An Idea for a PSUB Periscope

[Ray Keefer <Ray.Keefer@west.sun.com>]

Hi,

One of my day dreams is tooling around out in the Pacific and suddenly
doing a "Crazy Ivan". On my fishfinder forward looking sonar a big blip
that turns out to be a nuke sub. The sub was following me to give their
sonar men an opportunaty to practice and were collecting a sound
profile of my PSUB for the archives.

I wonder if a PSUB could have a rearward mounted sonar since their
slow speed wouldn't disturb the water much and there isn't 
a hugh prob wake.

Regards,
Ray

> From: "samdatl" <samdatl@avana.net>
> To: <personal_submersibles@psubs.org>
> Subject: Re: [PSUBS-MAILIST] An Idea for a PSUB  Periscope
> Date: Mon, 7 Aug 2000 23:42:41 -0400
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> 
> 007 is watching you! you might need the rear view
> ----- Original Message -----
> From: "Karl Fuller" <fullerk@voyager.co.nz>
> To: <personal_submersibles@psubs.org>
> Sent: Monday, August 07, 2000 10:36 PM
> Subject: Re: [PSUBS-MAILIST] An Idea for a PSUB Periscope
> 
> 
> > Yes it would be in my case Steve, and as high as possible or able to be
> > extended like a proper periscope. Of course, there are other locations an
> > outside camera would be useful to have too. Like an astern view to see
> what
> > is caught in the prop or what is following you !
> > Karl
> > ----- Original Message -----
> > From: Steve Shawl <steve@yel-o-sub.com>
> > To: <personal_submersibles@psubs.org>
> > Sent: Monday, August 07, 2000 11:12 PM
> > Subject: Re: [PSUBS-MAILIST] An Idea for a PSUB Periscope
> >
> >
> > > On Mon, 07 Aug 2000 22:01:49 -0500, personal_submersibles@psubs.org
> wrote:
> > > >i was thinking of having the pump in the camera housing.  so all it has
> > to do is pull water up a max of a 6' head.  and that water would
> > > be compensated by the water traveling down the other side.  so the
> actuall
> > head pressure would be in the inches not fe
> > > >And you completely missed what I ment about the cooling tube. First
> thing
> > is that doubble pane lenses would be needed because
> > > the inside of the tube would be most likely lower than than the
> > surrounding air.  1/8" copper tubing (which would be perfect for
> > > >the cooling tubes would keep the camera chamber at a steady (cold)
> temp.
> > Though as before that would make the window on the
> > > camera pod want to fog, Therefore he thermal window pane.
> > > >
> > > >I'm open to any other criticisms of my idea :)
> > > >
> > > >
> > > >*********** REPLY SEPARATOR  ***********
> > > >
> > > >On 8/7/00 at 9:21 PM Gary R. Boucher wrote:
> > > >
> > > >>It's not that easy.  Lets say you get a pump.  It has to be a low
> > > >>voltage pump unless you plan to use a converter.  Pumps designed to
> work
> > on
> > > >>the surface will not necessarily work 20 feet below the surface.  You
> > may
> > > >>have to pressure compensate the pump.  You could put the pump inside
> the
> > > >>hull but then you have to have some way to get the water through the
> > hull
> > > >>interface.  Of course the pump will have to be able to handle the
> > pressure
> > > >>at depth.
> > > >>     The double pane idea seems reasonable at first but the problem
> you
> > > >>have is two-fold.  Not only are you trying to make the outside
> > temperature
> > > >>of the tube as low as possible you WANT the heat generated inside the
> > > >>camera to pass through the tube and on our, otherwise the temperature
> > > >>inside will increase till there is damage.  You want conduction
> through
> > the
> > > >>tube, as much as possible.  You just want the tube to be a good
> radiator
> > of
> > > >>the heat absorbed and generated.  What would help would to be to place
> a
> > > >>shield on top of the tube where air can circulate under the shield.
> > This
> > > >>would place the tube in the shade in essence lowering the temperature
> > that
> > > >>would exist if exposed to sunlight.
> > > >>     BTW whatever method you use has to be able to stand the pressure.
> > > >>     I took some photos with my digital camera of what I have, but am
> > > >>having some trouble uploading them into the computer.  I will get them
> > > >>uploaded one way or the other.  When I do, I will send photos of my
> > design
> > > >>out to anyone interested if they will send me an email.
> > > >>
> > > >>
> > >
> > >
> > > Is the camera in a seperate case outside of the sub?
> > > Steve Shawl - steve@yel-o-sub.com
> > >
> > >
>