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

["samdatl" <samdatl@avana.net>]

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
> >
> >