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

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

sounds like you are getting ready to go deeeeeep. always prefer steel end
caps to plastic.
----- Original Message -----
From: "Greg Teiber" <wolfe19@megsinet.net>
To: <personal_submersibles@psubs.org>
Sent: Monday, August 07, 2000 11:50 PM
Subject: Re: [PSUBS-MAILIST] An Idea for a PSUB Periscope


> these camera's are cheap enough to have full coverage of the sub.  $150 a
pop if you include the casing. :)  you wouldn't need to risk having ports if
you have enough of them.
>
> *********** REPLY SEPARATOR  ***********
>
> On 8/7/00 at 10:36 PM Karl Fuller wrote:
>
> >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
> >>
> >>
>
>