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

[Steve Shawl <steve@yel-o-sub.com>]

O.k. now I know what type of camera. 
Sorry if my messages just got in the way.

Could anyone with a website please email me at steve@yel-o-sub.com
Thanks,
Steve



On Tue, 8 Aug 2000 00:15:25 -0500, personal_submersibles@psubs.org wrote:
>My thoughts also exactly.  In addition, I would also remind of the fact that
>what we are talking about is a "lipstick" size camara.  The less diameter,
>the less affect pressure has on it.  The fin design heatsink you refer to
>would not necessarily increase the O.D. to such an extent as to be
>unmanageable, or overly a hindrance to streamlining concerns.  It could
>probably be fashioned into a 1-1/2"  to 2" bullet shaped pod mounted atop a
>semi-verticle forward leaning aerodynamically shaped arm just ahead and
>above  the con-tower.
>-----Original Message-----
>From: Karl Fuller <fullerk@voyager.co.nz>
>To: personal_submersibles@psubs.org <personal_submersibles@psubs.org>
>Date: Monday, August 07, 2000 10:33 PM
>Subject: Re: [PSUBS-MAILIST] An Idea for a PSUB Periscope
>
>
>>Would this idea make sense ?
>>Mount the camera chip inside a tube made of a heat conductive material,
>like
>>aluminum. To increase the dissipation of heat by increasing the absorption
>>area, fins, made by drilling holes and then boring out the tube to create
>>the fins, could be made. Hacksaw slots might be better. Further holes could
>>be drilled to (like a revolver six shot chamber) that the external water
>(or
>>air) could flow through to increase the dissipation of heat. Once again,
>>hacksaw slots would be better. The outside could be painted white as
>>peviously mentioned, to reflect the sun's heat.
>>Karl.
>>
>>----- Original Message -----
>>From: Greg Teiber <wolfe19@megsinet.net>
>>To: <personal_submersibles@psubs.org>
>>Sent: Monday, August 07, 2000 11:01 PM
>>Subject: Re: [PSUBS-MAILIST] An Idea for a PSUB Periscope
>>
>>
>>> 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 feet.
>>>
>>> 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 this application)  will withstand more
>>than 200psi, so water bursting th cooling pipes isn't a problem.  "thermal"
>>windows are not for their insulation value, but for their anti fog value.
>>>
>>> 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.
>>> >
>>> >
>>>
>>>
>>