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Re: [PSUBS-MAILIST] Hello Everyone
Hi Bryce,
At the convention Jonathan announced the details of a
scrubber project that PSUBS LLC is sponsoring. We need
a willing voluteer and an instrumented hull to test
the current design. Esentially the design just hooks a
fan onto an existing off the shelf CO2 absorber
cartridge.
To date no volenteers, hence no progress, no finail
design to share with the community.
Regards,
Ray
--- Bryce Yarbrough <byarbrough@mac.com> wrote:
> I did check the archives as much as I could for CO2
> Scrubbers, And I
> did not find a definitive design or system listed
> anywhere. Perhaps
> it came up in September, for which the archives are
> not up yet. Who
> knows. :-)
>
>
> Bryce
>
> On Oct 4, 2007, at 12:09 AM, Sean T. Stevenson
> wrote:
>
> > Bryce, welcome to the list. You obviously have a
> lot of
> > questions. Many of
> > these can probably be answered with some further
> research. Aside from
> > scouring the internet for answers, a few good
> places to start would
> > be:
> >
> > Rules for Building and Classing underwater
> vehicles, systems and
> > hyperbaric
> > facilities, ABS
> >
> > Safety standard for pressure vessels for human
> occupancy, ASME
> >
> > Concepts in submarine design, Burcher and Rydill
> >
> > Manned submersibles, Frank Busby
> >
> > and of course, everything on the PSUBS website.
> >
> > To address a couple of your specific questions off
> the top of my
> > head - active
> > sonar is an indispensable tool for underwater
> navigation, and there
> > are many
> > units available for a wide variety of
> applications. Radar is only
> > really
> > practical on a large sub with significant height
> of antenna - where
> > this
> > makes sense, you can simply pressure compensate
> it. As for through
> > hull
> > linkages, you can achieve linear motion, but it is
> usually better
> > to stick to
> > well constrained rotary motion and convert that as
> necessary
> > outside the
> > hull. Depth determination by sonar, typically
> referred to as an
> > altimeter,
> > is not robust. Depth determination is usually
> performed with a
> > pressure
> > transducer. While there are few if any rules that
> pertain
> > specifically to
> > recreational submersibles, they are watercraft and
> as such are
> > subject to the
> > International Regulations for the Prevention of
> Collisions at Sea.
> > The FBI
> > is aware of PSubs. Your responsibility as a
> designer is merely to
> > be as
> > prudent as possible - while you may not certify
> your sub to ABS or
> > equivalent
> > standards (an arduous and expensive process), it
> couldn't hurt to
> > design to
> > those specs wherever possible. The safer we are,
> the better chance
> > we have
> > at staying deregulated. Radio does not propagate
> well through
> > water, except
> > at extremely low frequencies. GPS will not work
> when submerged.
> > Underwater
> > navigation is achieved in most PSubs simply by a
> combination of
> > sonar and
> > dead reckoning. In more advanced systems, an
> inertial measurement
> > unit can
> > provide position estimated based on accerations
> integrated over
> > time - such
> > position estimates are subject to integration
> error (inversely
> > proportional
> > to the cost of the IMU), and must be corrected
> occasionally. There
> > are many
> > different CO2 scrubbing systems - check the list
> archives.
> >
> > Good luck!
> >
> > -Sean
> >
> >
> > On October 3, 2007 20:34:42 Bryce Yarbrough wrote:
> >> Hi Everyone!
> >>
> >> My name is Bryce, Jon thought it would be a good
> idea for me to
> >> introduce myself to all 500 and something of you.
> I am 19 and based
> >> in Los Angeles, and am in the design phase of my
> submarine. (Jon also
> >> thought it would be a good idea to make sure I
> can at least post to
> >> the mailing list because for some reason, my
> email system is
> >> different then everyone else's on here and he
> wants to see if it
> >> works or not. So hopefully it goes through).
> Other then that, here is
> >> the first post I planned on putting up to the
> mailing list several
> >> days ago, but because I just have to be
> different, I got rejected
> >> several times because of my email layout, so here
> goes...
> >>
> >>
> >> Hello Everyone!
> >>
> >> I am knew to this mailing list and site, but not
> that new to the
> >> world of submarines and robotics. I have been
> actively involved in
> >> robotics throughout high school and have been
> working with them for
> >> over 6 years now. I also built a small R/C
> Submarine, and have
> >> decided that a goal of mine is to build a
> submarine. With the help of
> >> my high school (we are doing it through the
> robotics club as a
> >> project, great way to get materials, electronics,
> and money donated
> >> to the submarine) we are going to build a sub. We
> are looking at
> >> about 30 Feet long with a 5 or 6 foot beam. I
> have run into several
> >> questions, that even despite my research, I
> cannot answer at this
> >> time, so I am turning to you guys :-). (btw I am
> 19, just to let you
> >> know). My questions are (at the moment that I can
> think of):
> >>
> >> -How do you seal up a hole in the pressure hull
> that contains any
> >> such motors to control the dive planes or
> rudders, if the linkages
> >> move forwards and backwards through the hole,
> instead of just turning
> >> (any other ideas on the subject would be great)
> >>
> >> -We have decided that we want to use a Life
> Support System involving
> >> scrubbing the CO2 out of the air, and releasing
> O2 into the air when
> >> needed.
> >> -- Anyone figured out a great system to do this
> with yet?
> >> --Anyone have sensors and such equipment yet?
> >>
> >> -To recharge the ballast tanks, we want to use an
> onboard electric
> >> air compressor (I just don't like the thought of
> fuel onboard the
> >> ship), anyone have any suggestions on which ones
> to use, things to
> >> look out for?
> >>
> >> -Navigation/Electronic Equipment:
> >> -- Sonar:
> >> ---Any systems that anyone USES for their subs,
> how well they work,
> >> etc?
> >> ---Hydrophones yet?
> >> --- Active Sonar Systems?
> >> --Radar:
> >> ---Does anyone use radar for when they are on
> the surface?
>
=== message truncated ===
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