From: Warren Greenway <opensourcesub@yahoo.com>
Reply-To: personal_submersibles@psubs.org
To: personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST] battery acid? & battery issue follow up
Date: Wed, 18 Feb 2004 08:35:49 -0800 (PST)
Try mixing 95W gear lube and iron fillings (course
"powder"). I think you will find that it is non-toxic,
cheap, and pumpable. (Though not as heavy as mercury)
Warren.
--- Brian Cox <ojaibees@ojai.net> wrote:
> I don't see any problem with using a mercury trim
> system that's what I was planning to do
>
> Briian Cox
> ----- Original Message -----
> From: "Coalbunny" <coalbunny@vcn.com>
> To: <personal_submersibles@psubs.org>
> Sent: Tuesday, February 17, 2004 2:49 AM
> Subject: Re: [PSUBS-MAILIST] battery acid? & battery
> issue follow up
>
>
> > Shawn, that is something that I have wondered
> about- will the ballast
> > shift? I have read how a number of scientific
> units used lead or steel
> > shot. Is there anything that prohibits that being
> used? IIRC at one
> > time even mercury was used. Of course we know the
> environmental
> > implications from that. One thing I thought of
> using that should be
> > cost effective and would be environmentally
> friendly is the use of sand
> > or gravel. But since I have no real unit to use
> that ballast method
> > with, I have no idea if it'll work.
> > Carl
> >
> >
> > NeophyteSG@aol.com wrote:
> > > In a message dated 2/16/04 5:47:29 AM Pacific
> Standard Time,
> > > Asmyth@changepoint.com writes:
> > >
> > > Because Solo is intended as a "flying" sub,
> it's designed to have a
> > > very small self-righting moment. [snip] If
> Solo had conventional
> > > stability, she could never roll or fly
> inverted.
> > >
> > > Totally understand. My design is facing similar
> constraints except that
> > > all my nonessentials are fared external to the
> pressure hull which, Sgt.
> > > Pepper-ish, is much smaller than yours appears
> to be. In my case, I'm
> > > juggling axiometric placement of everything in
> the horizontal and
> > > vertical planes through the hull's longitudinal
> axis, leaving the drop
> > > weight(s) placement until near the end to
> essentially force the righting
> > > moment equations to balance. I also liked the
> idea of essentially being
> > > able to use just about everything except the
> pressure hull as a drop
> > > weight should the absolute need arise.
> > >
> > > What gave me a worse headache was trying to
> figure out a functional
> > > ballast system for a craft which will
> hypothetically have six degrees of
> > > freedom, won't "slosh" around (changing the
> center of buoyancy), and
> > > will work no matter what the orientation of the
> craft ... including
> > > upside down.
> > >
> > > Given the batteries are snug against the
> hull "ceiling", I can't
> > > reach the lugs to connect the cables unless
> they are upside down.
> > > Plus, I don't want the lugs shorting out
> against the hull. If they
> > > cannot go upside down, I'll probably have to
> lower everything by
> > > about 3". Plus, all the cables will now be a
> few inches too short.
> > >
> > > Aside from simply not having the room, you're
> making me glad that I
> > > chose to mount all but the two emergency reserve
> batteries outboard ...
> > > not meaning to take pleasure from your pain. :)
> > >
> > >
> > > In a message dated 2/16/04 7:00:24 AM Pacific
> Standard Time,
> > > Asmyth@changepoint.com writes:
> > >
> > > The Lifelines can be used in any position,
> but only charged upright.
> > > The Optimas can be used or charged in any
> position at all.
> > > Unfortunately, I can't do a straight
> replacement because Optima
> > > doesn't make a battery as large as the ones
> I'm using. So it looks
> > > like I need to modify my hardware and
> calculations to turn them
> > > right side up
> > >
> > > FWIW, possible KISS solution: Incorporate a
> pivot and latch into the
> > > mounting hardware whereby you can drop them down
> into an upright
> > > position for charging -- when you won't be
> occupying that space -- then
> > > latch them back upside down and against the hull
> during dives. If the
> > > current cabling reaches the lugs in their upside
> down position, you
> > > won't even have to lengthen them because they'll
> just need to rotate
> > > 180-degrees. Make sense?
> > >
> > > Warm Regards
> > > Shawn
> > >
> > >
> > > *****
> > >
> > > "Call nothing thy own except thy soul.
> > > Love not what thou art, but only what thou may
> become.
> > > Do not pursue pleasure, for thou may have the
> misfortune to overtake it...
> > > Live in the vision of that one for whom great
> deeds are done ..."
> > >
> > > Man of LaMancha, D. Wasserman
> >
> > --
> > Spotted Owl...it's what's for dinner.
> >
> >
>
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