Re: [PSUBS-MAILIST] battery acid? & battery issue follow up

[Warren Greenway <opensourcesub@yahoo.com>]

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.
> > 
> > 
> 


__________________________________
Do you Yahoo!?
Yahoo! Mail SpamGuard - Read only the mail you want.
http://antispam.yahoo.com/tools