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I happen to like eating fish. If it can go
wrong it will go wrong? There's a lot of those in a sub ! I'm just
trying to eliminate one of them by using a proven system for trimming my ballast
!
Brian
----- Original Message -----
Sent: Wednesday, February 18, 2004 5:14
AM
Subject: Re: [PSUBS-MAILIST] battery
acid? & battery issue follow up
Brian,
No one PLANS on drinking mercury,
but remember Murphy's law.
I bet no one planned to have you
eat mercury the last time you ate fish either.
If it can go wrong, eventually it
will.
Dan H.
----- Original Message -----
Sent: Wednesday, February 18, 2004 2:34
AM
Subject: Re: [PSUBS-MAILIST] battery
acid? & battery issue follow up
I don't intended on drinking it, and it will be
in a closed loop and sealed. The fact that it is liquid makes it ideal
for pumping from point A to point B.
Brian
----- Original Message -----
Sent: Tuesday, February 17, 2004 6:30
PM
Subject: Re: [PSUBS-MAILIST] battery
acid? & battery issue follow up
The good news is that is weighs 246 pounds a quart. The bad is it's
toxic waste, and evaporates easily. It has gone from being expensive to
being a liability. My advice is stick with lead, slide it if you need
to.
-Peter
Does anybody know where I can get some
mercury ?
Brian Cox
----- Original Message -----
Sent: Tuesday, February 17, 2004
3:04 PM
Subject: Re: [PSUBS-MAILIST]
battery acid? & battery issue follow up
I can cast lead.
Carl,
Sand
or gravel is to light for ballast in a sub. It's mass is so much
more
then lead for the same weight that it's impractical in a
compact sub. A
load of gravel in a pickup truck pretty much fills
the box. If it were
lead, it would be a sheet on the bottom of
the floor.
Remember it only the displacement over and above what
the same mass of water
weighs that's effective as
ballast.
Dan H.
----- Original Message -----
From:
"Coalbunny"
To:
Sent: Tuesday, February 17,
2004 5:49 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 smalle! r 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 lu! gs 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.
>
>
Fact is stranger
than fiction. Truth is stronger than fact. R. Duncan
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