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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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