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Hi Alan
I never knew new Zealanders could play rugby I always thought they suffered
from wide eyed syndrome and were very thirsty with there tongues sticking out
and very scared with there hands shaking in surrender in the air.But I do
believe the aussies can play.Just Joking. I think if one was to take a lift bag
which by the way are easy to make and used 3m velcro to keep it flat against the
rear upper hull connected by a D shackle to the rear lifting eye the only
control mechanism being a air valve the bag should be of bright color .We tow
heavy items around at slow speeds on the surface with lift bags .Just think if
you were to get stuck in a gill net ect the bag could lift the net to the
surface or even if one would want to lift something heavy to the surface if you
had a manipulator that could hold onto the the item and then use the bag to
surface where a standby diver could possibly attach the item to something
else.
All The Best
By the way I visited your country twice for the yearly Trout run at Taupo I
must admit its the most beautiful country I have ever seen.
Glen SA
----- Original Message -----
Sent: Monday, August 10, 2009 11:59
PM
Subject: Re: [PSUBS-MAILIST] Buoy
release
Some good ideas Glen,
I like the magnetic release, you could experiment a bit with it
without putting holes in your hull.
A bag of 1 cubic metre dimentions should fold up pretty small. My
tanks are going on the outside &
in that case maybe T off to a solenoid valve to
operate it & only wires will penetrate the hull.
Are you a rugby fan? You're on a roll at the moment.
Alan NZ
----- Original Message -----
Sent: Tuesday, August 11, 2009 7:43
AM
Subject: Re: [PSUBS-MAILIST] Buoy
release
Hi Frank D
How about as a release mechanism using a super magnet inside the hull
thus eliminating the need for an extra through hull a normal fishing yo yo
spool with 160 lb line with an thin elastic band trip an epirb that
switches it self on as it exits its holder and which is connected to a buoy
with a small strobe and on the buoy is clearly written that it is
attached to a psub in distress the thought of getting stuck in
soft silt or mud and because of this not been able to drop your
weights has crossed my mind on the other hand why not take a 1ton lift bag
vacuum fold it in a bag attached to the outside of your hull to one of your
lifting eyes with a d shackle a flexible air pipe from the inside of the bag
via a through hull to your air source inside the hull in other words save
yourself.
all the best
Glen SA
----- Original Message -----
Sent: Saturday, August 08, 2009 8:57
PM
Subject: Re: [PSUBS-MAILIST] Buoy
release
I've been thinking of that buoy release Dean mentioned, and I like
it. He proposed a simple turned down wooden closet rod, with fishing line
wrapped around it's turned down middle section, and sealed up so it
doesn't get water logged.
My thought is to use something like that, and have it encased in a
two inch pipe sticking into the hull near the sub's top with a
welded bottom cap. The pipe ( of course ) will be connected to a ball
valve and to release the buoy, just open the ball valve and the buoy will
float up, unspooling the fishing line as it ascends. With a 2 inch
pipe/valve there is enough space to make a buoy a little more
sophisticated than just a closet rod. I was thinking along the lines of a
buoy with a light on top, and maybe an antenna and signal device built in,
about the size of a flashlight. The device can be turned on at the
beginning of each dive and stowed in it's release tube.
Like the dive lights in my dive planes, the batteries will be simple
"D" cells giving me easy access and cheap replacement, and no thru-hulls
or wiring to deal with. Just put fresh "D" cells in there when I dive and
turn them on when launching. If I will be going up and down all day, It's
real easy to just pull the dive lights out of the dive plane "wings", pop
in new batteries, and stuff the dive lights back into the wings. Same with
the buoy. I would expect the batteries in the buoy to last several days,
with just a low power LED for a beacon, and an intermittent signal sending
unit. The fishing line cable will need to be pretty small, but is not used
for leading a grapple hook down so only has to hold on to the buoy and
could be 1000 feet long with room to spare. Plus, It's cheap and easy to
replace the line during regular maintenance. Now, I won't be able to reel
it in from inside the sub, but I don't see that as being very necessary,
as a buoy release only happens when you're in serious trouble. Got any
thoughts on this ? Frank D.
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