Brian Whatcott wrote:
On Mon, 21 Nov 2005 10:49:53 +1100, "d parker"
wrote:


"News f2s" wrote in message
...

///


Well, once a month I take a swim with a wire brush, take a few deep
breaths and the see how long I can stay underwater hanging on to the prop
shaft. But then I'm in warm water (never less than 18C) and it's clean and
clear.

Sorry, didn't really answer your question, but that's my conventional
wisdom on the subject.

JimB


hmmm... Ever thought of attaching a regular snorkel to some larger hose?
Vacuum hose is great with a float at the loose end. You can stay down a lot
longer. Some of the co2 you exhale will get re-inhaled each time. I havent
passed out yet though.. Fingers crossed.

DP



How about a y fitting from the snorkel to two vacuum hoses, the float
on one would have a caged ping pong ball for an outflow only
and the float on the other would have a soft sprung flapper for an
inflow only??

Brian Whatcott Altus OK


All you need is an exhalation valve at the mask, and an iron lung to
enable you to suck air below about 4 feet. Try it, just suck in
through the mouth using a harden hose and exhale through your nose.
Good luck.

Or a powered snorkel pump on a float on the surface, know as a
hooka, and some dive weights.

Terry K

"Terry Spragg" wrote in message
...
Brian Whatcott wrote:
On Mon, 21 Nov 2005 10:49:53 +1100, "d parker"
wrote:


"News f2s" wrote in message
...

///


Well, once a month I take a swim with a wire brush, take a few deep
breaths and the see how long I can stay underwater hanging on to the
prop shaft. But then I'm in warm water (never less than 18C) and it's
clean and clear.

Sorry, didn't really answer your question, but that's my conventional
wisdom on the subject.

JimB


hmmm... Ever thought of attaching a regular snorkel to some larger hose?
Vacuum hose is great with a float at the loose end. You can stay down a
lot longer. Some of the co2 you exhale will get re-inhaled each time. I
havent passed out yet though.. Fingers crossed.

DP


How about a y fitting from the snorkel to two vacuum hoses, the float
on one would have a caged ping pong ball for an outflow only
and the float on the other would have a soft sprung flapper for an
inflow only??

Brian Whatcott Altus OK


All you need is an exhalation valve at the mask, and an iron lung to
enable you to suck air below about 4 feet. Try it, just suck in through
the mouth using a harden hose and exhale through your nose. Good luck.

Or a powered snorkel pump on a float on the surface, know as a hooka, and
some dive weights.

Terry K


Yeh the harden hose is difficult at longer lengths. So is garden hose. Thats
why, in my initial post, i recomened a larger diameter hose you see

DP

In article ,
d parker wrote:
All you need is an exhalation valve at the mask, and an iron lung to
enable you to suck air below about 4 feet. Try it, just suck in through
the mouth using a harden hose and exhale through your nose. Good luck.

Or a powered snorkel pump on a float on the surface, know as a hooka, and
some dive weights.

Terry K


Yeh the harden hose is difficult at longer lengths. So is garden hose. Thats
why, in my initial post, i recomened a larger diameter hose you see

When I was a kid, we decided to try this at the bottom of a swimming
pool. I volunteered to be try breathing with the hose. There were four
of us. I went below with the hose, then the other three kids took deep
breaths and blew into the hose topside. I was able to extend my bottom
time by about 2 minutes, until they got winded and I got dizzy. Well,
I'm still hear and probably didn't damage too many brain cells.


--
"j" ganz @@
www.sailnow.com

Jonathan Ganz wrote:
In article ,
d parker wrote:

All you need is an exhalation valve at the mask, and an iron lung to
enable you to suck air below about 4 feet. Try it, just suck in through
the mouth using a harden hose and exhale through your nose. Good luck.

Or a powered snorkel pump on a float on the surface, know as a hooka, and
some dive weights.

Terry K


Yeh the harden hose is difficult at longer lengths. So is garden hose. Thats
why, in my initial post, i recomened a larger diameter hose you see


When I was a kid, we decided to try this at the bottom of a swimming
pool. I volunteered to be try breathing with the hose. There were four
of us. I went below with the hose, then the other three kids took deep
breaths and blew into the hose topside. I was able to extend my bottom
time by about 2 minutes, until they got winded and I got dizzy. Well,
I'm still hear and probably didn't damage too many brain cells.


Damaged them enough to use hear instead of here.

"Terry Spragg" wrote in message
...
Well, once a month I take a swim with a wire brush, take a few
deep breaths and the see how long I can stay underwater
hanging on to the prop shaft. But then I'm in warm water
(never less than 18C) and it's clean and clear.

hmmm... Ever thought of attaching a regular snorkel to some
larger hose? Vacuum hose is great with a float at the loose
end. You can stay down a lot longer. Some of the co2 you exhale
will get re-inhaled each time.

How about a y fitting from the snorkel to two vacuum hoses, the
float
on one would have a caged ping pong ball for an outflow only
and the float on the other would have a soft sprung flapper for
an
inflow only??

All you need is an exhalation valve at the mask, and an iron
lung to enable you to suck air below about 4 feet. Try it, just
suck in through the mouth using a harden hose and exhale through
your nose.

OK. Full story. Snorkel is attached to a long hose which goes up
to the deck. Mask covers nose and eyes only. I breath out through
the nose (which then bubbles out through the edges of the mask,
good one way valve) and breath in through the snorkel. No need for
any balls (unless the alligators are hungry). I've scrubbed a
whole bottom this way.

But I don't recommend anyone doing this unless they do some
shallow water practice first, sitting in a pool. Ask a friend (!)
to disconnect/block/duck the hose end into the water at random
times to familiarise yourself with recovery routines. Then do this
deeper. The purpose of these practice sessions, which you should
do several times, is to get the feel of an imminent mouthful of
water coming down the line, and develop routines to reduce your
panic levels when it happens. Otherwise, feeling that gurgle in
the pipe when you've just breathed out is quite a downer . . .
don't ask.

Oh, and have someone on deck looking out for you, with a bit of
string to give you a couple of tugs if you should quickly come up
for some reason.

JimB

This stuff will work, but is expensive: http://www.propspeed.com/

On Sun, 20 Nov 2005 23:00:22 -0400, Terry Spragg wrote:

Brian Whatcott wrote:
All you need is an exhalation valve at the mask, and an iron lung to
enable you to suck air below about 4 feet. Try it, just suck in
through the mouth using a harden hose and exhale through your nose.
Good luck.

Good Luck indeed, because if you go too far you are liable to have your
lungs being sucked up the hose is what I heard (not sure how deep is too
deep, anybody?)

Or a powered snorkel pump on a float on the surface, know as a
hooka, and some dive weights.

that works, I've done that..

--
http://maps.google.com/maps?q=irelan...244,0.0822&t=k

Iain Hibbert wrote:
On Sun, 20 Nov 2005 23:00:22 -0400, Terry Spragg wrote:


Brian Whatcott wrote:
All you need is an exhalation valve at the mask, and an iron lung to
enable you to suck air below about 4 feet. Try it, just suck in
through the mouth using a harden hose and exhale through your nose.
Good luck.


Good Luck indeed, because if you go too far you are liable to have your
lungs being sucked up the hose is what I heard (not sure how deep is too
deep, anybody?)
That's dumb. All that happens is the hose collapses from the pressure.
Nothing is going to push your lungs up the hose.......duh.


Or a powered snorkel pump on a float on the surface, know as a
hooka, and some dive weights.


that works, I've done that..

Well, then just sit on the bottom at the shallow end of the pool so
that your head is about a foot under water, your lungs about 2 feet
under. Then take a standard, one foot long snorkeling snorkel in your
mouth upside down, so that you can point it to the surface.
Try to inhale.
This won't suck up your lungs, but give you a good idea of the
principle.
That's why snorkels are so short, duh.
While you are in the pool take a thin garden hose to the deep end and
see at what pressure it collapses. Don't try to inhale through it, you
would just exhale quicker and deeper than you wanted.

"Gary" wrote in message
news:ixPgf.570915$oW2.460791@pd7tw1no...
Iain Hibbert wrote:

Good Luck indeed, because if you go too far you are liable to
have your
lungs being sucked up the hose is what I heard (not sure how
deep is too
deep, anybody?)
That's dumb. All that happens is the hose collapses from the
pressure. Nothing is going to push your lungs up the
hose.......duh.

What happens is that as you go deeper it becomes progressively
more difficult to breath in, because your lung pressure is at
atmospheric, whilst the water pressure is increasing at about half
a pound per square inch for each foot of depth. The 'squeeze' that
another poster has referred to. This limits me to a depth of about
4 - 5ft. Any deeper and I have a coughing fit after re-surfacing.
Apparently that's caused by bits of the lungs collapsing, and the
coughing is a reaction to the little subchambers unsticking again.
Nasty feeling.

That's another reason why I say - you don't do this without plenty
of previous practice in the swimming pool to check out the feeling
of all the things which may go wrong. Better just take that deep
breath . . . air breathing diving of any sort is full of traps for
the unwary.

JimB