DIR and Poseidon

On Wed, 13 Aug 2003 15:28:44 GMT, "Jon C" <jon@jonnythan.com> wrote:

>You might want to go find your regs and look at them really closely. They
>don't say Apex.
>
>At least....... I hope they don't :)

I think I'm going to put my Roldex watch on Ebay.


--- Rich
http://richlockyer.tripod.com/

Jim.Greenlee@cc.gatech.edu wrote:

>>>Non-standard second stage design is less hydrodynamic, increases jaw
>>> fatigue, and complicates air sharing during OOA
>>Ever used one? It's about the best reg possible to share air.
>Try explaining that to your OOA buddy when he cannot find the purge
>button right away.

Purge for your buddy when donating.

At least you can't put it upside down in your mouth.

Steven

+------------------------------------------------+
| Please use steevke at hotmail dot com to reply |
+------------------------------------------------+
| Nunc Plaudite Manibus |
+------------------------------------------------+

"Steven Tolleneer" <steevke@nospam.com> wrote in message
news:vjcmjvgrcqoc3rceol341bmboh7m4juq56@4ax.com...
> Jim.Greenlee@cc.gatech.edu wrote:
>
> >>>Non-standard second stage design is less hydrodynamic, increases jaw
> >>> fatigue, and complicates air sharing during OOA
> >>Ever used one? It's about the best reg possible to share air.
> >Try explaining that to your OOA buddy when he cannot find the purge
> >button right away.
>
> Purge for your buddy when donating.
>

Oh my god. Please, please never do this to your buddy with a Poseidon reg.

Jon

Geez, I didn't expect such a discussion.
Anyway, what's the idea behind this alternate design?

"diver" <@> wrote in message
news:3f38a52a$0$49114$e4fe514c@news.xs4all.nl...
> Hello,
>
> I read something about the fac that Poseidon regulators are not DIR, but I
> cannot find the reasons.
> Does someone have more info?
>
> Greets,
>
> Daan
>
>

Those that use them love them, those that don't haven't a clue including the
dir crowd.
They are very common on the St. Lawrence River (Canada) with the older
experienced divers. (tech / sport)
You want the strait goods go talk to someone who is certified to repair them
and has been doing for years.
All you'll get here is some recycled rhetoric.
That and a lot of false facts.

For example:
How can a exhaust diaphragm on a Pos flip over there's no room for it to do
it.
Jetstreams can't lock up because there is a relief valve in the hose just
before the second stage, so the second continues to work as if nothing is
wrong.(experience)
Cyl are down stream so they behave like other down stream regs.
I wonder if GUE gets a kick back from Apex, they jumped off the Scubapro
band wagon pretty quick.
Lack of corporate sponsorship?

What pos does have against them is cost and non standard hoses that are of
much better quality than others.
Can you say "bell" crimp if not your talking through your hat.

But, then you could always bring in the Vhs Beta augment.

The best laugh I had recently from a young dir type with his instructor near
by was this comment.

Your diving pos jetstreams they shut off with no air, so I showed him the
blow off at the second and explain how it worked.
Then he stated again that it still shuts off, when it fails.
I said if the diaphragm in the 1st stage fails yes it will.
Then I pointed out this was true of all diagram regs and that he should have
learned this in basic and only piston regs fail open.
That's why I never dive a single diaphragm reg.
I have piston regs (Sherwood's) for single tank diving (less than 90 ft)
He went over to his instructor, they both came over.
The instructor was very polite.
He pointed out the same things as the student.
He dropped his augment when I asked him what type of reg his Apex's where
(diagram I use to work on them).
He said I was correct and was a little embarrassed.

Go back to your basic knowledge about regulators all the answers are there.

Diaphragm fail closed.
Piston fail open.

Pistons have too many problems with cold water except Scubpro and Sherwood.
Scubapro allows ambient water around the piston camber wall, Sherwood
doesn't.

Or you could look up the USN test on regs

Sherwood and Poseidon always fight it out for 1st and second position in the
past.

The Apex design has been around a long time, nothing wrong with it, if
that's what you want.

I would point out though the second stage shuttle valve seat leaves a little
to be desired.

But hey if you want to put your life on two little plastic wings engaging a
thin metal demand leaver.
Then with golves on open it up and take a chance on damageing it, go for it.

If that turns your crank there are much better regs out there for taking
apart by some butter fingered, bull in a china shop type diver.


I have had this discusion with a few tech instructors and no one had an
answer including GUE.
Except they don't like them.

Steve

srspencer@hotmail.com stopped playing nethack just long enough to say:
>
>What pos does have against them is cost and non standard hoses
>Your diving pos jetstreams they shut off with no air

POS - that's exactly how I would describe them, too.

-JimG

--
Jim Greenlee (jkg@cc.gatech.edu) Normally I try to take one day
College of Computing at a time, but lately several of
Georgia Tech, Atlanta, GA 30332 them ganged up on me all at once

steevke@nospam.com stopped playing nethack just long enough to say:
>
>Purge for your buddy when donating.

Have you ever tried this with a Poseidon?

>At least you can't put it upside down in your mouth.

At least a traditional second stage can be purged without worrying
about which way your head is tilted.

-JimG

--
Jim Greenlee (jkg@cc.gatech.edu) There once was a lady named Drew
College of Computing Whose limericks stopped at line two
Georgia Tech, Atlanta, GA 30332 There once was a man named Verdun

<Jim.Greenlee@cc.gatech.edu> wrote in message
news:bhgh4j$q9d$1@news-int.gatech.edu...
> steevke@nospam.com stopped playing nethack just long enough to say:
> >
> >Purge for your buddy when donating.
>
> Have you ever tried this with a Poseidon?
>
> >At least you can't put it upside down in your mouth.
>
> At least a traditional second stage can be purged without worrying
> about which way your head is tilted.

At least a traditional second stage can be purged without worrying about
causing instant pneumothorax to your buddy.

Jon

"Rich Lockyer" said: "1st stage IP creep may lock the 2nd stage shut..."

Rich,

??????
My Poseidon 1st stage has a variable interstatic pressure....it's built to
"creep". As a matter of fact....it's important to tune the max end of this
increase to approximately 170 psi (11.5 bar) at about 300 psi (20 bar) in
the cylinder. If you don't....it doesn't "lock" up the 2nd stage...if
free-flows the end of the bottle.....

Forest Aten

Hey watch it. My Odin works fine for me and the roadrunner. No mater
what way I hand him the 2nd stage, it's never upside down.


<Jim.Greenlee@cc.gatech.edu> wrote in message
news:bhe6fq$7d$1@news-int.gatech.edu...
> jon@jonnythan.com stopped playing nethack just long enough to say:
> >
> >You might want to go find your regs and look at them really closely.
They
> >don't say Apex. At least....... I hope they don't :)
>
> Of course, if the say "Acme" and your name is Wile E. Coyote, then that
> could be a problem.
>
> -JimG
>
> --
> Jim Greenlee (jkg@cc.gatech.edu) Let the bridge computer speak
> College of Computing LOAD YOUR PROGRAM! I AM YOURSELF!
> Georgia Tech, Atlanta, GA 30332 No computer stands in my way