Stab Jacket / BCD ???

Dan Bracuk wrote

> I heard of that gas trapping thing but never actually experienced it.
> At least not that I noticed.

I didn't either, but it's the only way I can explain how I took 10 - 12 lbs
of lead off by the addition of a 6 lb stainless plate and maybe a 1 or 2 lb
single tank adapter. I suspect that the gas may have been trapped in the
hollow plastic back pack that's part of the jacket style BCD I used to wear.

Lee

> Hello Lee, I've heard this claim about gas trapping and dropping of
> weight with plate/wing a number of times. A couple of years ago I changed
> from backplate to Zeagle Escape ( a soft BC with a wing) and I've looked
> through my log book and in identical conditions I see no difference in the
> amount of weight total I carry. When I add the total weight including the
> plate and single tank adapter it works out the same overall.

> I wonder if the gas trapping takes place in BC that use a jacket bladder
> that wraps around. I could see it happening there as it may be hard to
> purge all air. It's hard to see how gas trapping can take place in a wing
> like in the Escape.

The difference is most often reported between jacket style BCDs and rear
inflation wings. The Zeagle Escape is, if I'm not mistaken, a rear
inflation wing.

I don't know where the air trapping may be, but I suspect that with my
SeaQuest Spectrum BCD, at least part of it was in the plastic plate. I
believe it was hollow and, while it had some small holes at the bottom, I
doubt that gas trapped inside escaped easily. Regardless of where the gas
was trapped, the need for less weight is pretty well documented.

Lee

I haven't seen it with the ScubaPro classic.


"Douglas W "Popeye" Frederick" <Popeye@finalprotectivefire.com> wrote in
message news:12uk988kt9ti5c9@news.supernews.com...
> "Adam Helberg" <sendspamhere@yahee.com> wrote in message
> news:45e71d62$0$8961$4c368faf@roadrunner.com...
> >
> > "Lee Bell" <pleebell2@bellsouth.net> wrote in message
> > news:v8MEh.34702$p9.11113@bignews7.bellsouth.net.. .
> >> Dan Bracuk wrote
> >>
> >>> For you, I'm always open minded, as long as it doesn't overweight me.
> >>> Without a hunka metal on my back, I use 4 lbs of lead.
> >>
> >> If that's with a standard 80 in salt water, the steel back plate would
> >> probably be too heavy for you. I have an aluminum one you're welcome
to
> >> try too. If it's in fresh water, you might still like the steel plate.
> >>
> >> If my experience is a guide to what yours will be, you may find that
you
> >> need less, or even no lead with the aluminum plate and wing. I know
> >> that, with the steel one, I took off more lead than the difference in
> >> weight between my old SeaQuest Spectrum and the Halcyon Wing and plate.
> >> Theory is, the jacket style BCDs trap more gas. I can't say for sure,
> >> but something must have been to blame. At any rate, steel and aluminum
> >> are here if you'd like to give them a try.
> >>
> >> Lee
> >
> > Hello Lee, I've heard this claim about gas trapping and dropping of
> > weight with plate/wing a number of times. A couple of years ago I
changed
> > from backplate to Zeagle Escape ( a soft BC with a wing) and I've looked
> > through my log book and in identical conditions I see no difference in
the
> > amount of weight total I carry. When I add the total weight including
the
> > plate and single tank adapter it works out the same overall.
> >
> > I wonder if the gas trapping takes place in BC that use a jacket bladder
> > that wraps around. I could see it happening there as it may be hard to
> > purge all air. It's hard to see how gas trapping can take place in a
wing
> > like in the Escape.
>
> Gas trapping is a very real issue that I experienced myself, and have
> found on several others.
>
> Zeagle BCDs are famous for it, but I've found it in several of the
> semi-rigid wannabe-tech BCs.
>
>



--
Posted via a free Usenet account from http://www.teranews.com

"ZamaTim" <someone@microsoft.com> wrote in message
news:45ea21c0$0$16366$88260bb3@free.teranews.com.. .

>I haven't seen it with the ScubaPro classic.

I have.

I think it's more the person wearing it, than the product.

They don't pull dump, and they don't lift the LPI inflator high enough to
vent correctly.

The leave a "U" in the hose, and trap air.

> "Douglas W "Popeye" Frederick" <Popeye@finalprotectivefire.com> wrote in
> message news:12uk988kt9ti5c9@news.supernews.com...
>> "Adam Helberg" <sendspamhere@yahee.com> wrote in message
>> news:45e71d62$0$8961$4c368faf@roadrunner.com...
>> >
>> > "Lee Bell" <pleebell2@bellsouth.net> wrote in message
>> > news:v8MEh.34702$p9.11113@bignews7.bellsouth.net.. .
>> >> Dan Bracuk wrote
>> >>
>> >>> For you, I'm always open minded, as long as it doesn't overweight me.
>> >>> Without a hunka metal on my back, I use 4 lbs of lead.
>> >>
>> >> If that's with a standard 80 in salt water, the steel back plate would
>> >> probably be too heavy for you. I have an aluminum one you're welcome
> to
>> >> try too. If it's in fresh water, you might still like the steel
>> >> plate.
>> >>
>> >> If my experience is a guide to what yours will be, you may find that
> you
>> >> need less, or even no lead with the aluminum plate and wing. I know
>> >> that, with the steel one, I took off more lead than the difference in
>> >> weight between my old SeaQuest Spectrum and the Halcyon Wing and
>> >> plate.
>> >> Theory is, the jacket style BCDs trap more gas. I can't say for sure,
>> >> but something must have been to blame. At any rate, steel and
>> >> aluminum
>> >> are here if you'd like to give them a try.
>> >>
>> >> Lee
>> >
>> > Hello Lee, I've heard this claim about gas trapping and dropping of
>> > weight with plate/wing a number of times. A couple of years ago I
> changed
>> > from backplate to Zeagle Escape ( a soft BC with a wing) and I've
>> > looked
>> > through my log book and in identical conditions I see no difference in
> the
>> > amount of weight total I carry. When I add the total weight including
> the
>> > plate and single tank adapter it works out the same overall.
>> >
>> > I wonder if the gas trapping takes place in BC that use a jacket
>> > bladder
>> > that wraps around. I could see it happening there as it may be hard to
>> > purge all air. It's hard to see how gas trapping can take place in a
> wing
>> > like in the Escape.
>>
>> Gas trapping is a very real issue that I experienced myself, and have
>> found on several others.
>>
>> Zeagle BCDs are famous for it, but I've found it in several of the
>> semi-rigid wannabe-tech BCs.
>>
>>
>
>
>
> --
> Posted via a free Usenet account from http://www.teranews.com
>

That can happen on any wing or bc.

"Douglas W "Popeye" Frederick" <Popeye@finalprotectivefire.com> wrote in
message news:12uke8o2ijkq895@news.supernews.com...
> "ZamaTim" <someone@microsoft.com> wrote in message
> news:45ea21c0$0$16366$88260bb3@free.teranews.com.. .
>
> >I haven't seen it with the ScubaPro classic.
>
> I have.
>
> I think it's more the person wearing it, than the product.
>
> They don't pull dump, and they don't lift the LPI inflator high enough
to
> vent correctly.
>
> The leave a "U" in the hose, and trap air.
>
> > "Douglas W "Popeye" Frederick" <Popeye@finalprotectivefire.com> wrote in
> > message news:12uk988kt9ti5c9@news.supernews.com...
> >> "Adam Helberg" <sendspamhere@yahee.com> wrote in message
> >> news:45e71d62$0$8961$4c368faf@roadrunner.com...
> >> >
> >> > "Lee Bell" <pleebell2@bellsouth.net> wrote in message
> >> > news:v8MEh.34702$p9.11113@bignews7.bellsouth.net.. .
> >> >> Dan Bracuk wrote
> >> >>
> >> >>> For you, I'm always open minded, as long as it doesn't overweight
me.
> >> >>> Without a hunka metal on my back, I use 4 lbs of lead.
> >> >>
> >> >> If that's with a standard 80 in salt water, the steel back plate
would
> >> >> probably be too heavy for you. I have an aluminum one you're
welcome
> > to
> >> >> try too. If it's in fresh water, you might still like the steel
> >> >> plate.
> >> >>
> >> >> If my experience is a guide to what yours will be, you may find that
> > you
> >> >> need less, or even no lead with the aluminum plate and wing. I know
> >> >> that, with the steel one, I took off more lead than the difference
in
> >> >> weight between my old SeaQuest Spectrum and the Halcyon Wing and
> >> >> plate.
> >> >> Theory is, the jacket style BCDs trap more gas. I can't say for
sure,
> >> >> but something must have been to blame. At any rate, steel and
> >> >> aluminum
> >> >> are here if you'd like to give them a try.
> >> >>
> >> >> Lee
> >> >
> >> > Hello Lee, I've heard this claim about gas trapping and dropping of
> >> > weight with plate/wing a number of times. A couple of years ago I
> > changed
> >> > from backplate to Zeagle Escape ( a soft BC with a wing) and I've
> >> > looked
> >> > through my log book and in identical conditions I see no difference
in
> > the
> >> > amount of weight total I carry. When I add the total weight including
> > the
> >> > plate and single tank adapter it works out the same overall.
> >> >
> >> > I wonder if the gas trapping takes place in BC that use a jacket
> >> > bladder
> >> > that wraps around. I could see it happening there as it may be hard
to
> >> > purge all air. It's hard to see how gas trapping can take place in a
> > wing
> >> > like in the Escape.
> >>
> >> Gas trapping is a very real issue that I experienced myself, and have
> >> found on several others.
> >>
> >> Zeagle BCDs are famous for it, but I've found it in several of the
> >> semi-rigid wannabe-tech BCs.
> >>
> >>
> >
> >
> >
> > --
> > Posted via a free Usenet account from http://www.teranews.com
> >
>
>



--
Posted via a free Usenet account from http://www.teranews.com

Absolutely.

Like I said, more the person wearing it.

I seem to notice it more on the heavier, more substantial BCs.

I went so far as to put a pull-dump on my short Halcyon hose.

--


Popeye
"The deadliest weapon in the world is a Marine and
his rifle." Gen. John "Black Jack" Pershing, U.S. Army
Commander of American Forces in World War I
www.finalprotectivefire.com

"ZamaTim" <someone@microsoft.com> wrote in message
news:45ee04cb$0$16311$88260bb3@free.teranews.com.. .
> That can happen on any wing or bc.
>
> "Douglas W "Popeye" Frederick" <Popeye@finalprotectivefire.com> wrote in
> message news:12uke8o2ijkq895@news.supernews.com...
>> "ZamaTim" <someone@microsoft.com> wrote in message
>> news:45ea21c0$0$16366$88260bb3@free.teranews.com.. .
>>
>> >I haven't seen it with the ScubaPro classic.
>>
>> I have.
>>
>> I think it's more the person wearing it, than the product.
>>
>> They don't pull dump, and they don't lift the LPI inflator high enough
> to
>> vent correctly.
>>
>> The leave a "U" in the hose, and trap air.
>>
>> > "Douglas W "Popeye" Frederick" <Popeye@finalprotectivefire.com> wrote
>> > in
>> > message news:12uk988kt9ti5c9@news.supernews.com...
>> >> "Adam Helberg" <sendspamhere@yahee.com> wrote in message
>> >> news:45e71d62$0$8961$4c368faf@roadrunner.com...
>> >> >
>> >> > "Lee Bell" <pleebell2@bellsouth.net> wrote in message
>> >> > news:v8MEh.34702$p9.11113@bignews7.bellsouth.net.. .
>> >> >> Dan Bracuk wrote
>> >> >>
>> >> >>> For you, I'm always open minded, as long as it doesn't overweight
> me.
>> >> >>> Without a hunka metal on my back, I use 4 lbs of lead.
>> >> >>
>> >> >> If that's with a standard 80 in salt water, the steel back plate
> would
>> >> >> probably be too heavy for you. I have an aluminum one you're
> welcome
>> > to
>> >> >> try too. If it's in fresh water, you might still like the steel
>> >> >> plate.
>> >> >>
>> >> >> If my experience is a guide to what yours will be, you may find
>> >> >> that
>> > you
>> >> >> need less, or even no lead with the aluminum plate and wing. I
>> >> >> know
>> >> >> that, with the steel one, I took off more lead than the difference
> in
>> >> >> weight between my old SeaQuest Spectrum and the Halcyon Wing and
>> >> >> plate.
>> >> >> Theory is, the jacket style BCDs trap more gas. I can't say for
> sure,
>> >> >> but something must have been to blame. At any rate, steel and
>> >> >> aluminum
>> >> >> are here if you'd like to give them a try.
>> >> >>
>> >> >> Lee
>> >> >
>> >> > Hello Lee, I've heard this claim about gas trapping and dropping of
>> >> > weight with plate/wing a number of times. A couple of years ago I
>> > changed
>> >> > from backplate to Zeagle Escape ( a soft BC with a wing) and I've
>> >> > looked
>> >> > through my log book and in identical conditions I see no difference
> in
>> > the
>> >> > amount of weight total I carry. When I add the total weight
>> >> > including
>> > the
>> >> > plate and single tank adapter it works out the same overall.
>> >> >
>> >> > I wonder if the gas trapping takes place in BC that use a jacket
>> >> > bladder
>> >> > that wraps around. I could see it happening there as it may be hard
> to
>> >> > purge all air. It's hard to see how gas trapping can take place in a
>> > wing
>> >> > like in the Escape.
>> >>
>> >> Gas trapping is a very real issue that I experienced myself, and
>> >> have
>> >> found on several others.
>> >>
>> >> Zeagle BCDs are famous for it, but I've found it in several of the
>> >> semi-rigid wannabe-tech BCs.
>> >>
>> >>
>> >
>> >
>> >
>> > --
>> > Posted via a free Usenet account from http://www.teranews.com
>> >
>>
>>
>
>
>
> --
> Posted via a free Usenet account from http://www.teranews.com
>