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The story, as I got it, was that a tender opened a hatch that connected a diving
bell to the surface chamber before the two had been properly sealed together.
I've been trying to remember where I heard the story. As soon as I read my
posting, I realized the logic error you point out in the way I wrote it
originally.
Sorry
Wendell G
John Cockburn wrote:
> How on earth did he do that. All of the chambers that I have seen open in
> the way so the pressure in the chanber holds the door closed and against
> it's seal, 3 or 4 psig will hold the door well closed. The last time I was
> in a chamber (for professional reasons!!) we tried to pull the door open at
> 10 feet and two of us couldn't move it.
>
> John Cockburn,
> Scotland.
>
> ----- Original Message -----
> From: Wendell Grogan <wgrogan@dc*.ne*>
> To: <terry-1@ly*.co*>
> Cc: Matthias Voss <mat.voss@t-*.de*>; Steven Bliim
> <Steven.Bliim@Mc*.co*.au*>; Techdiver@Aquanaut.Com
> <techdiver@aquanaut.com>
> Sent: Tuesday, November 21, 2000 12:35 PM
> Subject: Re: re nitrogen elimination and oxygen
>
> > In addition to being cynical, I was also being ironic. In a sudden
> chamber decompression, everyone inside dies and there is a high risk of
> injury from shrapnel from anyone standing nearby. I haven't
> > heard of this happening to a chamber recently, but there was a case not
> too long ago of a tender opening a chamber door from the inside while it was
> still pressurized- not a pretty sight.
> > Wendell G
> >
> > Terry Michael wrote:
> >
> > > Does this pose any danger to the operator?
> > > What about the tender?
> > >
> > >
> > > --
> > >
> > > On Wed, 15 Nov 2000 20:49:36
> > > Wendell Grogan wrote:
> > > >As cynical as I am, I think the slightly less malignant explanation for
> this is that a poorly maintained chamber is likely to blow out ("sudden
> unplanned decompression") at more than 60fsw pressure
> > > >(the max on 5). Since there might be a chamber attendant in or near
> the chamber, they probably don't want to run that risk.
> > > >Wendell G
> > > >
> > > >Terry Michael wrote:
> > > >
> > > >> Unfortunately you don't often have a choice.
> > > >> I've heard that of some of the chambers (down in Mexico for example)
> run for profit and will start you on a USNAVY 5 just to milk you for more
> sessions.... I think they were affiliated with DAN.
> > > >>
> > > >>
> > > >> --
> > > >>
> > > >> On Wed, 15 Nov 2000 00:25:57
> > > >> Matthias Voss wrote:
> > > >> >Wendell,
> > > >> >if this is because of He, I wonder why. Perhaps because of the lower
> > > >> >density of the mix, this gives less work of breathing, so less CO2
> > > >> >buildup , and perhaps a better ventilation, which in return helps
> > > >> >harvest the benefits of the remaining oxygen.
> > > >> >regards
> > > >> >Matthias
> > > >> >
> > > >> >wgrogan@dc*.ne* schrieb:
> > > >> >>
> > > >> >> Matthias-
> > > >> >> I did not mean to suggest that higher pressures, especially at the
> beginning
> > > >> >> of treatment, might not be needed.
> > > >> >> Rather, instead of using pure O2 at the 60 fsw level, this work
> shows that recovery
> > > >> >> is better when heliox is used. You still get the positive effects
> of the increased
> > > >> >> pressure on the bubbles, but without the negative effects of high
> oxygen tensions
> > > >> >> at those pressures.
> > > >> >> Wendell
> > > >> >>
> > > >> >> >Wendell,
> > > >> >> >the Kiel's Navy Chamber former Chief officer was reported saying
> that he
> > > >> >> >needed the extra pressure to crush down the organic matter
> surrounding
> > > >> >> >the bubbles.
> > > >> >> >My aquaintance worked with him as an medical assistant .
> > > >> >> >regards
> > > >> >> >Matthias
> > > >> >--
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> > >
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