[PSUBS-MAILIST] Personal_Submersibles Digest, Vol 45, Issue 5

Sat Mar 4 17:17:54 EST 2017

Does anyone know where I can buy the k250 plans the website isn't working
please help thanks my email is bowmanfrankie at gmail

On Mar 3, 2017 10:11 PM, "via Personal_Submersibles" <
personal_submersibles at psubs.org> wrote:

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>    1. Re: formula (Alan via Personal_Submersibles)
>    2. Re: formula (Al Secor via Personal_Submersibles)
>
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> ----------------------------------------------------------------------
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> Message: 1
> Date: Sat, 4 Mar 2017 12:03:02 +1300
> From: Alan via Personal_Submersibles <personal_submersibles at psubs.org>
> To: Personal Submersibles General Discussion
>         <personal_submersibles at psubs.org>
> Subject: Re: [PSUBS-MAILIST] formula
> Message-ID: <291F53AD-584B-4217-93D1-C17CDF1F442D at yahoo.com>
> Content-Type: text/plain; charset="us-ascii"
>
> OK,
> I concur with Cliff. I divided  the 1500psi by 14.7 to get the number
> of atmospheres, then x that x 10.7 ( number of cubic feet) then x .0807
> (weight per cubic ft.)
> Alan
> Sent from my iPad
>
> > On 4/03/2017, at 11:46 AM, hank pronk via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
> >
> > Alan,
> > Internal volume atmospheric pressure.
> > Hank
> >
> >
> > On Friday, March 3, 2017 3:24 PM, Alan via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
> >
> >
> > Hank,
> > firstly in the US they refer to scuba tanks by their filled volume ie.
> > a 80 cu ft tank has 80 cu ft of air when filled. Whereas the rest of the
> > World tends to refer to the internal volume of the tank in litres ie. a
> > 10 litre dive tank.
> > By 10.7 cubic feet are you referring to internal volume or filled
> capacity?
> > Alan
> >
> >
> > Sent from my iPad
> >
> >> On 4/03/2017, at 10:30 AM, Cliff Redus via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
> >>
> >> 84.8 lbs assuming a 60F ambient temperature.  See attached derivation.
> >>
> >> Cliff
> >>
> >> On Fri, Mar 3, 2017 at 2:52 PM, hank pronk via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
> >> Alan,
> >> I need to know how much  a 10.7 cubic foot tank will extra when pumped
> up to 1,500 psi.  And how many cubic feet of air will I have when it is
> pumped up.
> >> Hank
> >>
> >>
> >> On Friday, March 3, 2017 12:28 PM, Alan via Personal_Submersibles
> <personal_submersibles at psubs. org> wrote:
> >>
> >>
> >>
> >> Hank,
> >> air weighs .0807 lbs per cubic foot approximately, depending on
> temperature.
> >> So if you have an 80 cubic foot scuba tank the air weight full is 6.45
> lb.
> >> A scuba tank is 80 cubic ft at 3000 psi. If you halve the pressure you
> halve
> >> the amount of air & weight. In other words, if you double the pressure
> you
> >> double the weight for a given volume.
> >> Let us know what you are trying to calculate if this doesn't help.
> >> Alan
> >>
> >>
> >>
> >> Sent from my iPad
> >>
> >>> On 4/03/2017, at 6:33 AM, hank pronk via Personal_Submersibles
> <personal_submersibles at psubs. org> wrote:
> >>>
> >>> Okay, I am stumped!  can someone give me a formula to calculate the
> weight of air at a particular psi per cubic foot.
> >>> Thank you
> >>> Hank
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> >>
> >> <Weight of gas.pdf>
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> ------------------------------
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> Message: 2
> Date: Sat, 4 Mar 2017 03:10:07 +0000 (UTC)
> From: Al Secor via Personal_Submersibles
>         <personal_submersibles at psubs.org>
> To: Personal Submersibles General Discussion
>         <personal_submersibles at psubs.org>
> Subject: Re: [PSUBS-MAILIST] formula
> Message-ID: <1475512537.1645467.1488597007679 at mail.yahoo.com>
> Content-Type: text/plain; charset="utf-8"
>
> How can the air in a 10.7 cu ft tank weigh almost 85 lbs? I could believe
> .848 lbs...best check your decimal point...?Al Secor
>
>       From: Cliff Redus via Personal_Submersibles <
> personal_submersibles at psubs.org>
>  To: Personal Submersibles General Discussion <
> personal_submersibles at psubs.org>
>  Sent: Friday, March 3, 2017 4:30 PM
>  Subject: Re: [PSUBS-MAILIST] formula
>
> 84.8 lbs assuming a 60F ambient temperature.? See attached derivation.
> Cliff
> On Fri, Mar 3, 2017 at 2:52 PM, hank pronk via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
> Alan,I need to know how much ?a 10.7 cubic foot tank will extra when
> pumped up to 1,500 psi.? And how many cubic feet of air will I have when it
> is pumped up.Hank
>
>     On Friday, March 3, 2017 12:28 PM, Alan via Personal_Submersibles
> <personal_submersibles at psubs. org> wrote:
>
>
>
> Hank,air weighs .0807 lbs per cubic foot approximately, depending on
> temperature.So if you have an 80 cubic foot scuba tank the air weight full
> is 6.45 lb.A scuba tank is 80 cubic ft at 3000 psi. If you halve the
> pressure you halvethe amount of air & weight. In other words, if you double
> the pressure youdouble the weight for a given volume.Let us know what you
> are trying to calculate if this doesn't help.Alan
>
>
> Sent from my iPad
> On 4/03/2017, at 6:33 AM, hank pronk via Personal_Submersibles
> <personal_submersibles at psubs. org> wrote:
>
>
> Okay, I am stumped! ?can someone give me a formula to calculate the weight
> of air at a particular psi per cubic foot.Thank youHank
>
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