[PSUBS-MAILIST] Emailing: DSCF4218

Thu Aug 2 01:00:20 EDT 2018

Graham,
revised calculation based on both pods having a 1/4" wall thickness.
Not taking the batteries into consideration as they stay the same.
Old pod is 61.85 lb buoyant.
New pod is 151.62 lb buoyant.
You need 89.77 lb x 2 = 179.54 lb to get back to your original 
neutral buoyancy. 
So you weren't far off with the 150 lb you added.
Hank said 166 lb so we are only 13.5lb different in our calculations.
If you can't put the lead under the sub, & you have a small section of the
new pod pipe, you could clamp a wall at either end & cast lead in to it so
that you have lead in manageable sections contoured to your battery
pod that can fit under your batteries. You could use wooden spacers
between sections of lead to adjust your subs trim.
Cheers Alan

Sent from my iPad

> On 1/08/2018, at 11:55 PM, graham bayliss via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> Hi Alan
> 
> My mistake my heads is in the clouds tanks are 72" long sorry
> 
> Graham
> 
> 
> 
> -----Original Message-----
> From: Personal_Submersibles [mailto:personal_submersibles-bounces at psubs.org]
> On Behalf Of Alan via Personal_Submersibles
> Sent: 01 August 2018 11:52
> To: Personal Submersibles General Discussion
> Subject: Re: [PSUBS-MAILIST] Emailing: DSCF4218
> 
> Hi Graham, 
> can you just confirm those dimensions before I calculate.
> Originally you said your new pods were 6ft long ( 72")
> In the latest email I am reading that you are now saying they
> are 57 & 1/4" long! Or is this the old pod length.
> Once I get the dimensions right I'll calculate your old pod
> thickness at 1/4".
> We will get there eventually.
> Cheers Alan
> 
> Sent from my iPad
> 
>>> On 1/08/2018, at 10:23 PM, graham bayliss via Personal_Submersibles
>> <personal_submersibles at psubs.org> wrote:
>> 
>> Hi Alan
>> 
>> my tanks are made of 1/4" rolled steel and 1/2" end plates they are
> 57&1/4"
>> long plus the end plates. The old pod tanks are made of sched pipe I do
> not
>> no how thick as it does not say 0n the drawings as far as I can see.
>> 
>> Cheers Graham
>> 
>> 
>> -----Original Message-----
>> From: Personal_Submersibles
> [mailto:personal_submersibles-bounces at psubs.org]
>> On Behalf Of Alan via Personal_Submersibles
>> Sent: 31 July 2018 18:44
>> To: Personal Submersibles General Discussion
>> Subject: Re: [PSUBS-MAILIST] Emailing: DSCF4218
>> 
>> Graham,
>> I did my calculations based on 3/4" wall thickness of your old pods.
>> Looking at it again, were you saying the old pod was 57&3/4" long
>> & not 57" long with a wall thickness of 3/4" as I interpreted it.
>> If so then what is the wall thickness of the old pod thanks.
>> Cheers Alan
>> 
>> Sent from my iPad
>> 
>>>> On 1/08/2018, at 12:43 AM, Alan via Personal_Submersibles
>>> <personal_submersibles at psubs.org> wrote:
>>> 
>>> Graham,
>>> that is the calculation for one pod so you'll need that extra weight
>>> on both pods.
>>> Alan
>>> 
>>> 
>>> Sent from my iPad
>>> 
>>>> On 31/07/2018, at 11:40 PM, graham bayliss via Personal_Submersibles
>> <personal_submersibles at psubs.org> wrote:
>>>> 
>>>> Hi Allan 
>>>> 
>>>> here is a picture of the sub I have attached 150 lbs of lead to the top
>> of
>>>> batteries tubes as you can see they are big.
>>>> 
>>>> Graham
>>>> 
>>>> Your message is ready to be sent with the following file or link
>>>> attachments:
>>>> 
>>>> DSCF4218
>>>> 
>>>> 
>>>> Note: To protect against computer viruses, e-mail programs may prevent
>>>> sending or receiving certain types of file attachments.  Check your
>> e-mail
>>>> security settings to determine how attachments are handled.
>>>> <DSCF4218.jpg>
>>>> _______________________________________________
>>>> Personal_Submersibles mailing list
>>>> Personal_Submersibles at psubs.org
>>>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>>> 
>>> 
>>> _______________________________________________
>>> Personal_Submersibles mailing list
>>> Personal_Submersibles at psubs.org
>>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>> 
>> 
>> _______________________________________________
>> Personal_Submersibles mailing list
>> Personal_Submersibles at psubs.org
>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
>> 
>> _______________________________________________
>> Personal_Submersibles mailing list
>> Personal_Submersibles at psubs.org
>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
> 
> 
> _______________________________________________
> Personal_Submersibles mailing list
> Personal_Submersibles at psubs.org
> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
> 
> _______________________________________________
> Personal_Submersibles mailing list
> Personal_Submersibles at psubs.org
> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles