Re: [PSUBS-MAILIST]

On 4/5/06, George Slaterpryce <gslaterp@hotmail.com> wrote:

Well my glaring and ungainly math error would have at least virtually
garunteed I would have over engineered the thing to a fair thee well. I was
planning on designing the hull to withstand 4500 psi external would have
been thick with many ribs but... hey!

(Never mind me just trying to cover up my complete red faced stupid math
screwup of assigning 1atm per fsw instead of 1atm per 33fsw) (yes I also
rounded psi to 15 instead of 14.7

George Slaterpryce
----- Original Message -----
From: "Cliff Redus" <dr_redus@devtex.net>
To: < personal_submersibles@psubs.org>
Sent: Wednesday, April 05, 2006 10:57 AM
Subject: Re: [PSUBS-MAILIST]

> George,
>
> Check your ambient water pressure number.  At 300 ft crush depth, the
> ambient pressure is 130 psig for fresh water not 4410 psig.  As such,
> scuba
> tanks can and do blow ballast tanks at this depth.
>
> Cliff
> ----- Original Message -----
> From: "George Slaterpryce" < gslaterp@hotmail.com>
> To: <personal_submersibles@psubs.org>
> Sent: Wednesday, April 05, 2006 8:38 AM
> Subject: Re: [PSUBS-MAILIST]
>
>
>> Archimedes is being designed for a crush depth of 300' and an operational
>> depth of 150' at crush depth I won't be able to even fill the ballast
>> because the compressed gas will be at a lower PSI than the ambient
>> preasure. (4410psi Ambient vs 3000psi in the pony... full) at operating
>> depth I'll have close to 600 psi to spare so I can blow and adjust the
>> ballast at depth.
>>
>> I kept on running into the design problem of how to (cost effectively)
>> use
>> compressed gas in a ballast system and what I came up with is using a
>> scuba tank... which automaticly limits me to 3000psi and thus a "floor"
>> of
>> 204 feet before I could no longer blow the tanks. I really wanted to
>> design something that would crush at 300m and operate at 150m but... I'm
>> gonna have to settle for what I have if I want a soft ballast.
>>
>> George Slaterpryce
>> ----- Original Message -----
>> From: "Karl Stanley" < karl@stanleysubmarines.com>
>> To: <personal_submersibles@psubs.org>
>> Sent: Wednesday, April 05, 2006 9:08 AM
>> Subject: RE: [PSUBS-MAILIST]
>>
>>
>>> Why not just make it out of foam- I took a Styrofoam wig head down 2000
>>> feet and it's still got at least 1/3 of it's volume-and floats just
>>> fine-
>>> how deep do you plan on going?  so what if the foam looses a bit - or
>>> even half it's buoyancy- it will still do what you need- and can't
>>> flood, rust or implode!
>>>
>>>
>>>
>>> I was attempting to machine the pieces for a metal "bobber" for my new
>>> soft
>>> ballast tank's water level indicator (Foam just gives at depth, so
>>> that's no
>>> good). The piece is essentially one piece 1cm in diameter 1mm thick
>>> walls
>>> and 1cm in length and another 5mm 1mm thick wall and 1cm in length tube
>>> with
>>> two 1cm diameter 1mm thick "washer" end caps with a center bore hole of
>>> 5mm.
>>>
>>> I can get the pieces machine out great, that's the easy part. I'm trying
>>> to
>>> weld them all together however and I end up with some really shitty
>>> looking
>>> welds. I've never attempted to weld something so "delicate" before. What
>>> I'm
>>> trying to make here is a preasure proof bobber and the end product
>>> should be
>>> something like a hollow bearing.
>>>
>>> All my welding is done via stick arc welding.
>>>
>>> Any suggestions?
>>>
>>>
>>>
>>> ************************************************************************
>>> ************************************************************************
>>> ************************************************************************
>>> The personal submersibles mailing list complies with the US Federal
>>> CAN-SPAM Act of 2003.  Your email address appears in our database
>>> because either you, or someone you know, requested you receive messages
>>> from our organization.
>>>
>>> If you want to be removed from this mailing list simply click on the
>>> link below or send a blank email message to:
>>> removeme-personal_submersibles@psubs.org
>>>
>>> Removal of your email address from this mailing list occurs by an
>>> automated process and should be complete within five minutes of
>>> our server receiving your request.
>>>
>>> PSUBS.ORG
>>> PO Box 311
>>> Weare, NH  03281
>>> 603-529-1100
>>> ************************************************************************
>>> ************************************************************************
>>> ************************************************************************
>>>
>>>
>>>
>>>
>>>
>>> ************************************************************************
>>> ************************************************************************
>>> ************************************************************************
>>> The personal submersibles mailing list complies with the US Federal
>>> CAN-SPAM Act of 2003.  Your email address appears in our database
>>> because either you, or someone you know, requested you receive messages
>>> from our organization.
>>>
>>> If you want to be removed from this mailing list simply click on the
>>> link below or send a blank email message to:
>>> removeme-personal_submersibles@psubs.org
>>>
>>> Removal of your email address from this mailing list occurs by an
>>> automated process and should be complete within five minutes of
>>> our server receiving your request.
>>>
>>> PSUBS.ORG
>>> PO Box 311
>>> Weare, NH  03281
>>> 603-529-1100
>>> ************************************************************************
>>> ************************************************************************
>>> ************************************************************************
>>>
>>>
>>
>>
>>
>> ************************************************************************
>> ************************************************************************
>> ************************************************************************
>> The personal submersibles mailing list complies with the US Federal
>> CAN-SPAM Act of 2003.  Your email address appears in our database
>> because either you, or someone you know, requested you receive messages
>> from our organization.
>>
>> If you want to be removed from this mailing list simply click on the
>> link below or send a blank email message to:
>> removeme-personal_submersibles@psubs.org
>>
>> Removal of your email address from this mailing list occurs by an
>> automated process and should be complete within five minutes of
>> our server receiving your request.
>>
>> PSUBS.ORG
>> PO Box 311
>> Weare, NH  03281
>> 603-529-1100
>> ************************************************************************
>> ************************************************************************
>> ************************************************************************
>>
>
>
>
>
> ************************************************************************
> ************************************************************************
> ************************************************************************
> The personal submersibles mailing list complies with the US Federal
> CAN-SPAM Act of 2003.  Your email address appears in our database
> because either you, or someone you know, requested you receive messages
> from our organization.
>
> If you want to be removed from this mailing list simply click on the
> link below or send a blank email message to:
> removeme-personal_submersibles@psubs.org
>
> Removal of your email address from this mailing list occurs by an
> automated process and should be complete within five minutes of
> our server receiving your request.
>
> PSUBS.ORG
> PO Box 311
> Weare, NH  03281
> 603-529-1100
> ************************************************************************
> ************************************************************************
> ************************************************************************
>
>

************************************************************************
************************************************************************
************************************************************************
The personal submersibles mailing list complies with the US Federal
CAN-SPAM Act of 2003.  Your email address appears in our database
because either you, or someone you know, requested you receive messages
from our organization.

If you want to be removed from this mailing list simply click on the
link below or send a blank email message to:
        removeme-personal_submersibles@psubs.org

Removal of your email address from this mailing list occurs by an
automated process and should be complete within five minutes of
our server receiving your request.

PSUBS.ORG
PO Box 311
Weare, NH  03281
603-529-1100
************************************************************************
************************************************************************
************************************************************************