[PSUBS-MAILIST] Question for the group

[JimToddPsub at aol.com]

Hi Graham,
 
If I'm following you correctly, the holes you drill to let the  water out 
will also let water re-enter and compress the bellows as you go deeper  and 
the water pressure increases.  That is, the bellows would still be  subject 
to changing volume as your depth changes.  It wouldn't function as  a VBT 
(hard tank).  However perhaps I'm not clearly understanding your  description.
 
Best regards,
Jim
 
 
In a message dated 4/12/2014 12:31:41 P.M. Central Daylight Time,  
whitestar456 at manx.net writes:

Hi   

Has anyone experimented with a different variable ballast tank I am  
thinking
of making a tube of gas pipe which is made of thick plastic inside  I plan 
to
fit a bellows air bag, this will be blown up by the air line  which blows 
the
water out of the steel ballast tank . One end of the tank  will be fixed so
as to hold the bellows in place the other end of the tank  will be drilled
with holes to allow the water to escape and the bellows to  expand. The
pressure will blow the air out of the bellows when the return  vale is
opened. This method also eliminates the fear of what the inside of  the 
steel
ballast tank is doing due to sea water corrosion.  Has  anyone any views as
to why this method will not work.

The builder of  Casper 11

Graham Bayliss

-----Original Message-----
From:  Personal_Submersibles 
[mailto:personal_submersibles-bounces at psubs.org]
On  Behalf Of Jon Wallace
Sent: 11 April 2014 14:49
To: Personal  Submersibles General Discussion
Subject: Re: [PSUBS-MAILIST] Question for  the group


A club designed sub "OSS - Open Source Submarine" was  attempted years 
ago.  It had a good start but stalled soon  afterward.  That kind of 
project is difficult to complete unless  someone with a clear vision and 
desire to lead the effort takes charge of  it.  I don't think I have it 
linked from the main site anymore but  the page still exists at 
www.psubs.org/oss if you want to look at it or  revive it.

Franks saucer sub was taken over by his daughter.  Her  intent was to 
finish it and she did write into PSUBS shortly after Frank's  death 
notifying us of that intent, however I have never heard back from  them 
again and don't know what ultimately became of the  sub.



On 4/10/2014 4:18 AM, James Frankland wrote:
> Hi  Scott\All
> I like the idea of the "club" manipulator.
>
> I  think there is scope for several club type projects.  Just off the  
> top of my head.
> Club designed sub plans.  Perhaps based  on the K250 or Emile's Eurosub 
> but kept super simple for the first  time builder.
> Manipulator arm
> Re-designed hatch for K  boats
> Single sideband UW radio
> O2 monitor
> I always  thought it would be nice for someone or group to get hold of 
> Franks  saucer sub and get it finished.  im sure he'd have liked to see 
>  it in the water.
> Anyway, just thinking aloud,
> Kind  Regards
>  James
>

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