Re: [PSUBS-MAILIST] Simplist VB System

[david cutajar <davecutajar@djcengineering.com>]

I would think that the simplist system would mimick
the BCD we use when we SCUBA. Exactly as Dave stated,
just an external Bladder; but why not just use Air -
is it too compressible and must be adjusted more often
than oil? i.e. compresses too much as you descend???

I wonder what the advantage of oil in this situation?
Is it the ability to pump it back in and it doesn't
use up all that air???

For air, just have a momentary valve for input (into
the blader) and one for output (exhaust out of the
bladder)and make small adjustments to your bouancy as
required.

just some thoughts---$.02

David Cutajar


--- Mark <gadgetsboy@ntlworld.com> wrote:

> I'd be interested in a look myself
> 
> Mark
>   ----- Original Message ----- 
>   From: JANE PATTON 
>   To: personal_submersibles@psubs.org 
>   Sent: Wednesday, August 11, 2004 5:50 PM
>   Subject: Re: [PSUBS-MAILIST] Found this article
> and thought it may be ofinterest
> 
> 
>   Hi Dave
>   Where could I find a sketch of the oil bladder
> system you speak of?
>   Rick
>     ----- Original Message ----- 
>     From: Fly Deep 
>     To: personal_submersibles@psubs.org 
>     Sent: Wednesday, August 11, 2004 5:24 AM
>     Subject: Re: [PSUBS-MAILIST] Found this article
> and thought it may be ofinterest
> 
> 
>     Mark, the easiest and simplest VB system I've
> ran across so far is one smiler to what is used on
> the Deep Workers.  Its a simple oil tank on the
> inside and a small hand pump like a jack that can
> push the oil to the outside of the pressure vessel. 
> As the bellows increases in size out side the
> pressure vessel it displaces water and there by
> adjusting the Buoyancy....Dave
>    
> __________________________________________________
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