[PSUBS-MAILIST] Gamma test dive

[Vance Bradley via Personal_Submersibles]

Hank,
I might drop 2 inches of vacuum from deck temperature to submerged. Call it 0.5 psi. It was always that cooling effect that did it. I normally let the hull chill for 5-10 minutes then reset the zero point, as we used the barometer for an eyeball pressure indicator for CO2 build up and draw down (ran the scrubber about 15 minutes/hour).
Vance

Sent from my iPhone

> On Aug 8, 2014, at 10:15 PM, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> 
> Pete LOL I had it right, I am going to bed--------------------------------------------
> On Fri, 8/8/14, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> Subject: Re: [PSUBS-MAILIST] Gamma test dive
> To: "Personal Submersibles General Discussion" <personal_submersibles at psubs.org>
> Received: Friday, August 8, 2014, 10:13 PM
> 
> 
> Pete,
> sorry I meant 2 lb positive, can you tell I have been on the
> road for 6 hr and diving for 6 hr.  ;-)
> --------------------------------------------
> On Fri, 8/8/14, hank pronk via
> Personal_Submersibles <personal_submersibles at psubs.org>
> wrote:
> 
>  Subject: Re:
> [PSUBS-MAILIST] Gamma test dive
>  To:
> "Personal Submersibles General Discussion" <personal_submersibles at psubs.org>
>  Received: Friday, August 8, 2014, 10:01 PM
> 
> 
>  Pete,
>  I have Gamma about 2 lb negative I dump all
> the
>  air in the ballast tanks, then start
> sinking.  As I am
>  sinking, I just give a
> swirt of air, with some practice I am
>  able
> to stop and hover.  It is way easier than I though it
>  would be.  
> 
> Hank--------------------------------------------
>  On Fri, 8/8/14, Pete Niedermayr via
>  Personal_Submersibles <personal_submersibles at psubs.org>
>  wrote:
> 
>  
> Subject: Re:
>  [PSUBS-MAILIST] Gamma test
> dive
>   To:
>  "Personal
> Submersibles General Discussion" <personal_submersibles at psubs.org>
>   Received: Friday, August 8, 2014, 9:46 PM
>   
>   
>  
> Hank,
>   How you stopping and hovering. Are
> you
>  weighted to  neutral
>   buoyancy?Are you
>  riding the
> bubble? Doesn't Gamma use
> 
>  forward motion and a dive plain for depth
> control?
>   
>   Pete 
>   
>  
> -------------------------------------------
>   On Fri, 8/8/14, hank pronk via
>   Personal_Submersibles <personal_submersibles at psubs.org>
>   wrote:
>   
> 
>  
>  Subject: [PSUBS-MAILIST]
>   Gamma test dive
>    To: personal_submersibles at psubs.org
>    Date: Friday, August 8, 2014, 7:45 PM
>    
>    Today I dove Gamma
> to
>  95
>   feet in
>    Kimbasket
>  Lake (bush
> Harbour)  the
>   visibility was
>    awful.
>   
> 
> 
>  Maybe 2 feet at best.  Big mystery
> though, when I dive
>    to 95 feet, in a
> matter of 5 min the
>  pressure
>   inside drops
>    by
>  500 feet.  The pressure
>  
> stays right on
>  perfect until
>    I go deeper. 
>   My
> theory, the water is glacier fed, very
>  
> 
>   cold at depth causing the
>  temp inside the sub to drop,
> 
>   creating
>  negative pressure.  Could that
> be
>   it? 
>    Vance, did
> that happen in the north
>   sea?  
>    On a positive note,
>  I can
> stop in
>   the water Colum at any
>    depth and hover.  I
>  
> can
>  surface and stop at ten feet
>    and
>   hover.
>    Hank 
>   
> 
> 
> 
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