[PSUBS-MAILIST] Gamma test dive

Sat Aug 9 07:54:06 EDT 2014

Hank, consider installing replaceable wear-plates where those grooves are.
Jim

Sent from my iPhone

> On Aug 9, 2014, at 6:28 AM, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> 
> Vance,
> I have to admit, you were right about how easy it is to operate.  I also find it more fun and interactive than using a VBT.  The trick seems to be, to have the weight of the sub in the sweet spot.  I just got lucky and had the weight perfect right from the start.  I mean I had it calculated just perfect :-)
> Now that I know this will happen, I will simply turn on my emergency air supply and give a little shot of air to return to my set point.  When the cabin pressure has risen in past tests, I hit the air compressor for a couple of seconds and it is corrected right away.
> The onboard air compressor was a savior at the lake.  I was able to refill both hp tanks at the dock.  I used four tanks of air.
> I had zero leakage from windows ect.  The hatch seal leaks at the very start but stops right away when I dive.  The hatch dogs need to be built up with some weld.  The dogs are new but the CT has grooves worn into the steel from being closed a million times or so.
> Hank
> 
> On Fri, 8/8/14, Vance Bradley 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, 11:20 PM
> 
> 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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