[PSUBS-MAILIST] Gamma test dive

Sat Aug 9 08:02:46 EDT 2014

Jim,
The grooves are in a curve and when you see it you will see what I mean.  I should have filled the grooves with weld. I am reluctant to weld so close to the hatch land though. Maybe I will get some good advice at the convention how to deal with it.  I am not to worried, maybe an umbrella or eves trough :-)
Hank
On Sat, 8/9/14, Jim Todd 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: Saturday, August 9, 2014, 7:54 AM

 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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 > 
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