[PSUBS-MAILIST] Gamma test dive

Sat Aug 9 19:11:46 EDT 2014

Hank, 

What air compressor are you using ? Does it run off your batteries ? How is your battery performance?  "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."-- Where is this air going ?

Thanks Pete

 --------------------------------------------
On Sat, 8/9/14, 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>
 Date: Saturday, August 9, 2014, 6:28 AM

 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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 >

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