[PSUBS-MAILIST] Gamma test dive

hank pronk via Personal_Submersibles personal_submersibles at psubs.org
Mon Aug 11 14:07:06 EDT 2014


Hi James,
In my mind the hp compressor is a must, if you want to do multiple dives all day.  The set up is very simple, I run the hp line off the compressor to my main hp tank with a hp valve.  To fill the spare tank, I have to undo the lines and switch them.  Normally I would never deplete the spare tank, so I don't mind switching the lines the odd time.  Just keep watching ebay for scuba compressors, they show up pretty often.  I have an inline hp filter that I made from a hydraulic cylinder, it has activated charcoal and tampons in it to catch the moisture.  Just in case I need to breath the air.  Also I am using the proper oil in the compressor for breathable air.  A picture will not work because the compressor is buried under cables etc in the back of the sub. The compressor is also handy for correcting an over pressure in the sub. I will be doing more dives in a few days, and plan on testing the compressor to surface.  I will surface until the hatch is above
 water with air from the hp tank, open the hatch vent valve, then use the compressor to finish surfacing.  The idea is to save battery life, the compressor puts out very well at low pressure and requires a lot less power.  It might be slow and to noisy, it is worth a try though.
Hank

 Subject: Re: [PSUBS-MAILIST] Gamma test dive
 To: "Personal Submersibles General Discussion" <personal_submersibles at psubs.org>
 Received: Monday, August 11, 2014, 12:34 PM
 
 Hi
 Hank,Can you give us any more details of this
 Cornelius compressor your using?  How its rigged up etc? 
 (pics are always good!) Ive been thinking of incorporating
 something like this.  Sounds like you've already done
 it.
 Kind RegardsJames
 
 On 10
 August 2014 01:55, hank pronk via Personal_Submersibles
 <personal_submersibles at psubs.org>
 wrote:
 
 
 
 Hi Pete,
 
 I am using a Cornelius aircraft compressor, 24V DC 3,000psi.
 It is powered off batteries.
 
 I am very pleased with the battery performance, I ran the
 entire day off one bank and the voltage only dropped
 slightly by days end.  I will charge them tomorrow and my
 charger will tell me what percent they are at.  I am sure I
 could travel several miles with no worries.
 
 
 When I want to drop the cabin pressure, I hit the compressor
 and it sends the air to the hp holding tanks.  I am talking
 .5 psi drop in the sub.
 
 Hank
 
 
 
 On Sat, 8/9/14, 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: Saturday, August 9, 2014, 7:11 PM
 
 
 
 
 
  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
 
   
 
  >   
 
    >
 
    >
 
 
 
 
 
   >
 
   
 
  >
 
 
 
 
 
  _______________________________________________
 
    >    Personal_Submersibles mailing
 
   list
 
    >    Personal_Submersibles at psubs.org
 
    >    http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
 
 
 
   >
 
   
 
    > 
 
    >
 
    >   
 
    >
 
    >
 
 
 
 
 
  >
 
    >
 
 
 
 
 
  _______________________________________________
 
    >   Personal_Submersibles mailing
 
    list
 
    >   Personal_Submersibles at psubs.org
 
    >   http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
 
   
 
  >
 
    >
 
 
 
   >
 
 
 
 
 
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    >  Personal_Submersibles mailing list
 
    >  Personal_Submersibles at psubs.org
 
    >  http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
 
    >
 
    >
 
 
 
 
 
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    > Personal_Submersibles mailing list
 
    > Personal_Submersibles at psubs.org
 
    > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
 
    >
 
    >
 
 
 
 
 
  _______________________________________________
 
    > Personal_Submersibles mailing list
 
    > Personal_Submersibles at psubs.org
 
    > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
 
   
 
 
 
 
 
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    Personal_Submersibles mailing list
 
    Personal_Submersibles at psubs.org
 
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