[PSUBS-MAILIST] Gamma test dive

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

  >   

    >

    >

   >

  >

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    > 

    >

    >   

    >

    >

  >

    >

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    >

   >

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