[PSUBS-MAILIST] Gamma test dive
James Frankland via Personal_Submersibles
personal_submersibles at psubs.org
Mon Aug 11 12:34:13 EDT 2014
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 Regards
James
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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> list
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>
> >
> >
>
> >
>
>
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> >
> >
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