[PSUBS-MAILIST] Personal_Submersibles Digest, Vol 50, Issue 34
River Dolfi via Personal_Submersibles
personal_submersibles at psubs.org
Wed Aug 9 22:12:14 EDT 2017
Alan,
Commercial airliners use air as the working fluid in their refrigeration
and air conditioning systems. Having a noxious chemical refrigerant leak
into an enclosed space doesn't seem too appealing to me. I can't say I've
browsed the section on air conditioning in ABS or GL, but prohibition of
onboard refrigerant wouldn't surprise me.
On Wed, Aug 9, 2017 at 10:00 PM, via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:
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> than "Re: Contents of Personal_Submersibles digest..."
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> Today's Topics:
>
> 1. Re: Personal_Submersibles Digest, Vol 50, Issue 19
> (Marc de Piolenc via Personal_Submersibles)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Thu, 10 Aug 2017 10:01:02 +0800
> From: Marc de Piolenc via Personal_Submersibles
> <personal_submersibles at psubs.org>
> To: Alan via Personal_Submersibles <personal_submersibles at psubs.org>
> Subject: Re: [PSUBS-MAILIST] Personal_Submersibles Digest, Vol 50,
> Issue 19
> Message-ID: <53ff605b-589f-255d-1a5a-f13ab724c7e2 at archivale.com>
> Content-Type: text/plain; charset=utf-8; format=flowed
>
> Right - that will work fine with a metal hull!
>
> Best,
> Marc
>
> On 8/10/2017 9:33 AM, Alan via Personal_Submersibles wrote:
> > Mark,
> > you don't need any through hulls, just glue them on to your hull with
> > a heat transfer compound. The heat will go through the hull to the
> surrounding
> > water but will also radiate laterally through the metal; hence my
> suggestion
> > to insulate around the area a bit so that the cold or heat can't come
> back in to
> > the hull.
> > Alan
> >
> > Sent from my iPad
> >
> >> On 10/08/2017, at 1:19 PM, Marc de Piolenc via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
> >>
> >> Peltier modules ARE more efficient than resistive heaters because they
> are true heat pumps - they don't supply (all) the heat that they emit on
> the hot side. In fact, they are more efficient as heaters than as coolers.
> That said, using them is a lot more difficult than using resistors, because
> they have to be connected on one side to a heat source and on the other to
> the area you want heated. In a sub, that sounds like you need another
> penetration in your pressure hull, which I would not be interested in if it
> were mine.
> >>
> >> Marc
> >>
> >>> On 8/10/2017 8:14 AM, Stephen Fordyce via Personal_Submersibles wrote:
> >>> Hi Alan,
> >>> Resistive heating being about as close as you can get to 100%, I would
> be sceptical about that. I've experimented with Peltier modules for gas
> cooling and they were quite disappointing in performance, although
> wonderfully simple in operation.
> >>> Cheers,
> >>> Steve
> >>> On 10 Aug 2017 8:33 am, "Alan via Personal_Submersibles" <
> personal_submersibles at psubs.org <mailto:personal_submersibles at psubs.org>>
> wrote:
> >>> Just did some Googling on the Peltier as a heater.
> >>> In an experiment I saw it was more efficient than resistive
> heating!
> >>> This depends to an extent on the ambient heat differential.
> >>> I would imagine you would need to attach them to the hull &
> surround
> >>> them
> >>> with an insulating material to stop the metal of the hull
> radiating back
> >>> the cold or heat produced, & force it to transfer it all to the
> water.
> >>> Another bunny trail to investigate.
> >>> Cheers Alan
> >>> Sent from my iPad
> >>> On 10/08/2017, at 9:18 AM, Alan via Personal_Submersibles
> >>> <personal_submersibles at psubs.org
> >>> <mailto:personal_submersibles at psubs.org>> wrote:
> >>>> Mike,
> >>>> the peltier is only 1/4 to 1/3 as efficient as a compressor
> >>>> system, but Cliff
> >>>> & I have very little spare room. They serve as heaters by
> >>>> reversing polarity.
> >>>> I am not sure of their efficiency as heaters compared with
> >>>> resistive coils;
> >>>> probably poor! Cliff would have to cut a hole in his fibreglass
> >>>> outer & dig back
> >>>> the syntactic foam to the pressure hull to get cooling on the
> >>>> reverse side of
> >>>> the peltier or compressor air conditioning unit. Could look sexy
> >>>> if he put some
> >>>> shark gills in it for water ingress.
> >>>> Cliff didn't have a cover on the dome, & that would let a lot of
> >>>> heat in.
> >>>> We had a wet towel on Snoopy last time at Islamorada.
> >>>> Have heard that people like Nuytco use a shore based air
> >>>> conditioner to cool
> >>>> the sub down prior to a dive; but I don't know how long that
> >>>> benefit would
> >>>> last being towed out that distance.
> >>>> Cheers Alan
> >>>>
> >>>>
> >>>> Sent from my iPad
> >>>>
> >>>> On 10/08/2017, at 6:25 AM, peaceroom via Personal_Submersibles
> >>>> <personal_submersibles at psubs.org
> >>>> <mailto:personal_submersibles at psubs.org>> wrote:
> >>>>
> >>>>> Reference,summer submarine cooling. A scaled down version of the
> >>>>> small cooler with ice and DC fan, similar to the one in Sportys,
> >>>>> aviation supplies is what a lot of planes use. Just an
> >>>>> inexpensive idea. Peltier coolers provide very little cooling
> >>>>> versus DC current used. Mike Patterson
> >>>>>
> >>>>>
> >>>>>
> >>>>> Sent from my Samsung device
> >>>>>
> >>>>>
> >>>>> -------- Original message --------
> >>>>> From: via Personal_Submersibles <personal_submersibles at psubs.org
> >>>>> <mailto:personal_submersibles at psubs.org>>
> >>>>> Date: 8/9/17 11:46 AM (GMT-05:00)
> >>>>> To: personal_submersibles at psubs.org
> >>>>> <mailto:personal_submersibles at psubs.org>
> >>>>> Subject: Personal_Submersibles Digest, Vol 50, Issue 19
> >>>>>
> >>>>> Send Personal_Submersibles mailing list submissions to
> >>>>> personal_submersibles at psubs.org
> >>>>> <mailto:personal_submersibles at psubs.org>
> >>>>>
> >>>>> To subscribe or unsubscribe via the World Wide Web, visit
> >>>>> http://www.whoweb.com/mailman/listinfo.cgi/personal_submersibles
> >>>>> <http://www.whoweb.com/mailman/listinfo.cgi/personal_
> submersibles>
> >>>>> or, via email, send a message with subject or body 'help' to
> >>>>> personal_submersibles-request at psubs.org
> >>>>> <mailto:personal_submersibles-request at psubs.org>
> >>>>>
> >>>>> You can reach the person managing the list at
> >>>>> personal_submersibles-owner at psubs.org
> >>>>> <mailto:personal_submersibles-owner at psubs.org>
> >>>>>
> >>>>> When replying, please edit your Subject line so it is more
> specific
> >>>>> than "Re: Contents of Personal_Submersibles digest..."
> >>>>>
> >>>>>
> >>>>> Today's Topics:
> >>>>>
> >>>>> 1. Re: Islamorada Trip Report...
> >>>>> (Cliff Redus via Personal_Submersibles)
> >>>>> 2. Re: Islamorada Trip Report...
> >>>>> (james cottrell via Personal_Submersibles)
> >>>>>
> >>>>>
> >>>>> ------------------------------------------------------------
> ----------
> >>>>>
> >>>>> Message: 1
> >>>>> Date: Wed, 9 Aug 2017 08:03:07 -0500
> >>>>> From: Cliff Redus via Personal_Submersibles
> >>>>> <personal_submersibles at psubs.org
> >>>>> <mailto:personal_submersibles at psubs.org>>
> >>>>> To: Personal Submersibles General Discussion
> >>>>> <personal_submersibles at psubs.org
> >>>>> <mailto:personal_submersibles at psubs.org>>
> >>>>> Subject: Re: [PSUBS-MAILIST] Islamorada Trip Report...
> >>>>> Message-ID:
> >>>>> <CAK4DN4DuhY87_6v+19RNb-6x2d9fKdaCW1uND2psz=ncVoQ9cg@
> mail.gmail.com
> >>>>> <mailto:CAK4DN4DuhY87_6v+19RNb-6x2d9fKdaCW1uND2psz=ncVo
> Q9cg at mail.gmail.com>>
> >>>>> Content-Type: text/plain; charset="utf-8"
> >>>>>
> >>>>> Footage from my sub on the trip is limited due to condensation on
> >>>>> viewport. I used Dove soap on the viewport interior prior to
> >>>>> taking off
> >>>>> but because of the humidity , temperature and duration of the
> >>>>> dive, this
> >>>>> treatment did not last and I did not have more soap on board.
> The other
> >>>>> issue is I only had two hand towels on board and these became
> >>>>> soaked with
> >>>>> sweat. As such, they were not good for cleaning the condensation
> >>>>> off after
> >>>>> the two hour tow to the dive site. Action items: Have small
> >>>>> bottle of
> >>>>> Dove soap on board and more towels for future long duration
> dives.
> >>>>>
> >>>>> Yes, I have been reading up on peltier coolers. I have quite a
> >>>>> bit of
> >>>>> battery capacity so this could work. Unfortunately, mounting on
> >>>>> hull won't
> >>>>> work for me as I have syntactic foam under the FRP shell over the
> >>>>> hull so I
> >>>>> don't have a cool surface to mount on. I do have a pair of
> >>>>> plugged off
> >>>>> ports on the bottom of the boat that would give me access to
> >>>>> cooling water
> >>>>> source if I installed a small pump on this circuit. Pushing this
> >>>>> water
> >>>>> through a small fin-fan cooler like you would see on water cooled
> >>>>> motorcycle would help with the temperature some what but not
> >>>>> humidity. At
> >>>>> Islamorada, the average water temperature at the time of the dive
> >>>>> was about
> >>>>> 87F so this would not have helped all that much. A small DC AC
> >>>>> system that
> >>>>> controlled both temperature and humidity would be better.
> >>>>>
> >>>>> On the thruster pneumatic pressure compensation, I was very happy
> >>>>> with how
> >>>>> this worked. I have all four of my thrusters connected to 1/4"
> >>>>> SS tubing
> >>>>> that is manifold into a single pressure reducing/relieving
> regulator
> >>>>> (thanks Hugh) under the cover just aft of the pilot. I was not
> >>>>> sure if a
> >>>>> single regulator would work or if I would need one for each
> >>>>> thruster but it
> >>>>> looks like one was adequate. I have had two deep dives with the
> >>>>> arrangement, one to 155 ft and one to 100 ft and have had no
> >>>>> issues with
> >>>>> water in the thrusters.
> >>>>>
> >>>>> Best Regards
> >>>>>
> >>>>> Cliff
> >>>>>
> >>>>> On Tue, Aug 8, 2017 at 10:50 PM, Alan via Personal_Submersibles <
> >>>>> personal_submersibles at psubs.org
> >>>>> <mailto:personal_submersibles at psubs.org>> wrote:
> >>>>>
> >>>>> > Thanks Cliff,
> >>>>> > I presume you shot some footage from your sub & this is the
> entr?e!
> >>>>> > Nice & clear, you must have been pretty happy down there!
> >>>>> > After you mentioned air conditioning, I looked into peltier
> >>>>> elements &
> >>>>> > air conditioning units. The peltier conditioners have only 25%
> the
> >>>>> > efficiency
> >>>>> > of a normal compression cycle system, but are really small & by
> >>>>> reversing
> >>>>> > the polarity can act as heaters. A few of those peltier
> >>>>> elements stuck to
> >>>>> > the hull
> >>>>> > with air channelled past them might be the way to go! Not sure
> what
> >>>>> > batteries you
> >>>>> > are using, but the new battery technologies on the way will
> >>>>> make energy
> >>>>> > expenditure less of an issue!
> >>>>> > Do you have all 4 motors exhausting through one regulator?
> >>>>> Couldn't see
> >>>>> > any
> >>>>> > air coming out of the motor seals so the pressure isn't
> >>>>> building up too
> >>>>> > much
> >>>>> > when exhausting.
> >>>>> > Cheers Alan
> >>>>> >
> >>>>> >
> >>>>> >
> >>>>> > Sent from my iPad
> >>>>> >
> >>>>> > On 9/08/2017, at 8:25 AM, Cliff Redus via
> Personal_Submersibles <
> >>>>> > personal_submersibles at psubs.org
> >>>>> <mailto:personal_submersibles at psubs.org>> wrote:
> >>>>> >
> >>>>> > Added two quick and dirty Youtube videos from 2017 Psubs
> >>>>> Regatta. The
> >>>>> > first is the 100 ft dive 5.3 miles offshore on Aug 3
> >>>>> > https://www.youtube.com/watch?v=sHqL49V0lMw
> >>>>> <https://www.youtube.com/watch?v=sHqL49V0lMw> and the second is
> a
> >>>>> night
> >>>>> > dive in front of Doug's house
> >>>>> https://www.youtube.com/watch?v=KDBw1ZOdKaI
> >>>>> <https://www.youtube.com/watch?v=KDBw1ZOdKaI>.
> >>>>> > Alec is working on a more comprehensive video of the Regatta.
> >>>>> >
> >>>>> > Regards
> >>>>> >
> >>>>> > Cliff
> >>>>> >
> >>>>> > On Mon, Aug 7, 2017 at 4:53 PM, Douglas Suhr via
> >>>>> Personal_Submersibles <
> >>>>> > personal_submersibles at psubs.org
> >>>>> <mailto:personal_submersibles at psubs.org>> wrote:
> >>>>> >
> >>>>> >> Greetings PSUBS group, Douglas Suhr here to share my take on
> >>>>> the 4-day
> >>>>> >> sub operation we just completed in Islamorada, FL (July 31st,
> >>>>> August
> >>>>> >> 1-3).
> >>>>> >>
> >>>>> >> Wow, what a whirlwind! So July 31st was really an arrival /
> >>>>> setup day
> >>>>> >> with August 1-3 being true operational days. Though it was
> >>>>> unfortunate
> >>>>> >> that Alec wasn't able to make it with Shackleton, we had our
> hands
> >>>>> >> full with Cliff's R-300. Without Shackleton, we also had
> >>>>> enough time
> >>>>> >> to get Snoopy set up and lowered into the canal for some basic
> >>>>> diving.
> >>>>> >>
> >>>>> >> List of Crew: Dan Lance, Steve McQueen, Cliff Redus, Rick
> Maxwell,
> >>>>> >> River Dolfi, Mike Patterson, Doug, Sarah, Douglas Suhr.
> >>>>> >>
> >>>>> >> This was my first time meeting Dan Lance, a (retired)
> >>>>> saturation diver
> >>>>> >> and commercial welder. What a pleasure to have him join us on
> this
> >>>>> >> operation. Dan is modest, but most willing to share his
> >>>>> knowledge and
> >>>>> >> extensive experience with a newbie like me. So pleased to have
> >>>>> chatted
> >>>>> >> with him in the Keys. During the towing of the R-300, Dan
> >>>>> manned the
> >>>>> >> tow line and helped with comms.
> >>>>> >>
> >>>>> >> Steve McQueen and River Dolfi did awesome jobs as our frog
> men.
> >>>>> >> Filming, attaching / detaching davit and tow lines, etc. they
> were
> >>>>> >> both in and out of the water quite a bit (especially Steve). I
> >>>>> think
> >>>>> >> River took a little jelly sting for the team. What troopers!
> >>>>> >>
> >>>>> >> Cliff and his assistant Rick are such a joy be around. Rick is
> >>>>> one of
> >>>>> >> the friendliest people you'll ever meet (and even brought a
> >>>>> gift for
> >>>>> >> the group: a watermelon, straight from Texas!). Cliff is
> always
> >>>>> >> willing to share his expertise (and sub, too) with anyone
> >>>>> who'd like
> >>>>> >> to learn more. I know that between Dan Lance and Cliff, I
> >>>>> learned more
> >>>>> >> than I can remember last week.
> >>>>> >>
> >>>>> >> Mike Patterson, mom, dad and myself were all just providing
> >>>>> whatever
> >>>>> >> kind of "troop support" we could to Cliff and the R-300.
> >>>>> >>
> >>>>> >> River, Steve and Myself got in some dive time on Snoopy in the
> >>>>> canal
> >>>>> >> (which was great), but I think the biggest accomplishment was
> >>>>> getting
> >>>>> >> the R-300 out a ways into the ocean.
> >>>>> >>
> >>>>> >> Our Boston Whaler (a 25' boat with a single 250hp Yamaha) was
> >>>>> able to
> >>>>> >> tow the R-300 out about 5 miles into the ocean (at about
> 4mph). We
> >>>>> >> were in radio communication with Cliff most of the time,
> >>>>> though we did
> >>>>> >> suffer a few intermittent losses in comms. When we got to a
> >>>>> spot about
> >>>>> >> 100 feet deep, we started to slow down a bit and at that point
> >>>>> the tow
> >>>>> >> line hook (an admittedly cheap thing) let loose(!) so we
> >>>>> decided that
> >>>>> >> we had reached our dive location. We switched from marine
> >>>>> radio to OTS
> >>>>> >> and Cliff started down. Visibility was supurb! As Cliff
> neared the
> >>>>> >> bottom at 100 ? 110 feet, he was still quite visible from the
> >>>>> Whaler!
> >>>>> >> His 18 foot long R-300 looked to be about 3 inches long, but
> >>>>> wow did
> >>>>> >> it ever stand out from the rest of the sandy bottom. Cliff
> >>>>> spent about
> >>>>> >> an hour "flying" his sub, surfacing, diving and maneuvering
> about,
> >>>>> >> testing systems and observing the ocean around him. By the
> >>>>> time Cliff
> >>>>> >> surfaced and we towed back to port Antigua, elapsed time stood
> >>>>> at 4.5
> >>>>> >> / 5 hours (estimate). Cliff said that he stayed cool by the
> water
> >>>>> >> flowing over the sub's dome hatch while in tow. Upon returning
> >>>>> I think
> >>>>> >> we were all ready to take a break, but everyone felt great
> >>>>> >> accomplishment with the mission.
> >>>>> >>
> >>>>> >> A couple of lessons I took away from the tow out: We need
> >>>>> better tow
> >>>>> >> equipment (better line, hardware and maybe a quick release).
> >>>>> Our boat
> >>>>> >> REALLY needs a GPS (still don't have one). Towing into waves
> >>>>> isn't so
> >>>>> >> much a problem, but when towing with the waves, our tow line
> >>>>> needs to
> >>>>> >> be measured so as to sustain the proper distance between tow
> >>>>> vessel
> >>>>> >> and sub (otherwise the sub and boat are constantly slacking
> >>>>> and then
> >>>>> >> jerking, stressing the tow line and making it difficult for
> >>>>> boat and
> >>>>> >> sub to track straight).
> >>>>> >>
> >>>>> >> The devotion of our crew was amazing, even in the heat and the
> >>>>> waves
> >>>>> >> everyone did their jobs. Managing even a small sub operation
> >>>>> like this
> >>>>> >> is more work / effort than meets the eye, that's for sure. At
> >>>>> dinner,
> >>>>> >> one of the main discussions revolved around a support vessel
> >>>>> that can
> >>>>> >> carry a sub or two on board, eliminating the slow, time
> >>>>> consuming tow
> >>>>> >> out to an ocean dive site. Dan Lance shared details on his
> support
> >>>>> >> vessel project, which is no doubt going to be a dream in
> terms of
> >>>>> >> logistics. Hopefully when said vessel is ready to sail, Dan
> >>>>> will lend
> >>>>> >> its services to host a diving event! ~ Douglas S.
> >>>>> >>
> >>>>> >> _______________________________________________
> >>>>> >> Personal_Submersibles mailing list
> >>>>> >> Personal_Submersibles at psubs.org
> >>>>> <mailto:Personal_Submersibles at psubs.org>
> >>>>> >>
> >>>>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
> >>>>> <http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
> >
> >>>>> >>
> >>>>> >
> >>>>> > _______________________________________________
> >>>>> > Personal_Submersibles mailing list
> >>>>> > Personal_Submersibles at psubs.org
> >>>>> <mailto:Personal_Submersibles at psubs.org>
> >>>>> > http://www.psubs.org/mailman/listinfo.cgi/personal_
> submersibles
> >>>>> <http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
> >
> >>>>> >
> >>>>> >
> >>>>> > _______________________________________________
> >>>>> > Personal_Submersibles mailing list
> >>>>> > Personal_Submersibles at psubs.org
> >>>>> <mailto:Personal_Submersibles at psubs.org>
> >>>>> > http://www.psubs.org/mailman/listinfo.cgi/personal_
> submersibles
> >>>>> <http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
> >
> >>>>> >
> >>>>> >
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> submersibles/attachments/20170809/ea2b1476/attachment-0001.html
> >>>>> <http://www.whoweb.com/pipermail/personal_
> submersibles/attachments/20170809/ea2b1476/attachment-0001.html>>
> >>>>>
> >>>>> ------------------------------
> >>>>>
> >>>>> Message: 2
> >>>>> Date: Wed, 9 Aug 2017 15:46:22 +0000 (UTC)
> >>>>> From: james cottrell via Personal_Submersibles
> >>>>> <personal_submersibles at psubs.org
> >>>>> <mailto:personal_submersibles at psubs.org>>
> >>>>> To: Personal Submersibles General Discussion
> >>>>> <personal_submersibles at psubs.org
> >>>>> <mailto:personal_submersibles at psubs.org>>
> >>>>> Subject: Re: [PSUBS-MAILIST] Islamorada Trip Report...
> >>>>> Message-ID: <1907666847.421009.1502293582178 at mail.yahoo.com
> >>>>> <mailto:1907666847.421009.1502293582178 at mail.yahoo.com>>
> >>>>> Content-Type: text/plain; charset="utf-8"
> >>>>>
> >>>>> Hi Cliff,
> >>>>> Congrats on your dives. Sub really looks great in those videos.
> >>>>> With regards to an AC solution, one low tech method would be to
> >>>>> blow air across ice in a small cooler. Water ice can be super
> >>>>> cooled with Dry Ice the night before. Dry ice is about - 100 F
> >>>>> and water ice cooled to this temperature should stay cold for
> >>>>> quite some time.
> >>>>> Greg C From: Cliff Redus via Personal_Submersibles
> >>>>> <personal_submersibles at psubs.org
> >>>>> <mailto:personal_submersibles at psubs.org>>
> >>>>> To: Personal Submersibles General Discussion
> >>>>> <personal_submersibles at psubs.org
> >>>>> <mailto:personal_submersibles at psubs.org>>
> >>>>> Sent: Wednesday, August 9, 2017 9:05 AM
> >>>>> Subject: Re: [PSUBS-MAILIST] Islamorada Trip Report...
> >>>>>
> >>>>> Footage from my sub on the trip is limited due to condensation on
> >>>>> viewport.? I used Dove soap on the viewport interior?prior to
> >>>>> taking off but because of the humidity , temperature and duration
> >>>>> of the dive, this treatment did not last and I did not have more
> >>>>> soap on board.? The other issue is I only had two hand towels on
> >>>>> board and these became soaked with sweat.? As such, they were not
> >>>>> good for cleaning the condensation off?after the two hour tow to
> >>>>> the dive site.? Action items:? Have small bottle of Dove soap on
> >>>>> board and more towels for future long duration dives.?
> >>>>> Yes, I have been reading up on peltier coolers.? I have quite a
> >>>>> bit of battery capacity so this could work.? Unfortunately,
> >>>>> mounting on hull won't work for me as I have syntactic foam under
> >>>>> the FRP shell over the hull so I don't have a cool surface to
> >>>>> mount on.? I do have a pair of plugged off ports on the bottom of
> >>>>> the boat that would give me access to cooling water source if I
> >>>>> installed a small pump on this circuit.? Pushing this water
> >>>>> through a small fin-fan cooler like you would see on?water cooled
> >>>>> motorcycle would help with the temperature some what but
> >>>>> not?humidity.? ?At Islamorada, the average water temperature at
> >>>>> the time of the dive was about 87F so this would not have helped
> >>>>> all that much.? A small DC AC system that controlled both
> >>>>> temperature and humidity would be better.
> >>>>> On the thruster pneumatic pressure compensation, I was very happy
> >>>>> with how this worked.? I have all four of my thrusters connected
> >>>>> to 1/4" SS tubing that is manifold into a single pressure
> >>>>> reducing/relieving regulator (thanks Hugh) ?under the cover just
> >>>>> aft of the pilot.?I was not sure if a single regulator would work
> >>>>> or if I would need one for each thruster but it looks like one
> >>>>> was adequate.? I have had two deep dives with the arrangement,
> >>>>> one to 155 ft and one to 100 ft and have had no issues with water
> >>>>> in the thrusters.
> >>>>> Best Regards
> >>>>> Cliff
> >>>>> On Tue, Aug 8, 2017 at 10:50 PM, Alan via Personal_Submersibles
> >>>>> <personal_submersibles at psubs.org
> >>>>> <mailto:personal_submersibles at psubs.org>> wrote:
> >>>>>
> >>>>> Thanks Cliff,I presume you shot some footage from your sub & this
> >>>>> is the entr?e!Nice & clear, you must have been pretty happy down
> >>>>> there!After you mentioned air conditioning, I looked into peltier
> >>>>> elements &air conditioning units. The peltier conditioners have
> >>>>> only 25% the efficiency?of a normal compression cycle system, but
> >>>>> are really small & by reversingthe polarity can act as heaters. A
> >>>>> few of those peltier elements stuck to the hull?with air
> >>>>> channelled past them might be the way to go! Not sure what
> >>>>> batteries youare using, but the new battery technologies on the
> >>>>> way will make energyexpenditure less of an issue!Do you have all
> >>>>> 4 motors exhausting through one regulator? Couldn't see any?air
> >>>>> coming out of the motor seals so the pressure isn't building up
> >>>>> too muchwhen exhausting.Cheers Alan
> >>>>>
> >>>>>
> >>>>> Sent from my iPad
> >>>>> On 9/08/2017, at 8:25 AM, Cliff Redus via Personal_Submersibles
> >>>>> <personal_submersibles at psubs. org> wrote:
> >>>>>
> >>>>>
> >>>>> Added two quick and dirty Youtube videos from 2017 Psubs
> >>>>> Regatta.? The first is the 100 ft dive 5.3 miles offshore on Aug
> >>>>> 3??https://www.youtube.com/ watch?v=sHqL49V0lMw?and the second
> is
> >>>>> a night dive in front of Doug's house??https://www.youtube.
> >>>>> com/watch?v=KDBw1ZOdKaI.? Alec is working on a more comprehensive
> >>>>> video of the Regatta.
> >>>>> Regards
> >>>>> Cliff
> >>>>> On Mon, Aug 7, 2017 at 4:53 PM, Douglas Suhr via
> >>>>> Personal_Submersibles <personal_submersibles at psubs. org> wrote:
> >>>>>
> >>>>> Greetings PSUBS group, Douglas Suhr here to share my take on the
> >>>>> 4-day
> >>>>> sub operation we just completed in Islamorada, FL (July 31st,
> August
> >>>>> 1-3).
> >>>>>
> >>>>> Wow, what a whirlwind! So July 31st was really an arrival /
> setup day
> >>>>> with August 1-3 being true operational days. Though it was
> >>>>> unfortunate
> >>>>> that Alec wasn't able to make it with Shackleton, we had our
> hands
> >>>>> full with Cliff's R-300. Without Shackleton, we also had enough
> time
> >>>>> to get Snoopy set up and lowered into the canal for some basic
> >>>>> diving.
> >>>>>
> >>>>> List of Crew: Dan Lance, Steve McQueen, Cliff Redus, Rick
> Maxwell,
> >>>>> River Dolfi, Mike Patterson, Doug, Sarah, Douglas Suhr.
> >>>>>
> >>>>> This was my first time meeting Dan Lance, a (retired) saturation
> >>>>> diver
> >>>>> and commercial welder. What a pleasure to have him join us on
> this
> >>>>> operation. Dan is modest, but most willing to share his
> knowledge and
> >>>>> extensive experience with a newbie like me. So pleased to have
> >>>>> chatted
> >>>>> with him in the Keys. During the towing of the R-300, Dan manned
> the
> >>>>> tow line and helped with comms.
> >>>>>
> >>>>> Steve McQueen and River Dolfi did awesome jobs as our frog men.
> >>>>> Filming, attaching / detaching davit and tow lines, etc. they
> were
> >>>>> both in and out of the water quite a bit (especially Steve). I
> think
> >>>>> River took a little jelly sting for the team. What troopers!
> >>>>>
> >>>>> Cliff and his assistant Rick are such a joy be around. Rick is
> one of
> >>>>> the friendliest people you'll ever meet (and even brought a gift
> for
> >>>>> the group: a watermelon, straight from Texas!). Cliff is always
> >>>>> willing to share his expertise (and sub, too) with anyone who'd
> like
> >>>>> to learn more. I know that between Dan Lance and Cliff, I learned
> >>>>> more
> >>>>> than I can remember last week.
> >>>>>
> >>>>> Mike Patterson, mom, dad and myself were all just providing
> whatever
> >>>>> kind of "troop support" we could to Cliff and the R-300.
> >>>>>
> >>>>> River, Steve and Myself got in some dive time on Snoopy in the
> canal
> >>>>> (which was great), but I think the biggest accomplishment was
> getting
> >>>>> the R-300 out a ways into the ocean.
> >>>>>
> >>>>> Our Boston Whaler (a 25' boat with a single 250hp Yamaha) was
> able to
> >>>>> tow the R-300 out about 5 miles into the ocean (at about 4mph).
> We
> >>>>> were in radio communication with Cliff most of the time, though
> >>>>> we did
> >>>>> suffer a few intermittent losses in comms. When we got to a spot
> >>>>> about
> >>>>> 100 feet deep, we started to slow down a bit and at that point
> >>>>> the tow
> >>>>> line hook (an admittedly cheap thing) let loose(!) so we decided
> that
> >>>>> we had reached our dive location. We switched from marine radio
> >>>>> to OTS
> >>>>> and Cliff started down. Visibility was supurb! As Cliff neared
> the
> >>>>> bottom at 100 ? 110 feet, he was still quite visible from the
> Whaler!
> >>>>> His 18 foot long R-300 looked to be about 3 inches long, but wow
> did
> >>>>> it ever stand out from the rest of the sandy bottom. Cliff spent
> >>>>> about
> >>>>> an hour "flying" his sub, surfacing, diving and maneuvering
> about,
> >>>>> testing systems and observing the ocean around him. By the time
> Cliff
> >>>>> surfaced and we towed back to port Antigua, elapsed time stood
> at 4.5
> >>>>> / 5 hours (estimate). Cliff said that he stayed cool by the water
> >>>>> flowing over the sub's dome hatch while in tow. Upon returning I
> >>>>> think
> >>>>> we were all ready to take a break, but everyone felt great
> >>>>> accomplishment with the mission.
> >>>>>
> >>>>> A couple of lessons I took away from the tow out: We need better
> tow
> >>>>> equipment (better line, hardware and maybe a quick release). Our
> boat
> >>>>> REALLY needs a GPS (still don't have one). Towing into waves
> isn't so
> >>>>> much a problem, but when towing with the waves, our tow line
> needs to
> >>>>> be measured so as to sustain the proper distance between tow
> vessel
> >>>>> and sub (otherwise the sub and boat are constantly slacking and
> then
> >>>>> jerking, stressing the tow line and making it difficult for boat
> and
> >>>>> sub to track straight).
> >>>>>
> >>>>> The devotion of our crew was amazing, even in the heat and the
> waves
> >>>>> everyone did their jobs. Managing even a small sub operation like
> >>>>> this
> >>>>> is more work / effort than meets the eye, that's for sure. At
> dinner,
> >>>>> one of the main discussions revolved around a support vessel
> that can
> >>>>> carry a sub or two on board, eliminating the slow, time
> consuming tow
> >>>>> out to an ocean dive site. Dan Lance shared details on his
> support
> >>>>> vessel project, which is no doubt going to be a dream in terms of
> >>>>> logistics. Hopefully when said vessel is ready to sail, Dan will
> lend
> >>>>> its services to host a diving event! ~ Douglas S.
> >>>>>
> >>>>> ______________________________ _________________
> >>>>> Personal_Submersibles mailing list
> >>>>> Personal_Submersibles at psubs.or
> >>>>> <mailto:Personal_Submersibles at psubs.or> g
> >>>>> http://www.psubs.org/mailman/l istinfo.cgi/personal_submersib
> les
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>> ______________________________ _________________
> >>>>> 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
> >>>>>
> >>>>>
> >>>>>
> >>>>> _______________________________________________
> >>>>> Personal_Submersibles mailing list
> >>>>> Personal_Submersibles at psubs.org
> >>>>> <mailto:Personal_Submersibles at psubs.org>
> >>>>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
> >>>>> <http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
> >
> >>>>>
> >>>>>
> >>>>>
> >>>>>
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> >>>>> *****************************************************
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> >>
> >> --
> >> Archivale catalog: http://www.archivale.com/catalog
> >> Polymath weblog: http://www.archivale.com/weblog
> >> Translations (ProZ profile): http://www.proz.com/profile/639380
> >> Translations (BeWords profile): http://www.bewords.com/Marc-dePiolenc
> >> Ducted fans: http://massflow.archivale.com/
> >> _______________________________________________
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> >> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
> >
> >
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> > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
> >
>
> --
> Archivale catalog: http://www.archivale.com/catalog
> Polymath weblog: http://www.archivale.com/weblog
> Translations (ProZ profile): http://www.proz.com/profile/639380
> Translations (BeWords profile): http://www.bewords.com/Marc-dePiolenc
> Ducted fans: http://massflow.archivale.com/
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> ------------------------------
>
> End of Personal_Submersibles Digest, Vol 50, Issue 34
> *****************************************************
>
--
-River J. Dolfi
412-997-2526
rdolfi7 at gmail.com
rwd5301 at psu.edu
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