[PSUBS-MAILIST] Islamorada Trip Report...
Cliff Redus via Personal_Submersibles
personal_submersibles at psubs.org
Sat Aug 12 14:46:53 EDT 2017
*Brian, sorry for taking so long to respond. With being gone last week, I
have been buried.*
*Yes, ABS rules require 18” minimum freeboard and the R300 has about 8”
thus fails this test. Having said, that all of the “flyer” subs including
Sgt. Pepper, DeepFlight, DeepFlight Super Falcon, DeepFlight Challenger,
as well as small subs like the Deepworker 2000, Dual Deepworker, Exosuit
and Orcasub all would fail this freeboard test so I find myself in
excellent company. Micro subs designed to be flyers find it almost
impossible to meet this 18” freeboard constraint. To mitigate the very
real risk of flooding the hull on flyers, most designers rely on an
operating strategy that allows hatch opening only in a safe controlled
environment. As example, for the ocean side dives I did offshore
Islamorada, we only opened the hatch when we were connected to the davits.
For lake dives I have found you can get in and out of the boat if you are
careful but must still pay attention to boat traffic. *
*I accept as a reasonable tradeoff the issues associated with low freeboard
in exchange for being able to fly under the water. Some do not. *
*Best Regards*
*Cliff*
On Thu, Aug 10, 2017 at 5:35 PM, Brian Cox via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:
> Cliff, Don't you need at least 18" of freeboard or there abouts
> for ABS rules?
>
> Brian
>
>
> --- personal_submersibles at psubs.org wrote:
>
> From: Cliff Redus via Personal_Submersibles <personal_submersibles at psubs.
> org>
> To: Personal Submersibles General Discussion <personal_submersibles at psubs.
> org>
> Subject: Re: [PSUBS-MAILIST] Islamorada Trip Report...
> Date: Thu, 10 Aug 2017 14:54:25 -0500
>
> Brian due to the low freeboard, for safety reasons NOP is to never open
> the hatch at sea.
>
> Best Regards
>
> Cliff
>
> On Wed, Aug 9, 2017 at 11:59 PM, Brian Cox via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
> Cliff,
> Would it have been possible to enter the sub once you where at
> the dive site. Just tow it out there unmanned?
>
> Brian
>
> --- personal_submersibles at psubs.org wrote:
>
> From: Cliff Redus via Personal_Submersibles <personal_submersibles at psubs.
> org>
> To: Personal Submersibles General Discussion <personal_submersibles at psubs.
> org>
> Subject: Re: [PSUBS-MAILIST] Islamorada Trip Report...
> Date: Wed, 9 Aug 2017 16:03:45 -0500
>
> Lights performed great! These 5K lumen lights are very bright. I have
> four on the boat two pointing forward and two to the side. The lights
> would illuminate the water around the boat very nicely. Also can run the
> lights indefinitely out of the water. After the night dive when the boat
> was on the dock, we used the sub lights to light up all around the sub so
> we could secure it for the night. I need to look at my data to see what
> the measured current was for all four lights but I? know it was low .
> Flood orientation worked great. At the base, I had better vis at night on
> the bottom with lights than in day without. Also fish are attracted to
> light.
>
> Best Regard
>
> Cliff
>
> On Wed, Aug 9, 2017 at 3:53 PM, Pete Niedermayr via Personal_Submersibles
> <personal_submersibles at psubs.org> wrote:
>
> Cliff, How did the lights perform ?
>
> Pete
> --------------------------------------------
> On Wed, 8/9/17, irox via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
> Subject: Re: [PSUBS-MAILIST] Islamorada Trip Report...
> To: "Personal Submersibles General Discussion" <
> personal_submersibles at psubs.org>, "Personal Submersibles General
> Discussion" <personal_submersibles at psubs.org>
> Date: Wednesday, August 9, 2017, 2:10 PM
>
>
> I'm sure you're
> thinking of this as well, but dry ice, if not complete
> separated from the thing it's cooling, can sometimes
> infuse the object being cooled with CO2, which gets released
> when the object heats up/melts again. Possibly this is
> going to very minor and handled by the scrubber, but
> avoiding the unnecessary introduction of CO2 into the hull
> may be better (e.g. ensuring there is no CO2 transferred to
> the cooling material).
>
> -----Original Message-----
>
> From: Cliff Redus via Personal_Submersibles
>
>
> Sent: Aug 9, 2017 11:16 AM
>
> To: Personal Submersibles General
> Discussion
>
> Subject: Re: [PSUBS-MAILIST] Islamorada
> Trip Report...
>
>
>
> Thanks
> James. I know on the first Psub convention in Islamorada
> four years ago, Snoopy was towed out with bags of ice for
> cooling. I like the idea of using the dry ice to super
> cool the water. I will have to give this some
> thought.
> Regards
> Cliff
> On Wed, Aug 9, 2017 at
> 10:46 AM, james cottrell via Personal_Submersibles <
> personal_submersibles at psubs.org>
> wrote:
> 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>
> To: Personal
> Submersibles General Discussion <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> wrote:
> Thanks
> Cliff,I
> presume you shot some footage from your sub & this is
> the entrée!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.
>
>
>
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