<div dir="ltr"><div>Wow ok - interested to have peltiers explained like that. </div><div><br></div><div>Yes Alan, Melbourne is a great place - sadly no submersibles though...</div><div><br></div><div><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Aug 10, 2017 at 11:33 AM, Alan via Personal_Submersibles <span dir="ltr"><<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Mark,<br>
you don't need any through hulls, just glue them on to your hull with<br>
a heat transfer compound. The heat will go through the hull to the surrounding<br>
water but will also radiate laterally through the metal; hence my suggestion<br>
to insulate around the area a bit so that the cold or heat can't come back in to<br>
the hull.<br>
<span class="im HOEnZb">Alan<br>
<br>
Sent from my iPad<br>
<br>
</span><div class="HOEnZb"><div class="h5">> On 10/08/2017, at 1:19 PM, Marc de Piolenc via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.<wbr>org</a>> wrote:<br>
><br>
> 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.<br>
><br>
> Marc<br>
><br>
>> On 8/10/2017 8:14 AM, Stephen Fordyce via Personal_Submersibles wrote:<br>
>> Hi Alan,<br>
>> 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.<br>
>> Cheers,<br>
>> Steve<br>
>> On 10 Aug 2017 8:33 am, "Alan via Personal_Submersibles" <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.<wbr>org</a> <mailto:<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@<wbr>psubs.org</a>>> wrote:<br>
>> Just did some Googling on the Peltier as a heater.<br>
>> In an experiment I saw it was more efficient than resistive heating!<br>
>> This depends to an extent on the ambient heat differential.<br>
>> I would imagine you would need to attach them to the hull & surround<br>
>> them<br>
>> with an insulating material to stop the metal of the hull radiating back<br>
>> the cold or heat produced, & force it to transfer it all to the water.<br>
>> Another bunny trail to investigate.<br>
>> Cheers Alan<br>
>> Sent from my iPad<br>
>> On 10/08/2017, at 9:18 AM, Alan via Personal_Submersibles<br>
>> <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.<wbr>org</a><br>
>> <mailto:<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@<wbr>psubs.org</a>>> wrote:<br>
>>> Mike,<br>
>>> the peltier is only 1/4 to 1/3 as efficient as a compressor<br>
>>> system, but Cliff<br>
>>> & I have very little spare room. They serve as heaters by<br>
>>> reversing polarity.<br>
>>> I am not sure of their efficiency as heaters compared with<br>
>>> resistive coils;<br>
>>> probably poor! Cliff would have to cut a hole in his fibreglass<br>
>>> outer & dig back<br>
>>> the syntactic foam to the pressure hull to get cooling on the<br>
>>> reverse side of<br>
>>> the peltier or compressor air conditioning unit. Could look sexy<br>
>>> if he put some<br>
>>> shark gills in it for water ingress.<br>
>>> Cliff didn't have a cover on the dome, & that would let a lot of<br>
>>> heat in.<br>
>>> We had a wet towel on Snoopy last time at Islamorada.<br>
>>> Have heard that people like Nuytco use a shore based air<br>
>>> conditioner to cool<br>
>>> the sub down prior to a dive; but I don't know how long that<br>
>>> benefit would<br>
>>> last being towed out that distance.<br>
>>> Cheers Alan<br>
>>><br>
>>><br>
>>> Sent from my iPad<br>
>>><br>
>>> On 10/08/2017, at 6:25 AM, peaceroom via Personal_Submersibles<br>
>>> <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.<wbr>org</a><br>
>>> <mailto:<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@<wbr>psubs.org</a>>> wrote:<br>
>>><br>
>>>> Reference,summer submarine cooling. A scaled down version of the<br>
>>>> small cooler with ice and DC fan, similar to the one in Sportys,<br>
>>>> aviation supplies is what a lot of planes use. Just an<br>
>>>> inexpensive idea. Peltier coolers provide very little cooling<br>
>>>> versus DC current used. Mike Patterson<br>
>>>><br>
>>>><br>
>>>><br>
>>>> Sent from my Samsung device<br>
>>>><br>
>>>><br>
>>>> -------- Original message --------<br>
>>>> From: via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.<wbr>org</a><br>
>>>> <mailto:<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@<wbr>psubs.org</a>>><br>
>>>> Date: 8/9/17 11:46 AM (GMT-05:00)<br>
>>>> To: <a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.<wbr>org</a><br>
>>>> <mailto:<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@<wbr>psubs.org</a>><br>
>>>> Subject: Personal_Submersibles Digest, Vol 50, Issue 19<br>
>>>><br>
>>>> Send Personal_Submersibles mailing list submissions to<br>
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>>>><br>
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>>>> <<a href="http://www.whoweb.com/mailman/listinfo.cgi/personal_submersibles" target="_blank" rel="noreferrer">http://www.whoweb.com/<wbr>mailman/listinfo.cgi/personal_<wbr>submersibles</a>><br>
>>>> or, via email, send a message with subject or body 'help' to<br>
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>>>><br>
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>>>><br>
>>>> When replying, please edit your Subject line so it is more specific<br>
>>>> than "Re: Contents of Personal_Submersibles digest..."<br>
>>>><br>
>>>><br>
>>>> Today's Topics:<br>
>>>><br>
>>>> 1. Re: Islamorada Trip Report...<br>
>>>> (Cliff Redus via Personal_Submersibles)<br>
>>>> 2. Re: Islamorada Trip Report...<br>
>>>> (james cottrell via Personal_Submersibles)<br>
>>>><br>
>>>><br>
>>>> ------------------------------<wbr>------------------------------<wbr>----------<br>
>>>><br>
>>>> Message: 1<br>
>>>> Date: Wed, 9 Aug 2017 08:03:07 -0500<br>
>>>> From: Cliff Redus via Personal_Submersibles<br>
>>>> <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.<wbr>org</a><br>
>>>> <mailto:<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@<wbr>psubs.org</a>>><br>
>>>> To: Personal Submersibles General Discussion<br>
>>>> <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.<wbr>org</a><br>
>>>> <mailto:<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@<wbr>psubs.org</a>>><br>
>>>> Subject: Re: [PSUBS-MAILIST] Islamorada Trip Report...<br>
>>>> Message-ID:<br>
>>>> <CAK4DN4DuhY87_6v+19RNb-<wbr>6x2d9fKdaCW1uND2psz=<a href="mailto:ncVoQ9cg@mail.gmail.com">ncVoQ9cg@<wbr>mail.gmail.com</a><br>
>>>> <mailto:<a href="mailto:CAK4DN4DuhY87_6v%2B19RNb-6x2d9fKdaCW1uND2psz">CAK4DN4DuhY87_6v+<wbr>19RNb-6x2d9fKdaCW1uND2psz</a>=<a href="mailto:ncVoQ9cg@mail.gmail.com">ncVo<wbr>Q9cg@mail.gmail.com</a>>><br>
>>>> Content-Type: text/plain; charset="utf-8"<br>
>>>><br>
>>>> Footage from my sub on the trip is limited due to condensation on<br>
>>>> viewport. I used Dove soap on the viewport interior prior to<br>
>>>> taking off<br>
>>>> but because of the humidity , temperature and duration of the<br>
>>>> dive, this<br>
>>>> treatment did not last and I did not have more soap on board. The other<br>
>>>> issue is I only had two hand towels on board and these became<br>
>>>> soaked with<br>
>>>> sweat. As such, they were not good for cleaning the condensation<br>
>>>> off after<br>
>>>> the two hour tow to the dive site. Action items: Have small<br>
>>>> bottle of<br>
>>>> Dove soap on board and more towels for future long duration dives.<br>
>>>><br>
>>>> Yes, I have been reading up on peltier coolers. I have quite a<br>
>>>> bit of<br>
>>>> battery capacity so this could work. Unfortunately, mounting on<br>
>>>> hull won't<br>
>>>> work for me as I have syntactic foam under the FRP shell over the<br>
>>>> hull so I<br>
>>>> don't have a cool surface to mount on. I do have a pair of<br>
>>>> plugged off<br>
>>>> ports on the bottom of the boat that would give me access to<br>
>>>> cooling water<br>
>>>> source if I installed a small pump on this circuit. Pushing this<br>
>>>> water<br>
>>>> through a small fin-fan cooler like you would see on water cooled<br>
>>>> motorcycle would help with the temperature some what but not<br>
>>>> humidity. At<br>
>>>> Islamorada, the average water temperature at the time of the dive<br>
>>>> was about<br>
>>>> 87F so this would not have helped all that much. A small DC AC<br>
>>>> system that<br>
>>>> controlled both temperature and humidity would be better.<br>
>>>><br>
>>>> On the thruster pneumatic pressure compensation, I was very happy<br>
>>>> with how<br>
>>>> this worked. I have all four of my thrusters connected to 1/4"<br>
>>>> SS tubing<br>
>>>> that is manifold into a single pressure reducing/relieving regulator<br>
>>>> (thanks Hugh) under the cover just aft of the pilot. I was not<br>
>>>> sure if a<br>
>>>> single regulator would work or if I would need one for each<br>
>>>> thruster but it<br>
>>>> looks like one was adequate. I have had two deep dives with the<br>
>>>> arrangement, one to 155 ft and one to 100 ft and have had no<br>
>>>> issues with<br>
>>>> water in the thrusters.<br>
>>>><br>
>>>> Best Regards<br>
>>>><br>
>>>> Cliff<br>
>>>><br>
>>>> On Tue, Aug 8, 2017 at 10:50 PM, Alan via Personal_Submersibles <<br>
>>>> <a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.<wbr>org</a><br>
>>>> <mailto:<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@<wbr>psubs.org</a>>> wrote:<br>
>>>><br>
>>>> > Thanks Cliff,<br>
>>>> > I presume you shot some footage from your sub & this is the entr?e!<br>
>>>> > Nice & clear, you must have been pretty happy down there!<br>
>>>> > After you mentioned air conditioning, I looked into peltier<br>
>>>> elements &<br>
>>>> > air conditioning units. The peltier conditioners have only 25% the<br>
>>>> > efficiency<br>
>>>> > of a normal compression cycle system, but are really small & by<br>
>>>> reversing<br>
>>>> > the polarity can act as heaters. A few of those peltier<br>
>>>> elements stuck to<br>
>>>> > the hull<br>
>>>> > with air channelled past them might be the way to go! Not sure what<br>
>>>> > batteries you<br>
>>>> > are using, but the new battery technologies on the way will<br>
>>>> make energy<br>
>>>> > expenditure less of an issue!<br>
>>>> > Do you have all 4 motors exhausting through one regulator?<br>
>>>> Couldn't see<br>
>>>> > any<br>
>>>> > air coming out of the motor seals so the pressure isn't<br>
>>>> building up too<br>
>>>> > much<br>
>>>> > when exhausting.<br>
>>>> > Cheers Alan<br>
>>>> ><br>
>>>> ><br>
>>>> ><br>
>>>> > Sent from my iPad<br>
>>>> ><br>
>>>> > On 9/08/2017, at 8:25 AM, Cliff Redus via Personal_Submersibles <<br>
>>>> > <a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.<wbr>org</a><br>
>>>> <mailto:<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@<wbr>psubs.org</a>>> wrote:<br>
>>>> ><br>
>>>> > Added two quick and dirty Youtube videos from 2017 Psubs<br>
>>>> Regatta. The<br>
>>>> > first is the 100 ft dive 5.3 miles offshore on Aug 3<br>
>>>> > <a href="https://www.youtube.com/watch?v=sHqL49V0lMw" target="_blank" rel="noreferrer">https://www.youtube.com/watch?<wbr>v=sHqL49V0lMw</a><br>
>>>> <<a href="https://www.youtube.com/watch?v=sHqL49V0lMw" target="_blank" rel="noreferrer">https://www.youtube.com/<wbr>watch?v=sHqL49V0lMw</a>> and the second is a<br>
>>>> night<br>
>>>> > dive in front of Doug's house<br>
>>>> <a href="https://www.youtube.com/watch?v=KDBw1ZOdKaI" target="_blank" rel="noreferrer">https://www.youtube.com/watch?<wbr>v=KDBw1ZOdKaI</a><br>
>>>> <<a href="https://www.youtube.com/watch?v=KDBw1ZOdKaI" target="_blank" rel="noreferrer">https://www.youtube.com/<wbr>watch?v=KDBw1ZOdKaI</a>>.<br>
>>>> > Alec is working on a more comprehensive video of the Regatta.<br>
>>>> ><br>
>>>> > Regards<br>
>>>> ><br>
>>>> > Cliff<br>
>>>> ><br>
>>>> > On Mon, Aug 7, 2017 at 4:53 PM, Douglas Suhr via<br>
>>>> Personal_Submersibles <<br>
>>>> > <a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.<wbr>org</a><br>
>>>> <mailto:<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@<wbr>psubs.org</a>>> wrote:<br>
>>>> ><br>
>>>> >> Greetings PSUBS group, Douglas Suhr here to share my take on<br>
>>>> the 4-day<br>
>>>> >> sub operation we just completed in Islamorada, FL (July 31st,<br>
>>>> August<br>
>>>> >> 1-3).<br>
>>>> >><br>
>>>> >> Wow, what a whirlwind! So July 31st was really an arrival /<br>
>>>> setup day<br>
>>>> >> with August 1-3 being true operational days. Though it was<br>
>>>> unfortunate<br>
>>>> >> that Alec wasn't able to make it with Shackleton, we had our hands<br>
>>>> >> full with Cliff's R-300. Without Shackleton, we also had<br>
>>>> enough time<br>
>>>> >> to get Snoopy set up and lowered into the canal for some basic<br>
>>>> diving.<br>
>>>> >><br>
>>>> >> List of Crew: Dan Lance, Steve McQueen, Cliff Redus, Rick Maxwell,<br>
>>>> >> River Dolfi, Mike Patterson, Doug, Sarah, Douglas Suhr.<br>
>>>> >><br>
>>>> >> This was my first time meeting Dan Lance, a (retired)<br>
>>>> saturation diver<br>
>>>> >> and commercial welder. What a pleasure to have him join us on this<br>
>>>> >> operation. Dan is modest, but most willing to share his<br>
>>>> knowledge and<br>
>>>> >> extensive experience with a newbie like me. So pleased to have<br>
>>>> chatted<br>
>>>> >> with him in the Keys. During the towing of the R-300, Dan<br>
>>>> manned the<br>
>>>> >> tow line and helped with comms.<br>
>>>> >><br>
>>>> >> Steve McQueen and River Dolfi did awesome jobs as our frog men.<br>
>>>> >> Filming, attaching / detaching davit and tow lines, etc. they were<br>
>>>> >> both in and out of the water quite a bit (especially Steve). I<br>
>>>> think<br>
>>>> >> River took a little jelly sting for the team. What troopers!<br>
>>>> >><br>
>>>> >> Cliff and his assistant Rick are such a joy be around. Rick is<br>
>>>> one of<br>
>>>> >> the friendliest people you'll ever meet (and even brought a<br>
>>>> gift for<br>
>>>> >> the group: a watermelon, straight from Texas!). Cliff is always<br>
>>>> >> willing to share his expertise (and sub, too) with anyone<br>
>>>> who'd like<br>
>>>> >> to learn more. I know that between Dan Lance and Cliff, I<br>
>>>> learned more<br>
>>>> >> than I can remember last week.<br>
>>>> >><br>
>>>> >> Mike Patterson, mom, dad and myself were all just providing<br>
>>>> whatever<br>
>>>> >> kind of "troop support" we could to Cliff and the R-300.<br>
>>>> >><br>
>>>> >> River, Steve and Myself got in some dive time on Snoopy in the<br>
>>>> canal<br>
>>>> >> (which was great), but I think the biggest accomplishment was<br>
>>>> getting<br>
>>>> >> the R-300 out a ways into the ocean.<br>
>>>> >><br>
>>>> >> Our Boston Whaler (a 25' boat with a single 250hp Yamaha) was<br>
>>>> able to<br>
>>>> >> tow the R-300 out about 5 miles into the ocean (at about 4mph). We<br>
>>>> >> were in radio communication with Cliff most of the time,<br>
>>>> though we did<br>
>>>> >> suffer a few intermittent losses in comms. When we got to a<br>
>>>> spot about<br>
>>>> >> 100 feet deep, we started to slow down a bit and at that point<br>
>>>> the tow<br>
>>>> >> line hook (an admittedly cheap thing) let loose(!) so we<br>
>>>> decided that<br>
>>>> >> we had reached our dive location. We switched from marine<br>
>>>> radio to OTS<br>
>>>> >> and Cliff started down. Visibility was supurb! As Cliff neared the<br>
>>>> >> bottom at 100 ? 110 feet, he was still quite visible from the<br>
>>>> Whaler!<br>
>>>> >> His 18 foot long R-300 looked to be about 3 inches long, but<br>
>>>> wow did<br>
>>>> >> it ever stand out from the rest of the sandy bottom. Cliff<br>
>>>> spent about<br>
>>>> >> an hour "flying" his sub, surfacing, diving and maneuvering about,<br>
>>>> >> testing systems and observing the ocean around him. By the<br>
>>>> time Cliff<br>
>>>> >> surfaced and we towed back to port Antigua, elapsed time stood<br>
>>>> at 4.5<br>
>>>> >> / 5 hours (estimate). Cliff said that he stayed cool by the water<br>
>>>> >> flowing over the sub's dome hatch while in tow. Upon returning<br>
>>>> I think<br>
>>>> >> we were all ready to take a break, but everyone felt great<br>
>>>> >> accomplishment with the mission.<br>
>>>> >><br>
>>>> >> A couple of lessons I took away from the tow out: We need<br>
>>>> better tow<br>
>>>> >> equipment (better line, hardware and maybe a quick release).<br>
>>>> Our boat<br>
>>>> >> REALLY needs a GPS (still don't have one). Towing into waves<br>
>>>> isn't so<br>
>>>> >> much a problem, but when towing with the waves, our tow line<br>
>>>> needs to<br>
>>>> >> be measured so as to sustain the proper distance between tow<br>
>>>> vessel<br>
>>>> >> and sub (otherwise the sub and boat are constantly slacking<br>
>>>> and then<br>
>>>> >> jerking, stressing the tow line and making it difficult for<br>
>>>> boat and<br>
>>>> >> sub to track straight).<br>
>>>> >><br>
>>>> >> The devotion of our crew was amazing, even in the heat and the<br>
>>>> waves<br>
>>>> >> everyone did their jobs. Managing even a small sub operation<br>
>>>> like this<br>
>>>> >> is more work / effort than meets the eye, that's for sure. At<br>
>>>> dinner,<br>
>>>> >> one of the main discussions revolved around a support vessel<br>
>>>> that can<br>
>>>> >> carry a sub or two on board, eliminating the slow, time<br>
>>>> consuming tow<br>
>>>> >> out to an ocean dive site. Dan Lance shared details on his support<br>
>>>> >> vessel project, which is no doubt going to be a dream in terms of<br>
>>>> >> logistics. Hopefully when said vessel is ready to sail, Dan<br>
>>>> will lend<br>
>>>> >> its services to host a diving event! ~ Douglas S.<br>
>>>> >><br>
>>>> >> ______________________________<wbr>_________________<br>
>>>> >> Personal_Submersibles mailing list<br>
>>>> >> <a href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.<wbr>org</a><br>
>>>> <mailto:<a href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@<wbr>psubs.org</a>><br>
>>>> >><br>
>>>> <a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank" rel="noreferrer">http://www.psubs.org/mailman/<wbr>listinfo.cgi/personal_<wbr>submersibles</a><br>
>>>> <<a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank" rel="noreferrer">http://www.psubs.org/mailman/<wbr>listinfo.cgi/personal_<wbr>submersibles</a>><br>
>>>> >><br>
>>>> ><br>
>>>> > ______________________________<wbr>_________________<br>
>>>> > Personal_Submersibles mailing list<br>
>>>> > <a href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.<wbr>org</a><br>
>>>> <mailto:<a href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@<wbr>psubs.org</a>><br>
>>>> > <a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank" rel="noreferrer">http://www.psubs.org/mailman/<wbr>listinfo.cgi/personal_<wbr>submersibles</a><br>
>>>> <<a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank" rel="noreferrer">http://www.psubs.org/mailman/<wbr>listinfo.cgi/personal_<wbr>submersibles</a>><br>
>>>> ><br>
>>>> ><br>
>>>> > ______________________________<wbr>_________________<br>
>>>> > Personal_Submersibles mailing list<br>
>>>> > <a href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.<wbr>org</a><br>
>>>> <mailto:<a href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@<wbr>psubs.org</a>><br>
>>>> > <a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank" rel="noreferrer">http://www.psubs.org/mailman/<wbr>listinfo.cgi/personal_<wbr>submersibles</a><br>
>>>> <<a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank" rel="noreferrer">http://www.psubs.org/mailman/<wbr>listinfo.cgi/personal_<wbr>submersibles</a>><br>
>>>> ><br>
>>>> ><br>
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>>>><br>
>>>> ------------------------------<br>
>>>><br>
>>>> Message: 2<br>
>>>> Date: Wed, 9 Aug 2017 15:46:22 +0000 (UTC)<br>
>>>> From: james cottrell via Personal_Submersibles<br>
>>>> <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.<wbr>org</a><br>
>>>> <mailto:<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@<wbr>psubs.org</a>>><br>
>>>> To: Personal Submersibles General Discussion<br>
>>>> <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.<wbr>org</a><br>
>>>> <mailto:<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@<wbr>psubs.org</a>>><br>
>>>> Subject: Re: [PSUBS-MAILIST] Islamorada Trip Report...<br>
>>>> Message-ID: <<a href="mailto:1907666847.421009.1502293582178@mail.yahoo.com">1907666847.421009.<wbr>1502293582178@mail.yahoo.com</a><br>
>>>> <mailto:<a href="mailto:1907666847.421009.1502293582178@mail.yahoo.com">1907666847.421009.<wbr>1502293582178@mail.yahoo.com</a>>><br>
>>>> Content-Type: text/plain; charset="utf-8"<br>
>>>><br>
>>>> Hi Cliff,<br>
>>>> Congrats on your dives. Sub really looks great in those videos.<br>
>>>> With regards to an AC solution, one low tech method would be to<br>
>>>> blow air across ice in a small cooler. Water ice can be super<br>
>>>> cooled with Dry Ice the night before. Dry ice is about - 100 F<br>
>>>> and water ice cooled to this temperature should stay cold for<br>
>>>> quite some time.<br>
>>>> Greg C From: Cliff Redus via Personal_Submersibles<br>
>>>> <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.<wbr>org</a><br>
>>>> <mailto:<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@<wbr>psubs.org</a>>><br>
>>>> To: Personal Submersibles General Discussion<br>
>>>> <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.<wbr>org</a><br>
>>>> <mailto:<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@<wbr>psubs.org</a>>><br>
>>>> Sent: Wednesday, August 9, 2017 9:05 AM<br>
>>>> Subject: Re: [PSUBS-MAILIST] Islamorada Trip Report...<br>
>>>><br>
>>>> Footage from my sub on the trip is limited due to condensation on<br>
>>>> viewport.? I used Dove soap on the viewport interior?prior to<br>
>>>> taking off but because of the humidity , temperature and duration<br>
>>>> of the dive, this treatment did not last and I did not have more<br>
>>>> soap on board.? The other issue is I only had two hand towels on<br>
>>>> board and these became soaked with sweat.? As such, they were not<br>
>>>> good for cleaning the condensation off?after the two hour tow to<br>
>>>> the dive site.? Action items:? Have small bottle of Dove soap on<br>
>>>> board and more towels for future long duration dives.?<br>
>>>> Yes, I have been reading up on peltier coolers.? I have quite a<br>
>>>> bit of battery capacity so this could work.? Unfortunately,<br>
>>>> mounting on hull won't work for me as I have syntactic foam under<br>
>>>> the FRP shell over the hull so I don't have a cool surface to<br>
>>>> mount on.? I do have a pair of plugged off ports on the bottom of<br>
>>>> the boat that would give me access to cooling water source if I<br>
>>>> installed a small pump on this circuit.? Pushing this water<br>
>>>> through a small fin-fan cooler like you would see on?water cooled<br>
>>>> motorcycle would help with the temperature some what but<br>
>>>> not?humidity.? ?At Islamorada, the average water temperature at<br>
>>>> the time of the dive was about 87F so this would not have helped<br>
>>>> all that much.? A small DC AC system that controlled both<br>
>>>> temperature and humidity would be better.<br>
>>>> On the thruster pneumatic pressure compensation, I was very happy<br>
>>>> with how this worked.? I have all four of my thrusters connected<br>
>>>> to 1/4" SS tubing that is manifold into a single pressure<br>
>>>> reducing/relieving regulator (thanks Hugh) ?under the cover just<br>
>>>> aft of the pilot.?I was not sure if a single regulator would work<br>
>>>> or if I would need one for each thruster but it looks like one<br>
>>>> was adequate.? I have had two deep dives with the arrangement,<br>
>>>> one to 155 ft and one to 100 ft and have had no issues with water<br>
>>>> in the thrusters.<br>
>>>> Best Regards<br>
>>>> Cliff<br>
>>>> On Tue, Aug 8, 2017 at 10:50 PM, Alan via Personal_Submersibles<br>
>>>> <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.<wbr>org</a><br>
>>>> <mailto:<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@<wbr>psubs.org</a>>> wrote:<br>
>>>><br>
>>>> Thanks Cliff,I presume you shot some footage from your sub & this<br>
>>>> is the entr?e!Nice & clear, you must have been pretty happy down<br>
>>>> there!After you mentioned air conditioning, I looked into peltier<br>
>>>> elements &air conditioning units. The peltier conditioners have<br>
>>>> only 25% the efficiency?of a normal compression cycle system, but<br>
>>>> are really small & by reversingthe polarity can act as heaters. A<br>
>>>> few of those peltier elements stuck to the hull?with air<br>
>>>> channelled past them might be the way to go! Not sure what<br>
>>>> batteries youare using, but the new battery technologies on the<br>
>>>> way will make energyexpenditure less of an issue!Do you have all<br>
>>>> 4 motors exhausting through one regulator? Couldn't see any?air<br>
>>>> coming out of the motor seals so the pressure isn't building up<br>
>>>> too muchwhen exhausting.Cheers Alan<br>
>>>><br>
>>>><br>
>>>> Sent from my iPad<br>
>>>> On 9/08/2017, at 8:25 AM, Cliff Redus via Personal_Submersibles<br>
>>>> <personal_submersibles@psubs. org> wrote:<br>
>>>><br>
>>>><br>
>>>> Added two quick and dirty Youtube videos from 2017 Psubs<br>
>>>> Regatta.? The first is the 100 ft dive 5.3 miles offshore on Aug<br>
>>>> 3??<a href="https://www.youtube.com/" target="_blank" rel="noreferrer">https://www.youtube.com/</a> watch?v=sHqL49V0lMw?and the second is<br>
>>>> a night dive in front of Doug's house??<a href="https://www.youtube" target="_blank" rel="noreferrer">https://www.youtube</a>.<br>
>>>> com/watch?v=KDBw1ZOdKaI.? Alec is working on a more comprehensive<br>
>>>> video of the Regatta.<br>
>>>> Regards<br>
>>>> Cliff<br>
>>>> On Mon, Aug 7, 2017 at 4:53 PM, Douglas Suhr via<br>
>>>> Personal_Submersibles <personal_submersibles@psubs. org> wrote:<br>
>>>><br>
>>>> Greetings PSUBS group, Douglas Suhr here to share my take on the<br>
>>>> 4-day<br>
>>>> sub operation we just completed in Islamorada, FL (July 31st, August<br>
>>>> 1-3).<br>
>>>><br>
>>>> Wow, what a whirlwind! So July 31st was really an arrival / setup day<br>
>>>> with August 1-3 being true operational days. Though it was<br>
>>>> unfortunate<br>
>>>> that Alec wasn't able to make it with Shackleton, we had our hands<br>
>>>> full with Cliff's R-300. Without Shackleton, we also had enough time<br>
>>>> to get Snoopy set up and lowered into the canal for some basic<br>
>>>> diving.<br>
>>>><br>
>>>> List of Crew: Dan Lance, Steve McQueen, Cliff Redus, Rick Maxwell,<br>
>>>> River Dolfi, Mike Patterson, Doug, Sarah, Douglas Suhr.<br>
>>>><br>
>>>> This was my first time meeting Dan Lance, a (retired) saturation<br>
>>>> diver<br>
>>>> and commercial welder. What a pleasure to have him join us on this<br>
>>>> operation. Dan is modest, but most willing to share his knowledge and<br>
>>>> extensive experience with a newbie like me. So pleased to have<br>
>>>> chatted<br>
>>>> with him in the Keys. During the towing of the R-300, Dan manned the<br>
>>>> tow line and helped with comms.<br>
>>>><br>
>>>> Steve McQueen and River Dolfi did awesome jobs as our frog men.<br>
>>>> Filming, attaching / detaching davit and tow lines, etc. they were<br>
>>>> both in and out of the water quite a bit (especially Steve). I think<br>
>>>> River took a little jelly sting for the team. What troopers!<br>
>>>><br>
>>>> Cliff and his assistant Rick are such a joy be around. Rick is one of<br>
>>>> the friendliest people you'll ever meet (and even brought a gift for<br>
>>>> the group: a watermelon, straight from Texas!). Cliff is always<br>
>>>> willing to share his expertise (and sub, too) with anyone who'd like<br>
>>>> to learn more. I know that between Dan Lance and Cliff, I learned<br>
>>>> more<br>
>>>> than I can remember last week.<br>
>>>><br>
>>>> Mike Patterson, mom, dad and myself were all just providing whatever<br>
>>>> kind of "troop support" we could to Cliff and the R-300.<br>
>>>><br>
>>>> River, Steve and Myself got in some dive time on Snoopy in the canal<br>
>>>> (which was great), but I think the biggest accomplishment was getting<br>
>>>> the R-300 out a ways into the ocean.<br>
>>>><br>
>>>> Our Boston Whaler (a 25' boat with a single 250hp Yamaha) was able to<br>
>>>> tow the R-300 out about 5 miles into the ocean (at about 4mph). We<br>
>>>> were in radio communication with Cliff most of the time, though<br>
>>>> we did<br>
>>>> suffer a few intermittent losses in comms. When we got to a spot<br>
>>>> about<br>
>>>> 100 feet deep, we started to slow down a bit and at that point<br>
>>>> the tow<br>
>>>> line hook (an admittedly cheap thing) let loose(!) so we decided that<br>
>>>> we had reached our dive location. We switched from marine radio<br>
>>>> to OTS<br>
>>>> and Cliff started down. Visibility was supurb! As Cliff neared the<br>
>>>> bottom at 100 ? 110 feet, he was still quite visible from the Whaler!<br>
>>>> His 18 foot long R-300 looked to be about 3 inches long, but wow did<br>
>>>> it ever stand out from the rest of the sandy bottom. Cliff spent<br>
>>>> about<br>
>>>> an hour "flying" his sub, surfacing, diving and maneuvering about,<br>
>>>> testing systems and observing the ocean around him. By the time Cliff<br>
>>>> surfaced and we towed back to port Antigua, elapsed time stood at 4.5<br>
>>>> / 5 hours (estimate). Cliff said that he stayed cool by the water<br>
>>>> flowing over the sub's dome hatch while in tow. Upon returning I<br>
>>>> think<br>
>>>> we were all ready to take a break, but everyone felt great<br>
>>>> accomplishment with the mission.<br>
>>>><br>
>>>> A couple of lessons I took away from the tow out: We need better tow<br>
>>>> equipment (better line, hardware and maybe a quick release). Our boat<br>
>>>> REALLY needs a GPS (still don't have one). Towing into waves isn't so<br>
>>>> much a problem, but when towing with the waves, our tow line needs to<br>
>>>> be measured so as to sustain the proper distance between tow vessel<br>
>>>> and sub (otherwise the sub and boat are constantly slacking and then<br>
>>>> jerking, stressing the tow line and making it difficult for boat and<br>
>>>> sub to track straight).<br>
>>>><br>
>>>> The devotion of our crew was amazing, even in the heat and the waves<br>
>>>> everyone did their jobs. Managing even a small sub operation like<br>
>>>> this<br>
>>>> is more work / effort than meets the eye, that's for sure. At dinner,<br>
>>>> one of the main discussions revolved around a support vessel that can<br>
>>>> carry a sub or two on board, eliminating the slow, time consuming tow<br>
>>>> out to an ocean dive site. Dan Lance shared details on his support<br>
>>>> vessel project, which is no doubt going to be a dream in terms of<br>
>>>> logistics. Hopefully when said vessel is ready to sail, Dan will lend<br>
>>>> its services to host a diving event! ~ Douglas S.<br>
>>>><br>
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>>>><br>
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>>>><br>
>>>><br>
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