<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>Thanks Cliff,</div><div id="AppleMailSignature">I presume you shot some footage from your sub & this is the entrée!</div><div id="AppleMailSignature">Nice & clear, you must have been pretty happy down there!</div><div id="AppleMailSignature">After you mentioned air conditioning, I looked into peltier elements &</div><div id="AppleMailSignature">air conditioning units. The peltier conditioners have only 25% the efficiency </div><div id="AppleMailSignature">of a normal compression cycle system, but are really small & by reversing</div><div id="AppleMailSignature">the polarity can act as heaters. A few of those peltier elements stuck to the hull </div><div id="AppleMailSignature">with air channelled past them might be the way to go! Not sure what batteries you</div><div id="AppleMailSignature">are using, but the new battery technologies on the way will make energy</div><div id="AppleMailSignature">expenditure less of an issue!</div><div id="AppleMailSignature">Do you have all 4 motors exhausting through one regulator? Couldn't see any </div><div id="AppleMailSignature">air coming out of the motor seals so the pressure isn't building up too much</div><div id="AppleMailSignature">when exhausting.</div><div id="AppleMailSignature">Cheers Alan</div><div id="AppleMailSignature"><br></div><div id="AppleMailSignature"><br><br>Sent from my iPad</div><div><br>On 9/08/2017, at 8:25 AM, Cliff Redus via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br><br></div><blockquote type="cite"><div><div dir="ltr"><div>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 <span style="line-height:115%;font-family:"Calibri","sans-serif";font-size:11pt"><span><font color="#000000"> </font></span><a href="https://www.youtube.com/watch?v=sHqL49V0lMw"><font color="#0000ff">https://www.youtube.com/watch?v=sHqL49V0lMw</font></a> and the second is a night dive in front of Doug's house <span style="line-height:115%;font-family:"Calibri","sans-serif";font-size:11pt"><span><font color="#000000"> </font></span><a href="https://www.youtube.com/watch?v=KDBw1ZOdKaI"><font color="#0000ff">https://www.youtube.com/watch?v=KDBw1ZOdKaI</font></a>. Alec is working on a more comprehensive video of the Regatta.</span></span></div><div><span style="line-height:115%;font-family:"Calibri","sans-serif";font-size:11pt"><span style="line-height:115%;font-family:"Calibri","sans-serif";font-size:11pt"><br></span></span></div><div><span style="line-height:115%;font-family:"Calibri","sans-serif";font-size:11pt"><span style="line-height:115%;font-family:"Calibri","sans-serif";font-size:11pt">Regards</span></span></div><div><span style="line-height:115%;font-family:"Calibri","sans-serif";font-size:11pt"><span style="line-height:115%;font-family:"Calibri","sans-serif";font-size:11pt"><br></span></span></div><div><span style="line-height:115%;font-family:"Calibri","sans-serif";font-size:11pt"><span style="line-height:115%;font-family:"Calibri","sans-serif";font-size:11pt">Cliff</span></span></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Aug 7, 2017 at 4:53 PM, Douglas Suhr 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">Greetings PSUBS group, Douglas Suhr here to share my take on the 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 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 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 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 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 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 we did<br>
suffer a few intermittent losses in comms. When we got to a spot about<br>
100 feet deep, we started to slow down a bit and at that point 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 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 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 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 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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</blockquote></div><br></div>
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