<html><head></head><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12px"><div id="yui_3_16_0_ym19_1_1488754990616_4889"><span>Hi Steve,</span></div><div id="yui_3_16_0_ym19_1_1488754990616_4889"><span id="yui_3_16_0_ym19_1_1488754990616_6624">Gamma has battery boxes in the bottom of the hull that conveniently create a water trap at the front and back of the hull. Less than a gallon of water will trip the float switch. The air supply actually comes from my external 122 cubic foot tank. The other tanks I was researching are for Elementary 3000. Unfortunately Slocan lake is very steep on the sides, so I have to test in much deeper water with the sub suspended. There are also sunken logs all over the lake, so I want to stay off the bottom. </span></div><div id="yui_3_16_0_ym19_1_1488754990616_4889"><span>Funny I was thinking </span>today, I need to buy another roll of rope so I can have a clothesline effect. The rope will loop through the lifting eye and back to the surface. In a failure, I can pull a small cable down to the sub to hook it up, or get another sub out to connect it. Actually you have an idea here, it could have a cable held up with trawl floats that can be snagged easily with a grapple hook. </div><div id="yui_3_16_0_ym19_1_1488754990616_4889">Hank</div> <div class="qtdSeparateBR"><br><br></div><div class="yahoo_quoted" style="display: block;"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 12px;"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div dir="ltr"><font size="2" face="Arial"> On Sunday, March 5, 2017 3:42 PM, Stephen Fordyce via Personal_Submersibles <personal_submersibles@psubs.org> wrote:<br></font></div> <br><br> <div class="y_msg_container"><div id="yiv1918787989"><div><div dir="ltr"><div>Hi Hank,</div><div>A pretty basic thing, but do you have enough air supply? Ie. perhaps you will need quite a bit of water leaking in to actuate the flow switches. Which needs quite a bit of buoyancy, and since you are at test depth you have a whole lot of extra ambient pressure to compensate for. Ie. your 10.7cu ft cylinder at 1500PSI will hold air to displace about 1000cu ft on the surface, but only 35cu ft at 300m depth. If that's what you're using, I think you will be ok ;).</div><div><br clear="none"></div><div>Another consideration is that for the sake of a few minutes extra before the test, it may be worth a couple of minor considerations in case the auto-surfacing method fails. (ie. find a spot in the lake where there is a flat bottom at desired depth, leave a lifting ring attached/sticking up so that a cable could later be attached to it for lifting a fully flooded sub, etc.).</div><div><br clear="none"></div><div>Cheers,</div><div>Steve</div></div><div class="yiv1918787989gmail_extra"><br clear="none"><div class="yiv1918787989gmail_quote">On Sun, Mar 5, 2017 at 10:27 PM, hank pronk via Personal_Submersibles <span dir="ltr"><<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>></span> wrote:<br clear="none"><blockquote class="yiv1918787989gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><div class="yiv1918787989yqt1919391675" id="yiv1918787989yqt90159"><div><div style="color:rgb(0,0,0);font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12px;background-color:rgb(255,255,255);"><div id="yiv1918787989m_-6175930904222641149yui_3_16_0_ym19_1_1488712461963_3257"><span>Alan,</span></div><div id="yiv1918787989m_-6175930904222641149yui_3_16_0_ym19_1_1488712461963_3256"><span>Yes I have opted to exhaust my air </span>supply into the MBT's, if I put a timer on the solenoid valves to close them, it may not lift if the sub is in a snag of some sort. I want full lifting power. The solenoid valves will be piped into the existing air feed for the MBT needle valves. I will have the needle valves set to feed the air slowly. I expect Gamma to be on the surface before the air is spent. I am attaching a 5\16 nylon rope to the sub and lowering it 5 lbs heavy, so I could haul it up if I had to. If my timer fails and the sub does not surface, I can also simply lower the sub another 50 feet or so and the outside pressure valve will send power to the solenoid valves.</div><span class="yiv1918787989HOEnZb"><font color="#888888"></font></span><div id="yiv1918787989m_-6175930904222641149yui_3_16_0_ym19_1_1488712461963_3256">Hank</div><div><div class="yiv1918787989h5"> <div class="yiv1918787989m_-6175930904222641149qtdSeparateBR"><br clear="none"><br clear="none"></div><div class="yiv1918787989m_-6175930904222641149yahoo_quoted" style="display:block;"> <div style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12px;"> <div style="font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px;"> <div dir="ltr"><font face="Arial" size="2"> On Saturday, March 4, 2017 10:49 PM, Alan via Personal_Submersibles <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs. org</a>> wrote:<br clear="none"></font></div> <br clear="none"><br clear="none"> <div class="yiv1918787989m_-6175930904222641149y_msg_container"><div id="yiv1918787989m_-6175930904222641149yiv6610315563"><div><div>Hank,</div><div id="yiv1918787989m_-6175930904222641149yiv6610315563AppleMailSignature">when the valve opens, is it going to stay open & continually send air</div><div id="yiv1918787989m_-6175930904222641149yiv6610315563AppleMailSignature">in to the ballast tanks? Also you mention an external pressure sensor</div><div id="yiv1918787989m_-6175930904222641149yiv6610315563AppleMailSignature">to avoid going too deep; are you sending it down on a rope or autonomously.</div><div id="yiv1918787989m_-6175930904222641149yiv6610315563AppleMailSignature">Alan<br clear="none"><br clear="none">Sent from my iPad</div><div class="yiv1918787989m_-6175930904222641149yiv6610315563yqt3701115084" id="yiv1918787989m_-6175930904222641149yiv6610315563yqt78836"><div><br clear="none">On 5/03/2017, at 2:49 PM, hank pronk via Personal_Submersibles <<a rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org" target="_blank" href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs. org</a>> wrote:<br clear="none"><br clear="none"></div><blockquote type="cite"><div><div style="color:rgb(0,0,0);font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:12px;background-color:rgb(255,255,255);"><div id="yiv1918787989m_-6175930904222641149yiv6610315563yui_3_16_0_ym19_1_1488677051120_5881">Hi All,</div><div dir="ltr" id="yiv1918787989m_-6175930904222641149yiv6610315563yui_3_16_0_ym19_1_1488677051120_5881">I am in the middle of building a remote surfacing system for my subs since I seem to be to cheap to go to a pressure chamber. My system operates from a dual industrial timer that powers two solenoid valves, one is redundant. The solenoid valves take regulated air to operate an air cylinder that actuates a 2,500psi ball valve. The system also incorporates two float switches, one fore and one aft in case water gets in before the one hr test is complete. There is also a internal pressure sensor in case there is an air leak, the sub will surface. There is also an external pressure sensor that will prevent the sub diving past the desired pressure test depth. Have I missed anything?</div><div dir="ltr" id="yiv1918787989m_-6175930904222641149yiv6610315563yui_3_16_0_ym19_1_1488677051120_5881">Hank</div></div></div></blockquote></div><blockquote type="cite"><div><span>______________________________ _________________</span><br clear="none"><span>Personal_Submersibles mailing list</span><br clear="none"><span><a rel="nofollow" shape="rect" ymailto="mailto:Personal_Submersibles@psubs.org" target="_blank" href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs. org</a></span><br clear="none"><span><a rel="nofollow" shape="rect" target="_blank" href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles">http://www.psubs.org/mailman/ listinfo.cgi/personal_ submersibles</a></span><br clear="none"></div></blockquote></div></div><br clear="none"><div class="yiv1918787989m_-6175930904222641149yqt3701115084" id="yiv1918787989m_-6175930904222641149yqt03726">______________________________ _________________<br clear="none">Personal_Submersibles mailing list<br clear="none"><a rel="nofollow" shape="rect" ymailto="mailto:Personal_Submersibles@psubs.org" target="_blank" href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs. org</a><br clear="none"><a rel="nofollow" shape="rect" target="_blank" href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles">http://www.psubs.org/mailman/ listinfo.cgi/personal_ submersibles</a><br clear="none"></div><br clear="none"><br clear="none"></div> </div> </div> </div></div></div></div></div></div><br clear="none">______________________________ _________________<br clear="none">
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