<html xmlns="http://www.w3.org/1999/xhtml" xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office"><head><!--[if gte mso 9]><xml><o:OfficeDocumentSettings><o:AllowPNG/><o:PixelsPerInch>96</o:PixelsPerInch></o:OfficeDocumentSettings></xml><![endif]--></head><body><div style="color:#000; background-color:#fff; font-family:Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px"><div id="yui_3_16_0_ym19_1_1492206106119_2891"><span>Cliff,</span></div><div id="yui_3_16_0_ym19_1_1492206106119_2892" dir="ltr"><span id="yui_3_16_0_ym19_1_1492206106119_2893">have you looked at the Vetus 6 bladed prop rated for 35-55 kg thrust.</span></div><div id="yui_3_16_0_ym19_1_1492206106119_2991" dir="ltr"><span id="yui_3_16_0_ym19_1_1492206106119_3324"><a id="yui_3_16_0_ym19_1_1492206106119_3323" href="https://www.vetus.com/set-spare-6-blade-prop-bow35-55.html">https://www.vetus.com/set-spare-6-blade-prop-bow35-55.html</a></span></div><div id="yui_3_16_0_ym19_1_1492206106119_3125" dir="ltr"><span id="yui_3_16_0_ym19_1_1492206106119_3124">The 35kg Vetus bow thruster has a 1500W motor. The rpm is 2600,</span></div><div id="yui_3_16_0_ym19_1_1492206106119_3123" dir="ltr"><span id="yui_3_16_0_ym19_1_1492206106119_3122">but I am not sure if this is no load rpm. If it is, it would be about the</span></div><div id="yui_3_16_0_ym19_1_1492206106119_3166" dir="ltr"><span>same rpm as the Minn kota motor. </span></div><div id="yui_3_16_0_ym19_1_1492206106119_3340" dir="ltr"><span id="yui_3_16_0_ym19_1_1492206106119_3355">The prop was designed by Marion & is designed for more of a static</span></div><div id="yui_3_16_0_ym19_1_1492206106119_3326" dir="ltr"><span id="yui_3_16_0_ym19_1_1492206106119_3325">load as we see in our submarines, rather than for a faster lighter boat like</span></div><div id="yui_3_16_0_ym19_1_1492206106119_3331" dir="ltr"><span id="yui_3_16_0_ym19_1_1492206106119_3330">the Minn kota prop is designed for. There could be some compromise</span></div><div id="yui_3_16_0_ym19_1_1492206106119_3328" dir="ltr"><span id="yui_3_16_0_ym19_1_1492206106119_3327">in the diameter though, as they want to get the tunnel (nozzle) as small as</span></div><div id="yui_3_16_0_ym19_1_1492206106119_3329" dir="ltr"><span id="yui_3_16_0_ym19_1_1492206106119_3372">possible to fit in to the bow of boats. The diameter could be an issue</span></div><div id="yui_3_16_0_ym19_1_1492206106119_3635" dir="ltr"><span id="yui_3_16_0_ym19_1_1492206106119_3634">as it relates to the larger diameter of the Minn kota motor which would</span></div><div id="yui_3_16_0_ym19_1_1492206106119_3624" dir="ltr"><span>impede the water flow.</span></div><div id="yui_3_16_0_ym19_1_1492206106119_3625" dir="ltr"><span id="yui_3_16_0_ym19_1_1492206106119_3950">One advantage is that it looks like it would be a lot sturdier when 3D</span></div><div id="yui_3_16_0_ym19_1_1492206106119_3626" dir="ltr"><span id="yui_3_16_0_ym19_1_1492206106119_3636">printed than the 2 or 3 blade props. ( I have a collection of them now)</span></div><div id="yui_3_16_0_ym19_1_1492206106119_3627" dir="ltr"><span id="yui_3_16_0_ym19_1_1492206106119_3637"> Even though the printed 3D props performed on the Yamaha 15hp</span></div><div id="yui_3_16_0_ym19_1_1492206106119_3628" dir="ltr"><span id="yui_3_16_0_ym19_1_1492206106119_3630">outboard, their prop design was again a lot stronger than our 2 or 3 blade </span></div><div id="yui_3_16_0_ym19_1_1492206106119_3639" dir="ltr"><span id="yui_3_16_0_ym19_1_1492206106119_3638">props. </span></div><div id="yui_3_16_0_ym19_1_1492206106119_3689" dir="ltr"><span id="yui_3_16_0_ym19_1_1492206106119_3688"> Have you looked at the propeller on Graeme Hawkes Dragon submersible?</span></div><div id="yui_3_16_0_ym19_1_1492206106119_3860" dir="ltr"><span id="yui_3_16_0_ym19_1_1492206106119_3859">I am guessing he is using high torque bike hub motors. He has designed a</span></div><div id="yui_3_16_0_ym19_1_1492206106119_3862" dir="ltr"><span id="yui_3_16_0_ym19_1_1492206106119_3861">wide central nozzle with multiple fins off that. This would make for a much</span></div><div id="yui_3_16_0_ym19_1_1492206106119_3974" dir="ltr"><span>sturdier 3D printed article & avoid wasted thrust in to the body of the 101.</span></div><div id="yui_3_16_0_ym19_1_1492206106119_3753" dir="ltr"><span id="yui_3_16_0_ym19_1_1492206106119_3754"> <a class="enhancr2_60c75ebf-0c59-38af-62b8-7ea42ee2d252" id="yui_3_16_0_ym19_1_1492206106119_3771" href="http://robbreport.com/boating-yachting/testing-new-deepflight-dragon-submersible-lake-tahoe-video">Testing the New DeepFlight Dragon Submersible in Lake Tahoe</a></span></div><div id="yui_3_16_0_ym19_1_1492206106119_3779"><br></div><div class="yahoo-link-enhancr-card ymail-preserve-class ymail-preserve-style" id="enhancr2_60c75ebf-0c59-38af-62b8-7ea42ee2d252" style='font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; max-width: 400px;' dir="ltr" contenteditable="false" data-size="medium" data-type="yenhancr" data-category="article" data-embed-url="" data-url="http://robbreport.com/boating-yachting/testing-new-deepflight-dragon-submersible-lake-tahoe-video"> <a class="yahoo-enhancr-cardlink" id="yui_3_16_0_ym19_1_1492206106119_3858" style="color: rgb(0, 0, 0) !important; 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height: 200px; position: relative;' bgcolor="#000000"> <!--[if gte mso 9]><v:rect fill="true" stroke="false" style="width:400px;height:218px;position:absolute;top:0;left:0;"><v:fill type="frame" color="#000000" src="https://s.yimg.com/vv//api/res/1.2/4VVNgmTSI5mny9QrLLUI6w--/YXBwaWQ9bWFpbDtmaT1maWxsO2g9MjAwO3c9NDAw/http://robbreport.com/sites/default/files/images/articles/2015Aug/1625126//deepflight-dragon-submersible_1a.jpg.cf.jpg"/></v:rect><![endif]--> <table class="yahoo-ignore-table" id="yui_3_16_0_ym19_1_1492206106119_3849" style="width: 100%;" border="0" cellspacing="0" cellpadding="0" valign="top"> <tbody id="yui_3_16_0_ym19_1_1492206106119_3848"><tr id="yui_3_16_0_ym19_1_1492206106119_3847"> <td id="yui_3_16_0_ym19_1_1492206106119_3846" background="https://s.yimg.com/nq/storm/assets/enhancrV2/12/overlay-tile.png" valign="top" style='background: url("https://s.yimg.com/nq/storm/assets/enhancrV2/12/overlay-tile.png") left top; height: 200px;' bgcolor="transparent"> <!--[if gte mso 9]><v:rect fill="true" stroke="false" style="width:400px;height:218px;position:absolute;top:-18px;left:0;"><v:fill type="pattern" color="#000000" src="https://s.yimg.com/nq/storm/assets/enhancrV2/12/overlay-tile.png"/><v:textbox inset="0,0,20px,0"><![endif]--> <table height="185" class="yahoo-ignore-table" id="yui_3_16_0_ym19_1_1492206106119_3845" style="width: 100%; height: 185px; min-height: 185px;"> <tbody id="yui_3_16_0_ym19_1_1492206106119_3844"><tr id="yui_3_16_0_ym19_1_1492206106119_3843"> <td class="card-richInfo2" id="yui_3_16_0_ym19_1_1492206106119_3842" style="padding: 15px 0px 0px 15px; text-align: left; vertical-align: top;"> </td> <td class="card-actions" id="yui_3_16_0_ym19_1_1492206106119_4177" style="padding: 15px 15px 0px 0px; text-align: right; vertical-align: top;"> <div class="card-share-container"></div> </td> </tr> </tbody></table> <!--[if gte mso 9]></v:textbox></v:rect><![endif]--> </td> </tr> </tbody></table> </td> </tr> <tr id="yui_3_16_0_ym19_1_1492206106119_3981"> <td id="yui_3_16_0_ym19_1_1492206106119_3980"> <table align="center" class="card-info yahoo-ignore-table" id="yui_3_16_0_ym19_1_1492206106119_3979" style="background: rgb(255, 255, 255); border-width: 1px 1px 3px; border-style: solid; border-color: rgb(224, 228, 233) rgb(224, 228, 233) rgb(0, 0, 0); border-image: none; width: 95%; margin-top: -40px; margin-right: auto; margin-left: auto; position: relative; z-index: 2; max-width: 380px;" border="0" cellspacing="0" cellpadding="0"> <tbody id="yui_3_16_0_ym19_1_1492206106119_4137"><tr id="yui_3_16_0_ym19_1_1492206106119_4136"> <td style="padding: 16px 0px 16px 12px; vertical-align: top; background-color: rgb(255, 255, 255);"> </td> <td id="yui_3_16_0_ym19_1_1492206106119_4135" style="padding: 16px 12px; width: 99%; vertical-align: middle;"> <h2 class="card-title" style='margin: 0px 0px 4px; line-height: 19px; font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; font-size: 16px;'>Testing the New DeepFlight Dragon Submersible in Lake Tahoe</h2> <div class="card-description" style="color: rgb(153, 153, 153); line-height: 15px; font-size: 11px;">The game-changing “hovering” recreational sub is so easy to use, almost anyone can operate it…</div> </td> <td style="padding: 16px 12px 16px 0px; text-align: right;"> </td> </tr> </tbody></table> </td> </tr> </tbody></table> </td> </tr> </tbody></table> </a></div><div id="yui_3_16_0_ym19_1_1492206106119_3978"><br></div><div id="yui_3_16_0_ym19_1_1492206106119_3629" dir="ltr"><span id="yui_3_16_0_ym19_1_1492206106119_4108">I am going to test the Vetus prop but have to wait about 4 weeks as I am</span></div><div id="yui_3_16_0_ym19_1_1492206106119_4109" dir="ltr"><span>having 4 new motors being made to my specs.</span></div><div id="yui_3_16_0_ym19_1_1492206106119_4107" dir="ltr"><span id="yui_3_16_0_ym19_1_1492206106119_4110">BTW the prop shaft hole diameter in the Vetus is 13.5mm; I will be having</span></div><div id="yui_3_16_0_ym19_1_1492206106119_4112" dir="ltr"><span id="yui_3_16_0_ym19_1_1492206106119_4111">to make </span><span id="yui_3_16_0_ym19_1_1492206106119_4113">up a sleeve to test it. Would be interested to know of any more</span></div><div id="yui_3_16_0_ym19_1_1492206106119_4253" dir="ltr"><span>test results.</span></div><div id="yui_3_16_0_ym19_1_1492206106119_4254" dir="ltr"><span>Cheers Alan</span></div><div id="yui_3_16_0_ym19_1_1492206106119_4182" dir="ltr"><span><br></span></div><div id="yui_3_16_0_ym19_1_1492206106119_3364" dir="ltr"><span><br></span></div><div class="qtdSeparateBR" id="yui_3_16_0_ym19_1_1492206106119_2856"><br><br></div><div class="yahoo_quoted" id="yui_3_16_0_ym19_1_1492206106119_2864" style="display: block;"> <div id="yui_3_16_0_ym19_1_1492206106119_2863" style="font-family: Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div id="yui_3_16_0_ym19_1_1492206106119_2862" style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div id="yui_3_16_0_ym19_1_1492206106119_2861" dir="ltr"> <font id="yui_3_16_0_ym19_1_1492206106119_2872" face="Arial" size="2"> <hr size="1" id="yui_3_16_0_ym19_1_1492206106119_2993"> <b><span style="font-weight: bold;">From:</span></b> Cliff Redus via Personal_Submersibles <personal_submersibles@psubs.org><br> <b><span style="font-weight: bold;">To:</span></b> Personal Submersibles General Discussion <personal_submersibles@psubs.org> <br> <b><span style="font-weight: bold;">Sent:</span></b> Saturday, April 15, 2017 1:23 AM<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: [PSUBS-MAILIST] Alec's test<br> </font> </div> <div class="y_msg_container" id="yui_3_16_0_ym19_1_1492206106119_2905"><br><div id="yiv1112115268"><div><div dir="ltr"><div>Alec, thanks for posting the trip report on Shackleton. I was interested in the testing you did on your printed Kort nozzle. From the testing we did on the MK-101 variable pitch prop project, we found a pretty large variation in performance of different props with and without the nozzle for these MD-101 motors. Just because you have a nozzle it does not guarantee better thrust. As example, if you look at test results below, the 4" pitch open water prop that ships with the MK-101, the MKP-33 with out the nozzle generated 82 lbs of bollard thrust but when installed in the nozzle, the thrust drops off to 71 lbs. This is not always the case. Using the 5" after market Kipawa 80/01 prop when tested without the nozzle, the thrust was 80 lbs but with the nozzle it jumped to 90 lbs. To me one of the big issues seems to be the tip shape. To get good performance you have to minimize leakage of pressure from the high pressure side of the blade to the low pressure side around the tip. This is why all props on thrusters with nozzles have tips that are square off rather than rounded with a small gap between the blade and the nozzle. I don't know the prop you were using but my guess is that it was an open water prop with rounded tip. Can you send a picture from the stern showing the prop in your printed nozzle?</div><div><br clear="none"></div><div><img width="561" height="419" alt="Inline image 1" src="cid:jOMvCzvrGFiUrjfKHj0e" data-id="70f5aa7a-46bd-1060-fe75-6675cad4b8f1"></div><div><img width="561" height="418" alt="Inline image 2" src="cid:mYrbwdVa66oQoILkNC7e" data-id="f58c37ec-df8b-2102-6a86-55bdbef789d0"></div></div><div class="yiv1112115268gmail_extra"><br clear="none"><div class="yiv1112115268yqt4480536701" id="yiv1112115268yqtfd01092"><div class="yiv1112115268gmail_quote">On Fri, Apr 14, 2017 at 7:41 AM, Alec Smyth via Personal_Submersibles <span dir="ltr"><<a href="mailto:personal_submersibles@psubs.org" target="_blank" rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>></span> wrote:<br clear="none"><blockquote class="yiv1112115268gmail_quote" style="margin: 0px 0px 0px 0.8ex; padding-left: 1ex; border-left-color: rgb(204, 204, 204); border-left-width: 1px; border-left-style: solid;"><div dir="ltr">Oh I'm not celebrating yet - the sub hasn't made any dives! I was just puttering around on the surface and only submerged in shallow water where there were still six inches of the CT showing when I reached the bottom. It might have been possible to dive, but I'd rather try it once the water-blocking issue in the plumbing is addressed. </div><div class="yiv1112115268gmail_extra"><br clear="none"><div class="yiv1112115268gmail_quote">On Thu, Apr 13, 2017 at 11:24 PM, Alan James via Personal_Submersibles <span dir="ltr"><<a href="mailto:personal_submersibles@psubs.org" target="_blank" rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs. org</a>></span> wrote:<br clear="none"><blockquote class="yiv1112115268gmail_quote" style="margin: 0px 0px 0px 0.8ex; padding-left: 1ex; border-left-color: rgb(204, 204, 204); border-left-width: 1px; border-left-style: solid;"><div><div style="color: rgb(0, 0, 0); font-family: Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px; background-color: rgb(255, 255, 255);"><div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yui_3_16_0_ym19_1_1492137996124_3209"><span id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yui_3_16_0_ym19_1_1492137996124_3208">Congratulations Alec,</span></div><div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yui_3_16_0_ym19_1_1492137996124_3268"><span id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yui_3_16_0_ym19_1_1492137996124_3267">How deep did you dive? Are you busy selecting a sound track for the video?</span></div><div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yui_3_16_0_ym19_1_1492137996124_3264"><span id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yui_3_16_0_ym19_1_1492137996124_3263">I am wondering if you were turning toward the tunnel thruster because thrust can</span></div><div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yui_3_16_0_ym19_1_1492137996124_3266"><span id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yui_3_16_0_ym19_1_1492137996124_3265">push out to the side without the restraint of a kort nozzle! </span></div><div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yui_3_16_0_ym19_1_1492137996124_3290"><span id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yui_3_16_0_ym19_1_1492137996124_3330"> I have done a preliminary drawing for a solenoid operated ballast valve</span></div><div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yui_3_16_0_ym19_1_1492137996124_3319" dir="ltr"><span id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yui_3_16_0_ym19_1_1492137996124_3337">based on the top hat design that Vance gave out in Islamorada. With it being</span></div><div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yui_3_16_0_ym19_1_1492137996124_3393" dir="ltr"><span id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yui_3_16_0_ym19_1_1492137996124_3421">electrically operated you could control it with a gyro sensor using a board</span></div><div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yui_3_16_0_ym19_1_1492137996124_3446" dir="ltr"><span id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yui_3_16_0_ym19_1_1492137996124_3445">that controls quad copters. That way at the flick of a switch you would</span></div><div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yui_3_16_0_ym19_1_1492137996124_3448" dir="ltr"><span id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yui_3_16_0_ym19_1_1492137996124_3447">descend horizontally. (in theory).</span></div><div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yui_3_16_0_ym19_1_1492137996124_3496" dir="ltr"><span id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yui_3_16_0_ym19_1_1492137996124_3495">Did you use the new lights?</span></div><div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yui_3_16_0_ym19_1_1492137996124_3497" dir="ltr"><span id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yui_3_16_0_ym19_1_1492137996124_3504">Cheers Alan</span></div><div class="yiv1112115268m_-7070854052861122459m_-3188659661789124660qtdSeparateBR" id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yui_3_16_0_ym19_1_1492137996124_3179"><br clear="none"><br clear="none"></div><div class="yiv1112115268m_-7070854052861122459m_-3188659661789124660yahoo_quoted" id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yui_3_16_0_ym19_1_1492137996124_3279" style="display: block;"> <div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yui_3_16_0_ym19_1_1492137996124_3278" style="font-family: Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yui_3_16_0_ym19_1_1492137996124_3277" style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yui_3_16_0_ym19_1_1492137996124_3276" dir="ltr"> <font id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yui_3_16_0_ym19_1_1492137996124_3275" face="Arial" size="2"> </font><hr size="1" id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yui_3_16_0_ym19_1_1492137996124_3283"> <b><span style="font-weight: bold;">From:</span></b> james cottrell via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank" rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.o rg</a>><span><br clear="none"> <b><span style="font-weight: bold;">To:</span></b> Personal Submersibles General Discussion <<a href="mailto:personal_submersibles@psubs.org" target="_blank" rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.o rg</a>> <br clear="none"> </span><b><span style="font-weight: bold;">Sent:</span></b> Friday, April 14, 2017 2:58 PM<div><div class="yiv1112115268m_-7070854052861122459h5"><br clear="none"> <b><span style="font-weight: bold;">Subject:</span></b> Re: [PSUBS-MAILIST] Alec's test<br clear="none"> </div></div> </div><div><div class="yiv1112115268m_-7070854052861122459h5"> <div class="yiv1112115268m_-7070854052861122459m_-3188659661789124660y_msg_container" id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yui_3_16_0_ym19_1_1492137996124_3282"><br clear="none"><div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892"><div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yui_3_16_0_ym19_1_1492137996124_3281"><div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yui_3_16_0_ym19_1_1492137996124_3280" style="color: rgb(0, 0, 0); font-family: verdana, helvetica, sans-serif; font-size: 13px; background-color: rgb(255, 255, 255);"><div><span></span></div><div class="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892qtdSeparateBR" id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892yui_3_16_0_ym19_1_1492138065311_3439">That sounds great Alec! Congrats on a great build. I'm sure you'll iron out the minor venting issue.</div><div class="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892qtdSeparateBR" id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892yui_3_16_0_ym19_1_1492138065311_3441"><br clear="none"></div><div class="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892qtdSeparateBR" id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892yui_3_16_0_ym19_1_1492138065311_3444" dir="ltr">Greg<br clear="none"><br clear="none"></div><div class="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892yahoo_quoted" id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892yui_3_16_0_ym19_1_1492138065311_3455" style="display: block;"> <div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892yui_3_16_0_ym19_1_1492138065311_3454" style="font-family: verdana, helvetica, sans-serif; font-size: 13px;"> <div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892yui_3_16_0_ym19_1_1492138065311_3453" style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yui_3_16_0_ym19_1_1492137996124_3291" dir="ltr"> <font face="Arial" size="2"> </font><div class="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892yqt0158267042" id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892yqtfd14230"><hr size="1"> <b><span style="font-weight: bold;">From:</span></b> Alec Smyth via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank" rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.o rg</a>><br clear="none"> <b><span style="font-weight: bold;">To:</span></b> Personal Submersibles General Discussion <<a href="mailto:personal_submersibles@psubs.org" target="_blank" rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.o rg</a>> <br clear="none"> <b><span style="font-weight: bold;">Sent:</span></b> Thursday, April 13, 2017 10:47 PM<br clear="none"> <b><span style="font-weight: bold;">Subject:</span></b> Re: [PSUBS-MAILIST] Alec's test<br clear="none"> </div></div><div class="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892yqt0158267042" id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892yqtfd28652"> <div class="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892y_msg_container" id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892yui_3_16_0_ym19_1_1492138065311_3452"><br clear="none"><div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892"><div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892yui_3_16_0_ym19_1_1492138065311_3451"><div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892yui_3_16_0_ym19_1_1492138065311_3450" dir="ltr">Hi Greg,<div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yui_3_16_0_ym19_1_1492137996124_3292"><br clear="none"></div><div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yui_3_16_0_ym19_1_1492137996124_3416">Well here's how it went - much better but there's one more issue to resolve. </div><div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892yui_3_16_0_ym19_1_1492138065311_3449"><br clear="none"></div><div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yui_3_16_0_ym19_1_1492137996124_3293">The change to a raft configuration for the MBTs has solved the surfaced stability issue. It was great, I could walk around to any edge of the deck without excessive list. The longitudinal trim was slightly down by the stern when empty, and trimmed out to perfectly level when a person was lying in the front half of the boat (stability was calculated for the boat with crew). She floats in water only just over waist deep, 38 inches, and the freeboard is 24 inches. The thrusters and their controls worked beautifully, and the "tank drive" is really, really intuitive. </div><div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yui_3_16_0_ym19_1_1492137996124_3294"><br clear="none"></div><div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892yui_3_16_0_ym19_1_1492138065311_3456">After launching I drove around on the surface a bit. I didn't get a measurement of speed but would say while slower than a K350 she's decidedly faster than Snoopy. I tested a prototype kort nozzle by mounting it on one of the stern thrusters only and then giving both thrusters equal throttle, to see which way the boat tracked. Surprise, the un-shrouded original prop was more efficient because the boat would turn toward the side with the kort. So I'm just going to put on standard prop guards, at least for now.</div><div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892yui_3_16_0_ym19_1_1492138065311_3457"><br clear="none"></div><div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892yui_3_16_0_ym19_1_1492138065311_3458">Part of the surface running I did lying down and looking through the bow dome. The view is ridiculously good! From the CT it wasn't bad either, and I was surprised how the flat domes made objects appear closer, something I didn't recall from the flat bow dome in Snoopy. In this one, the leading edge of the deck as seen through the CT viewports seemed only a foot away. The dome is something else entirely, and optically seemed to have the opposite effect of making things appear further away, but maybe that was just in contrast to the CT viewports I'd been looking though moments before.</div><div><br clear="none"></div><div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892yui_3_16_0_ym19_1_1492138065311_3459">And so here is the new problem. The raft MBT consists of a collection of aluminum tanks, each of which has SS tubing coming out the top and gathering at a manifold, which is piped to the ball valves on the CT. As some of the tanks are off on the edges of the raft, some of the tubing runs side to side at an angle (up to 90 degrees) to the centerline. When you start flooding MBT, invariably one side will begin to fill slightly faster than the other. The side that is flooding faster will be lower in the water, and the effect of this list on the opposite side is that the tube connecting tanks to their manifold is now sloping downhill instead of up. This blocks the high side from letting out air, which exacerbates the initial list. It's really obvious when you see it, I should have thought of this effect. But luckily the solution is obvious too. There are two ways to fix it; remotely actuated valves right on the tanks, or new manifolds that are high enough to keep all tubing going uphill at reasonable angles of list. My initial impression is that the simpler of the two methods is to modify the plumbing. </div><div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yui_3_16_0_ym19_1_1492137996124_3464"><br clear="none"></div><div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yui_3_16_0_ym19_1_1492137996124_3461"><br clear="none"></div><div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yui_3_16_0_ym19_1_1492137996124_3462">Best,</div><div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yui_3_16_0_ym19_1_1492137996124_3463"><br clear="none">Alec</div><div><br clear="none"></div><div><br clear="none"></div><div><br clear="none"></div><div><br clear="none"></div></div><div class="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892gmail_extra"><br clear="none"><div class="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892gmail_quote">On Thu, Apr 13, 2017 at 10:10 PM, james cottrell via Personal_Submersibles <span dir="ltr"><<a href="mailto:personal_submersibles@psubs.org" target="_blank" rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.o rg</a>></span> wrote:<br clear="none"><blockquote class="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892gmail_quote" style="margin: 0px 0px 0px 0.8ex; padding-left: 1ex; border-left-color: rgb(204, 204, 204); border-left-width: 1px; border-left-style: solid;"><div class="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892yqt0994340440" id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892yqt52847"><div><div style="color: rgb(0, 0, 0); font-family: verdana, helvetica, sans-serif; font-size: 13px; background-color: rgb(255, 255, 255);"><div><span></span></div><div class="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892m_-2889796519550700373qtdSeparateBR" id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892m_-2889796519550700373yui_3_16_0_ym19_1_1492135216136_10055">Did anyone hear how Alec's test went today?<br clear="none"><br clear="none"></div><div class="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892m_-2889796519550700373yahoo_quoted" id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892m_-2889796519550700373yui_3_16_0_ym19_1_1492135216136_10076" style="display: block;"> <div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892m_-2889796519550700373yui_3_16_0_ym19_1_1492135216136_10075" style="font-family: verdana, helvetica, sans-serif; font-size: 13px;"> <div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892m_-2889796519550700373yui_3_16_0_ym19_1_1492135216136_10074" style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892m_-2889796519550700373yui_3_16_0_ym19_1_1492135216136_10073" dir="ltr"> <font id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892m_-2889796519550700373yui_3_16_0_ym19_1_1492135216136_10072" face="Arial" size="2"> </font><hr size="1"> <b><span style="font-weight: bold;">From:</span></b> Alan via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank" rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs. org</a>><br clear="none"> <b><span style="font-weight: bold;">To:</span></b> Personal Submersibles General Discussion <<a href="mailto:personal_submersibles@psubs.org" target="_blank" rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs. org</a>> <br clear="none"> <b><span style="font-weight: bold;">Sent:</span></b> Thursday, April 13, 2017 9:34 PM<br clear="none"> <b><span style="font-weight: bold;">Subject:</span></b> Re: [PSUBS-MAILIST] Oil Compensator<br clear="none"> </div> <div class="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892m_-2889796519550700373y_msg_container" id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892m_-2889796519550700373yui_3_16_0_ym19_1_1492135216136_10078"><br clear="none"><div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892m_-2889796519550700373yiv7198155306"><div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892m_-2889796519550700373yui_3_16_0_ym19_1_1492135216136_10077"><div>Jon,</div><div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892m_-2889796519550700373yiv7198155306AppleMailSignature">an easy solution is to take the thruster, or that section of the thruster</div><div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892m_-2889796519550700373yiv7198155306AppleMailSignature">in to a plumbing merchant or hydraulic repair shop & ask for something </div><div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892m_-2889796519550700373yiv7198155306AppleMailSignature">compatible with a barbed hose fitting. Sometimes a metric option will</div><div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892m_-2889796519550700373yiv7198155306AppleMailSignature">fit in an imperial thread, & so they may know of not so obvious solutions.</div><div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892m_-2889796519550700373yiv7198155306AppleMailSignature">Alan<br clear="none"><br clear="none">Sent from my iPad</div><div class="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892m_-2889796519550700373yiv7198155306yqt0765085698" id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892m_-2889796519550700373yiv7198155306yqt69176"><div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892m_-2889796519550700373yui_3_16_0_ym19_1_1492135216136_10079"><br clear="none">On 14/04/2017, at 12:53 PM, Jon Wallace via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank" rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs. org</a>> wrote:<br clear="none"><br clear="none"></div><blockquote id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892m_-2889796519550700373yui_3_16_0_ym19_1_1492135216136_10082" type="cite"><div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892m_-2889796519550700373yui_3_16_0_ym19_1_1492135216136_10081"><div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892m_-2889796519550700373yui_3_16_0_ym19_1_1492135216136_10080" style="color: rgb(0, 0, 0); font-family: times new roman, new york, times, serif; font-size: 16px; background-color: rgb(255, 255, 255);"><div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892m_-2889796519550700373yiv7198155306yui_3_16_0_ym19_1_1492131028055_3496" dir="ltr"><span>Hi Hank,</span></div><div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892m_-2889796519550700373yiv7198155306yui_3_16_0_ym19_1_1492131028055_3496" dir="ltr"><span><br clear="none"></span></div><div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892m_-2889796519550700373yiv7198155306yui_3_16_0_ym19_1_1492131028055_3496" dir="ltr"><span id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892m_-2889796519550700373yiv7198155306yui_3_16_0_ym19_1_1492131028055_3592">No, I don't have the shaft, I purchased just the lower head. A 36 inch shaft is $28 but like you said, I really only need a few inches of it so don't really want to purchase it that way.</span></div><div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892m_-2889796519550700373yiv7198155306yui_3_16_0_ym19_1_1492131028055_3496" dir="ltr"><span><br clear="none"></span></div><div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892m_-2889796519550700373yiv7198155306yui_3_16_0_ym19_1_1492131028055_3496" dir="ltr"><span>Jon</span></div> <div class="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892m_-2889796519550700373yiv7198155306qtdSeparateBR" id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892m_-2889796519550700373yiv7198155306yui_3_16_0_ym19_1_1492131028055_3459"><br clear="none"><br clear="none"></div><div class="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892m_-2889796519550700373yiv7198155306yahoo_quoted" id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892m_-2889796519550700373yiv7198155306yui_3_16_0_ym19_1_1492131028055_3451" style="display: block;"> <div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892m_-2889796519550700373yiv7198155306yui_3_16_0_ym19_1_1492131028055_3450" style="font-family: times new roman, new york, times, serif; font-size: 16px;"> <div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892m_-2889796519550700373yiv7198155306yui_3_16_0_ym19_1_1492131028055_3449" style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892m_-2889796519550700373yiv7198155306yui_3_16_0_ym19_1_1492131028055_3458" dir="ltr"><font id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892m_-2889796519550700373yiv7198155306yui_3_16_0_ym19_1_1492131028055_3457" face="Arial" size="2"> On Thursday, April 13, 2017 8:27 PM, hank pronk via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank" rel="nofollow" shape="rect" ymailto="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs. org</a>> wrote:<br clear="none"></font></div> <br clear="none"><br clear="none"> <div class="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892m_-2889796519550700373yiv7198155306y_msg_container" id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892m_-2889796519550700373yiv7198155306yui_3_16_0_ym19_1_1492131028055_3448"><div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892m_-2889796519550700373yiv7198155306"><div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892m_-2889796519550700373yiv7198155306yui_3_16_0_ym19_1_1492131028055_3447"><div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892m_-2889796519550700373yiv7198155306yui_3_16_0_ym19_1_1492131028055_3446" style="color: rgb(0, 0, 0); font-family: Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 13px; background-color: rgb(255, 255, 255);"><div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892m_-2889796519550700373yiv7198155306yui_3_16_0_ym19_1_1492131028055_3455"><span id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892m_-2889796519550700373yiv7198155306yui_3_16_0_ym19_1_1492131028055_3456">Jon, </span></div><div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892m_-2889796519550700373yiv7198155306yui_3_16_0_ym19_1_1492131028055_3454"><span id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892m_-2889796519550700373yiv7198155306yui_3_16_0_ym19_1_1492131028055_3453">Do you have the shaft that used to screw into the motor? if so, you can cut it down to a couple inches long and put a waterline compression fitting on that. Then reduce from the compression pipe thread. Or you can thread the inside of that stub shaft with a pipe tap and reduce from that, providing it is the heave fibreglass shaft.</span></div><div id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892m_-2889796519550700373yiv7198155306yui_3_16_0_ym19_1_1492131028055_3452"><span>Hank</span></div> <div class="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892m_-2889796519550700373yiv7198155306qtdSeparateBR" id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892m_-2889796519550700373yiv7198155306yui_3_16_0_ym19_1_1492131028055_3445"><br clear="none"><br clear="none"></div></div></div></div></div> </div> </div> </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 href="mailto:Personal_Submersibles@psubs.org" target="_blank" rel="nofollow" shape="rect" ymailto="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs. org</a></span><br clear="none"><span><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank" rel="nofollow" shape="rect">http://www.psubs.org/mailman/ listinfo.cgi/personal_ submersibles</a></span><br clear="none"></div></blockquote></div></div><div class="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892m_-2889796519550700373yqt0765085698" id="yiv1112115268m_-7070854052861122459m_-3188659661789124660yiv7301734892m_-2889796519550700373yqt26092">______________________________ _________________<br clear="none">Personal_Submersibles mailing list<br clear="none"><a href="mailto:Personal_Submersibles@psubs.org" target="_blank" rel="nofollow" shape="rect" ymailto="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs. org</a><br clear="none"><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank" rel="nofollow" shape="rect">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><br clear="none">______________________________ _________________<br clear="none">
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