<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>James,</div><div id="AppleMailSignature">the saddle tanks don't look very substantial. Could you just seal</div><div id="AppleMailSignature">them & counteract the additional buoyancy with lead at the bottom</div><div id="AppleMailSignature">of the sub. Or use syntactic foam & additional lead instead.</div><div id="AppleMailSignature">Will add to the weight on the trailer, but shouldn't be that much</div><div id="AppleMailSignature">should it! How much buoyancy do you think you will get when you</div><div id="AppleMailSignature">subtract the weight of the tubes?</div><div id="AppleMailSignature">Vance gave us a design for a pneumatically activated valve at the </div><div id="AppleMailSignature">Islamorada conference. I believe Cliff has copied one of Hugh's </div><div id="AppleMailSignature">pneumatically activated valves.</div><div id="AppleMailSignature">I have been designing a solenoid valve based on Vance's design &</div><div id="AppleMailSignature">have been running my ambient with off the shelf solenoid valves.</div><div id="AppleMailSignature">This was not the most robust solution as they are subject to corrosion.</div><div id="AppleMailSignature">Alan</div><div id="AppleMailSignature"><br><br>Sent from my iPad</div><div><br>On 2/02/2018, at 5:53 AM, emile via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br><br></div><blockquote type="cite"><div><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><meta name="Generator" content="Microsoft Word 12 (filtered medium)"><!--[if !mso]><style>v\:* {behavior:url(#default#VML);}
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</o:shapelayout></xml><![endif]--><div class="WordSection1"><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D">James,<o:p></o:p></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D"><o:p> </o:p></span></p><p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D">The Drebbel has a lever operated 1 ½” ball valve. <o:p></o:p></span></p><p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D">You could add a deck plate. This covers the valves, looks good with saddle tanks and is very usefull.<o:p></o:p></span></p><p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D"><o:p> </o:p></span></p><p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D">Br, Emile<o:p></o:p></span></p><p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Arial","sans-serif";color:#1F497D"><o:p> </o:p></span></p><div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm"><p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">Van:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Personal_Submersibles [<a href="mailto:personal_submersibles-bounces@psubs.org">mailto:personal_submersibles-bounces@psubs.org</a>] <b>Namens </b>James Frankland via Personal_Submersibles<br><b>Verzonden:</b> donderdag 1 februari 2018 17:00<br><b>Aan:</b> Personal Submersibles General Discussion<br><b>Onderwerp:</b> [PSUBS-MAILIST] Mushroom Valve?<o:p></o:p></span></p></div><p class="MsoNormal"><o:p> </o:p></p><div><div><p class="MsoNormal">Hi All,<o:p></o:p></p></div><div><p class="MsoNormal"><o:p> </o:p></p></div><div><p class="MsoNormal">I am adding saddle tanks to Jodie B. <o:p></o:p></p></div><div><p class="MsoNormal"><o:p> </o:p></p></div><div><p class="MsoNormal">Im not 100% sure what to do with regards to the vent plumbing. I would like to ask if anyone has any advice? <o:p></o:p></p></div><div><p class="MsoNormal"><o:p> </o:p></p></div><div><p class="MsoNormal">I am thinking of putting 2x through hulls on the top of the main pressure hull. For and aft of the tower and then piping the vents to a valve that would operate through them. Similar to the existing vents.<o:p></o:p></p></div><div><p class="MsoNormal"><o:p> </o:p></p></div><div><p class="MsoNormal">OR, fit the through hulls at the side so they penetrate the tanks and have a linkage of some sort that operates valves attached to the top of each tank, for and aft. Some sort of mushroom valve??<o:p></o:p></p></div><div><p class="MsoNormal"><o:p> </o:p></p></div><div><p class="MsoNormal">Any ideas? What have other people done?<o:p></o:p></p></div><div><p class="MsoNormal"> <br><image002.jpg><o:p></o:p></p></div><div><p class="MsoNormal"><image004.jpg><br><br><o:p></o:p></p></div></div></div></div></blockquote><blockquote type="cite"><div><span>_______________________________________________</span><br><span>Personal_Submersibles mailing list</span><br><span><a href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a></span><br><span><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a></span><br></div></blockquote></body></html>