<html><head></head><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px"><div id="yui_3_16_0_ym19_1_1469705549215_2663"><span id="yui_3_16_0_ym19_1_1469705549215_2662">Thanks Marc,</span></div><div id="yui_3_16_0_ym19_1_1469705549215_2675" dir="ltr"><span id="yui_3_16_0_ym19_1_1469705549215_2674">I will remember that if I decide to grow anything in my submarine.</span></div><div dir="ltr"><span>Alan</span></div><div class="qtdSeparateBR" id="yui_3_16_0_ym19_1_1469705549215_2588"><br><br></div><div class="yahoo_quoted" id="yui_3_16_0_ym19_1_1469705549215_2679" style="display: block;"> <div id="yui_3_16_0_ym19_1_1469705549215_2678" style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div id="yui_3_16_0_ym19_1_1469705549215_2677" style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div id="yui_3_16_0_ym19_1_1469705549215_2676" dir="ltr"> <font id="yui_3_16_0_ym19_1_1469705549215_2680" face="Arial" size="2"> <hr size="1"> <b><span style="font-weight: bold;">From:</span></b> Marc de Piolenc 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> Thursday, July 28, 2016 10:29 PM<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: [PSUBS-MAILIST] conical port seal<br> </font> </div> <div class="y_msg_container" id="yui_3_16_0_ym19_1_1469705549215_2686"><br>I remember something about soil testing... I guess we'll have to do <br clear="none">that, although there's no doubt in my mind that the soil conditions are <br clear="none">almost perfect. Sandy, well-drained, yet self-supporting to considerable <br clear="none">depths and with good support capabilities.<br clear="none"><br clear="none">Best,<br clear="none">Marc<br clear="none"><br clear="none">On 7/28/2016 10:36 AM, Brian Cox via Personal_Submersibles wrote:<br clear="none">> Hank, Is there anyway you could put the o ring in the flange? Also I<br clear="none">> seem to remember an o ring at the very edge of the viewport, with a<br clear="none">> slight 45 degree chamfer on the edge of the plexi glass, rather than a<br clear="none">> groove cut into the acrylic. I wouldn't want to put a groove into the<br clear="none">> acrylic.<br clear="none">><br clear="none">> Brian<br clear="none">><br clear="none">> --- <a id="yui_3_16_0_ym19_1_1469705549215_2687" href="mailto:personal_submersibles@psubs.org" shape="rect" ymailto="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a> wrote:<br clear="none">><br clear="none">> From: hank pronk via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" shape="rect" ymailto="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br clear="none">> To: Personal Submersibles General Discussion<br clear="none">> <<a href="mailto:personal_submersibles@psubs.org" shape="rect" ymailto="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br clear="none">> Subject: Re: [PSUBS-MAILIST] conical port seal<br clear="none">> Date: Thu, 28 Jul 2016 01:24:18 +0000 (UTC)<br clear="none">><br clear="none">> Hi Sean,<br clear="none">> Yes I did email it-- it is actually a picture from the Stichiw book, and<br clear="none">> is considered an acceptable option. I bet if I read it again I will<br clear="none">> find the spec for the seal. Personally I like the idea of an o-ring in<br clear="none">> the port. I always though that was bad, but I would sure prefer that.<br clear="none">> Today I came across a section in the Stachiw book showing a test<br clear="none">> sample port with a o-ring groove. It said there was no cracking<br clear="none">> initiated from the groove because it was close to the high pressure face<br clear="none">> of the port. Maybe I should chuck her up and machine a grove in it.<br clear="none">> What do you think about an o-ring.<br clear="none">> Hank<br clear="none">><br clear="none">><br clear="none">><br clear="none">> On Wednesday, July 27, 2016 7:07 PM, Sean T. Stevenson via<br clear="none">> Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" shape="rect" ymailto="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br clear="none">><br clear="none">><br clear="none">> Did you email it? I don't see it.<br clear="none">> I'd be inclined to stick with the PVHO recommendations (or Stachiw's<br clear="none">> book) for sealing arrangements. I think there is some discussion of<br clear="none">> gasket hardness and thickness if using a bearing gasket. I don't recall<br clear="none">> offhand though. A conical frustum window will probably use an o-ring though.<br clear="none">> Sean<br clear="none">><br clear="none">><br clear="none">> On July 27, 2016 6:27:11 PM MDT, hank pronk via Personal_Submersibles<br clear="none">> <<a href="mailto:personal_submersibles@psubs.org" shape="rect" ymailto="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br clear="none">><br clear="none">> Hi Sean,<br clear="none">> Did my picture make it?<br clear="none">> Hank<br clear="none">><br clear="none">><br clear="none">> On Wednesday, July 27, 2016 3:41 PM, Sean T. Stevenson via<br clear="none">> Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" shape="rect" ymailto="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br clear="none">><br clear="none">><br clear="none">> Hank - sorry, but a picture is worth a thousand words. Can you post<br clear="none">> a sketch of your present arrangement?<br clear="none">> Sean<br clear="none">><br clear="none">><br clear="none">> On July 27, 2016 3:10:03 PM MDT, hank pronk via<br clear="none">> Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" shape="rect" ymailto="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br clear="none">><br clear="none">> Hi Sean,<br clear="none">> I am trying decide the simplest way to create my low pressure<br clear="none">> seal on my conical window. I has a rubber gasket with silicone<br clear="none">> originally. I did that so when the acrylic compresses the<br clear="none">> silicone will drag the gasket along for the ride. I don't think<br clear="none">> it will compress much because it so oversized for the depth. I<br clear="none">> am wondering now if a thicker softer gasket is better. The<br clear="none">> gasket would be compressed by the retaining ring. If the<br clear="none">> acrylic does compress, the gasket can expand to maintain the<br clear="none">> seal in the event that the sub reaches the surface before the<br clear="none">> acrylic has expanded.<br clear="none">> Do you have a recommendation.<br clear="none">> Thank you<br clear="none">> Hank<br clear="none">><br clear="none">> ------------------------------------------------------------------------<br clear="none">><br clear="none">> Personal_Submersibles mailing list<br clear="none">> <a id="yui_3_16_0_ym19_1_1469705549215_2688" href="mailto:Personal_Submersibles@psubs.org" 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" shape="rect">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><br clear="none">><br clear="none">><br clear="none">> _______________________________________________<br clear="none">> 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