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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Well, that’s one I had to spend some thinking time on when PSUBS introduced the “convention diving prerequisite” that hatches open from either side. I eventually
came to a solution that was jointly developed with Greg Cottrell. We put a bevel on the bottom outside edge of the dome, and sealed it with an O ring instead of potting it. The dome floats on a flat ring of polycarbonate lubricated with vacuum grease, and
is secured only with wing nuts, so that in the event of needing to open the sub from the outside, that can be readily done without tools. It is not strictly speaking a hatch you can operate from either side, but it does accomplish the goal of emergency access.
I investigated other options similar to the Deep Worker system, but could not come up with anything that would work – the difference is that the Deep Workers have a massive hatch ring, which gives you a lot more to work with in terms of locating through-hulls
or other hardware.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Personally what I would explore is closing the hatch with shock cord, so that in the event of an emergency you could just lift the hatch a little and slice
through the cords. But for that to work, you would really need nicely machined surfaces. Snoopy’s is not re-machined after fabrication, and therefore requires the clamp pressure for the two surfaces to conform and make a proper initial seal.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Best,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Alec<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Personal_Submersibles [mailto:personal_submersibles-bounces@psubs.org]
<b>On Behalf Of </b>vbra676539@aol.com<br>
<b>Sent:</b> Tuesday, September 03, 2013 1:00 PM<br>
<b>To:</b> personal_submersibles@psubs.org<br>
<b>Subject:</b> Re: [PSUBS-MAILIST] vacuum packed<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:black">Finding a inside/outside hatch closure for Captain George's K-250 dome would be a real boon, in my view. It might not have to be quite Deepworker strong, as we aren't lifting the
Ks by their hats, so to speak. But we could definitely do with something more user friendly.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:black">Vance<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black">-----Original Message-----<br>
From: Alan <<a href="mailto:alanlindsayjames@yahoo.com">alanlindsayjames@yahoo.com</a>><br>
To: Personal Submersibles General Discussion <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br>
Sent: Tue, Sep 3, 2013 9:40 am<br>
Subject: Re: [PSUBS-MAILIST] vacuum packed<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black">A while back Emile offered plans for his submarine.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black">Perhaps there is the option of adopting them over the K boat plans?<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black">Alan<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"><br>
Sent from my iPad<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"><br>
On 3/09/2013, at 6:10 PM, James Frankland <<a href="mailto:jamesf@guernseysubmarine.com">jamesf@guernseysubmarine.com</a>> wrote:<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black">Well, its just an idea\thought. Im not sure on the legalities of it, but if there was a Kboat replacement, id be happy to make a prototype and test it. Otherwise
i will probably make a new hatch anyway over the winter, seeing as i have the dish.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black">regards<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black">James
<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black">On 3 September 2013 15:36, <<a href="mailto:vbra676539@aol.com">vbra676539@aol.com</a>> wrote:<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:black">We'll need to get Jon in on this for liability considerations. That said, I think there might be a set of Perry drawings out there (although the hatches are heavier than we need)
and aaI have an archive of the Nekton construction drawings that I'm looking for a way to apreserve. If the legal end doesn't bite us, then I'm sure we can figure how to adapt proven technology to our requirements, and then provide the result with the K-plans
sold on the site.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:black">Vance<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black">-----Original Message-----<br>
From: James Frankland <<a href="mailto:jamesf@guernseysubmarine.com">jamesf@guernseysubmarine.com</a>><br>
To: Personal Submersibles General Discussion <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br>
Sent: Tue, Sep 3, 2013 1:45 am<br>
Subject: Re: [PSUBS-MAILIST] vacuum packed<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black">Agree strongly with Vance here, the standard K hatch is rubbish. If anyone wants to chip in any ideas for a "club design" i'm happy to make it over the winter.
I have a spare dish which was left over from the endcap hole II cut out. Its just the right size, dished and 13mm thick.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black">Otherwise im probably going to make one anyway (once ive put in a new kitchen at home.. :)<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black">Kind Regards<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black">James <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:black">>I do think it would serve us well for someone to design a K-hatch >modified with thru-hatch closure. It is truly nutty to bolt ourselves into a sub >without some way for someone on
the outside to help us, should we need >it. Maybe something for the next conference?<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:black"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-family:"Arial","sans-serif";color:black">>Vance<o:p></o:p></span></p>
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_______________________________________________<br>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"><o:p> </o:p></span></p>
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<pre><tt><span style="color:black">_______________________________________________<o:p></o:p></span></tt></pre>
<pre><tt><span style="color:black">Personal_Submersibles mailing list<o:p></o:p></span></tt></pre>
<pre><tt><span style="color:black"><a href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><o:p></o:p></span></tt></pre>
<pre><tt><span style="color:black"><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><o:p></o:p></span></tt></pre>
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_______________________________________________<br>
Personal_Submersibles mailing list<br>
<a href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br>
<a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black">_______________________________________________<br>
Personal_Submersibles mailing list<br>
<a href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br>
<a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><o:p></o:p></span></p>
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<pre style="background:white"><tt><span style="color:black">_______________________________________________<o:p></o:p></span></tt></pre>
<pre style="background:white"><tt><span style="color:black">Personal_Submersibles mailing list<o:p></o:p></span></tt></pre>
<pre style="background:white"><tt><span style="color:black"><a href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><o:p></o:p></span></tt></pre>
<pre style="background:white"><tt><span style="color:black"><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><o:p></o:p></span></tt></pre>
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