<html><body><div style="color:#000; background-color:#fff; font-family:tahoma, new york, times, serif;font-size:12pt"><div style="RIGHT: auto"><SPAN style="RIGHT: auto">Alan,</SPAN></div>
<div style="FONT-SIZE: 16px; FONT-FAMILY: tahoma, new york, times, serif; RIGHT: auto; COLOR: rgb(0,0,0); FONT-STYLE: normal; BACKGROUND-COLOR: transparent"><SPAN style="RIGHT: auto">I bet a lot of force, plus what about shrapnel hitting the pilot. I think a saws all would do the trick. Isn't there a rule in the submarine bible, thou shalt not wreck a perfectly good dome. </SPAN></div>
<div style="RIGHT: auto">Hank<VAR id=yui-ie-cursor></VAR><BR style="RIGHT: auto"></div>
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<DIV class=hr style="FONT-SIZE: 0px; BORDER-TOP: #ccc 1px solid; HEIGHT: 0px; BORDER-RIGHT: #ccc 1px solid; BORDER-BOTTOM: #ccc 1px solid; PADDING-BOTTOM: 0px; PADDING-TOP: 0px; PADDING-LEFT: 0px; MARGIN: 5px 0px; BORDER-LEFT: #ccc 1px solid; LINE-HEIGHT: 0; PADDING-RIGHT: 0px" readonly="true" contenteditable="false"></DIV><FONT size=2 face=Arial><B><SPAN style="FONT-WEIGHT: bold">From:</SPAN></B> Alan <alanlindsayjames@yahoo.com><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> Tuesday, September 3, 2013 11:57:43 AM<BR><B><SPAN style="FONT-WEIGHT: bold">Subject:</SPAN></B> Re: [PSUBS-MAILIST] vacuum packed<BR></FONT></DIV>
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<DIV>I have seen small hammers hanging from the walls of</DIV>
<DIV>Some pretty high tech trains recently. I presume they are for breaking the windows</DIV>
<DIV>For exit in accidents. ( could be wrong ).</DIV>
<DIV>How much effort would it take to break a K250 dome at it's apex?</DIV>
<DIV>Alan<BR><BR>Sent from my iPad</DIV>
<DIV><BR>On 3/09/2013, at 7:27 PM, "Smyth, Alec" <<A href="mailto:Alec.Smyth@covisint.com" rel=nofollow target=_blank ymailto="mailto:Alec.Smyth@covisint.com">Alec.Smyth@covisint.com</A>> wrote:<BR><BR></DIV>
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<div class=yiv1906844231MsoNormal><SPAN style="FONT-SIZE: 11pt; 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 they've 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.</SPAN></div>
<div class=yiv1906844231MsoNormal><SPAN style="FONT-SIZE: 11pt; COLOR: #1f497d"> </SPAN></div>
<div class=yiv1906844231MsoNormal><SPAN style="FONT-SIZE: 11pt; 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.</SPAN></div>
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<div class=yiv1906844231MsoNormal><SPAN style="FONT-SIZE: 11pt; COLOR: #1f497d">Best,</SPAN></div>
<div class=yiv1906844231MsoNormal><SPAN style="FONT-SIZE: 11pt; COLOR: #1f497d"> </SPAN></div>
<div class=yiv1906844231MsoNormal><SPAN style="FONT-SIZE: 11pt; COLOR: #1f497d">Alec</SPAN></div>
<div class=yiv1906844231MsoNormal><SPAN style="FONT-SIZE: 11pt; COLOR: #1f497d"> </SPAN></div>
<div class=yiv1906844231MsoNormal><B><SPAN style="FONT-SIZE: 10pt">From:</SPAN></B><SPAN style="FONT-SIZE: 10pt"> Personal_Submersibles [<A href="mailto:personal_submersibles-bounces@psubs.org" rel=nofollow target=_blank ymailto="mailto:personal_submersibles-bounces@psubs.org">mailto:personal_submersibles-bounces@psubs.org</A>] <B>On Behalf Of </B><A href="mailto:vbra676539@aol.com" rel=nofollow target=_blank ymailto="mailto:vbra676539@aol.com">vbra676539@aol.com</A><BR><B>Sent:</B> Tuesday, September 03, 2013 1:00 PM<BR><B>To:</B> <A href="mailto:personal_submersibles@psubs.org" rel=nofollow target=_blank ymailto="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</A><BR><B>Subject:</B> Re: [PSUBS-MAILIST] vacuum packed</SPAN></div>
<div class=yiv1906844231MsoNormal> </div>
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<div class=yiv1906844231MsoNormal><SPAN style="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.</SPAN></div></DIV>
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<div class=yiv1906844231MsoNormal><SPAN style="COLOR: black">Vance</SPAN></div></DIV>
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<div class=yiv1906844231MsoNormal style="MARGIN-BOTTOM: 12pt"><SPAN style="FONT-SIZE: 10pt; COLOR: black">-----Original Message-----<BR>From: Alan <<A href="mailto:alanlindsayjames@yahoo.com" rel=nofollow target=_blank ymailto="mailto:alanlindsayjames@yahoo.com">alanlindsayjames@yahoo.com</A>><BR>To: Personal Submersibles General Discussion <<A href="mailto:personal_submersibles@psubs.org" rel=nofollow target=_blank ymailto="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</SPAN></div>
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<div class=yiv1906844231MsoNormal><SPAN style="FONT-SIZE: 10pt; COLOR: black">A while back Emile offered plans for his submarine.</SPAN></div></DIV>
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<div class=yiv1906844231MsoNormal><SPAN style="FONT-SIZE: 10pt; COLOR: black">Perhaps there is the option of adopting them over the K boat plans?</SPAN></div></DIV>
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<div class=yiv1906844231MsoNormal><SPAN style="FONT-SIZE: 10pt; COLOR: black">Alan</SPAN></div></DIV>
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<div class=yiv1906844231MsoNormal><SPAN style="FONT-SIZE: 10pt; COLOR: black"><BR>Sent from my iPad</SPAN></div></DIV>
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<div class=yiv1906844231MsoNormal style="MARGIN-BOTTOM: 12pt"><SPAN style="FONT-SIZE: 10pt; COLOR: black"><BR>On 3/09/2013, at 6:10 PM, James Frankland <<A href="mailto:jamesf@guernseysubmarine.com" rel=nofollow target=_blank ymailto="mailto:jamesf@guernseysubmarine.com">jamesf@guernseysubmarine.com</A>> wrote:</SPAN></div></DIV>
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<div class=yiv1906844231MsoNormal><SPAN style="FONT-SIZE: 10pt; 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.</SPAN></div></DIV>
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<div class=yiv1906844231MsoNormal><SPAN style="FONT-SIZE: 10pt; COLOR: black">regards</SPAN></div></DIV>
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<div class=yiv1906844231MsoNormal style="MARGIN-BOTTOM: 12pt"><SPAN style="FONT-SIZE: 10pt; COLOR: black">James </SPAN></div></DIV>
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<div class=yiv1906844231MsoNormal><SPAN style="FONT-SIZE: 10pt; COLOR: black">On 3 September 2013 15:36, <<A href="mailto:vbra676539@aol.com" rel=nofollow target=_blank ymailto="mailto:vbra676539@aol.com">vbra676539@aol.com</A>> wrote:</SPAN></div>
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<div class=yiv1906844231MsoNormal><SPAN style="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.</SPAN></div></DIV>
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<div class=yiv1906844231MsoNormal><SPAN style="COLOR: black">Vance</SPAN></div></DIV>
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<div class=yiv1906844231MsoNormal style="MARGIN-BOTTOM: 12pt"><SPAN style="FONT-SIZE: 10pt; COLOR: black">-----Original Message-----<BR>From: James Frankland <<A href="mailto:jamesf@guernseysubmarine.com" rel=nofollow target=_blank ymailto="mailto:jamesf@guernseysubmarine.com">jamesf@guernseysubmarine.com</A>><BR>To: Personal Submersibles General Discussion <<A href="mailto:personal_submersibles@psubs.org" rel=nofollow target=_blank ymailto="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</SPAN></div>
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<div class=yiv1906844231MsoNormal><SPAN style="FONT-SIZE: 10pt; 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.</SPAN></div></DIV>
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<div class=yiv1906844231MsoNormal><SPAN style="FONT-SIZE: 10pt; COLOR: black"> </SPAN></div></DIV>
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<div class=yiv1906844231MsoNormal><SPAN style="FONT-SIZE: 10pt; COLOR: black">Otherwise im probably going to make one anyway (once ive put in a new kitchen at home.. :)</SPAN></div></DIV>
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<div class=yiv1906844231MsoNormal><SPAN style="FONT-SIZE: 10pt; COLOR: black">Kind Regards</SPAN></div></DIV>
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<div class=yiv1906844231MsoNormal><SPAN style="FONT-SIZE: 10pt; COLOR: black">James </SPAN></div></DIV>
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<div class=yiv1906844231MsoNormal><SPAN style="FONT-SIZE: 10pt; COLOR: black"> </SPAN></div></DIV>
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<div class=yiv1906844231MsoNormal><SPAN style="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?</SPAN></div></DIV>
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<div class=yiv1906844231MsoNormal><SPAN style="COLOR: black"> </SPAN></div></DIV>
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<div class=yiv1906844231MsoNormal><SPAN style="COLOR: black">>Vance</SPAN></div></DIV>
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