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<div dir="ltr" data-setdir="false">Sean,</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">My understanding was similar to River's that the viewport was a non-standard PVHO design. It sort of looked to me like a solid piece, convex on exterior and flat on interior but I can't really tell from online photos alone.</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">A properly certified spherical segment or even flat conical was not a huge engineering obstacle to overcome for Titanic's depth. Makes you wonder why they didn't go that route, assuming they didn't.</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">Jon</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false"><br></div><div><br></div>
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On Friday, June 30, 2023 at 12:02:28 PM EDT, Sean T. Stevenson via Personal_Submersibles <personal_submersibles@psubs.org> wrote:
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<div><div id="ydpc63a32f5yiv7523459884"><div>That will be a spherical sector window with conical bearing surface. You can kind of see the inside surface abberation if you look closely at the window in your video (0:12 - 0:18). Certainly, a window with spherical outer face and flat inner face is not a standard geometry in any reference.<br clear="none"><br clear="none">The spherical sector window with conical face is a superior geometry because all points of the window are exclusively in compression. This is why PVHO-1 gives such windows a 20 year base service life, as opposed to 10 years for square edge or flanged.<br clear="none"><br clear="none">Sean<br clear="none"><br clear="none">-------- Original Message --------<br clear="none">On Jun. 30, 2023, 09:05, Jon Wallace via Personal_Submersibles < personal_submersibles@psubs.org> wrote:<blockquote class="ydpc63a32f5yiv7523459884protonmail_quote"><br clear="none"></blockquote></div><div id="ydpc63a32f5yiv7523459884yqt55922" class="ydpc63a32f5yiv7523459884yqt9110101903"><div><div style="font-family:times new roman, new york, times, serif;font-size:16px;" class="ydpc63a32f5yiv7523459884ydp9e8e2d6eyahoo-style-wrap"><div></div>
<div dir="ltr">According to an article I found the viewport diameter was 53cm which I believe was the outside dimension. Based upon a video I found with Rush putting his hand up to the inside viewport I would estimate the inside diameter closer to 300mm. The seat appears conical however the viewport had a convex outside surface. Hard to say if that means it was just a regular spherical segment with conical seats or a conical viewport with a convex exterior surface.</div><div dir="ltr"><br clear="none"></div><div dir="ltr"><a shape="rect" href="https://www.insider.com/titan-missing-submersible-photos-interior-exterior-dock-launch-2023-6#the-titans-viewport-measured-21-inches-according-to-oceangate-thats-the-biggest-viewport-of-any-deep-diving-submersible-6" class="ydpc63a32f5yiv7523459884" rel="nofollow" target="_blank">https://www.insider.com/titan-missing-submersible-photos-interior-exterior-dock-launch-2023-6#the-titans-viewport-measured-21-inches-according-to-oceangate-thats-the-biggest-viewport-of-any-deep-diving-submersible-6</a><br clear="none"></div><div><br clear="none"></div><div dir="ltr"><a shape="rect" href="https://www.youtube.com/watch?v=ClkytJa0ghc" rel="nofollow" target="_blank">https://www.youtube.com/watch?v=ClkytJa0ghc</a> (See 0:13 to 0:29)<br clear="none"></div><div><br clear="none"></div><div><br clear="none"></div><div dir="ltr">Jon</div><div><br clear="none"></div><div dir="ltr"><br clear="none"></div><div dir="ltr"><br clear="none"></div>
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On Friday, June 30, 2023 at 10:07:33 AM EDT, MerlinSub@t-online.de via Personal_Submersibles <personal_submersibles@psubs.org> wrote:
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<div><div id="ydpc63a32f5yiv7523459884ydpde90c6fcyiv9066590423"><div><p style="margin:0px;"><span style="font-family:arial, helvetica, sans-serif;font-size:10pt;color:#000000;text-decoration:none;">I check out some pictures and based on a given length of 6500mm </span></p>
<p style="margin:0px;"><span style="font-family:arial, helvetica, sans-serif;font-size:10pt;color:#000000;text-decoration:none;">I come to the following rough figures: </span></p>
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<p style="margin:0px;"><span style="font-family:arial, helvetica, sans-serif;font-size:10pt;color:#000000;text-decoration:none;">Diameter hull 1600 mm</span></p>
<p style="margin:0px;"><span style="font-family:arial, helvetica, sans-serif;font-size:10pt;color:#000000;text-decoration:none;">Diameter front porthole outside 700 mm</span></p>
<p style="margin:0px;"><span style="font-family:arial, helvetica, sans-serif;font-size:10pt;color:#000000;text-decoration:none;">Diameter front porthole inside 466 mm </span></p>
<p style="margin:0px;"><span style="font-family:arial, helvetica, sans-serif;font-size:10pt;color:#000000;text-decoration:none;">(these diameters indicate that the porthole could be original designed as entrance..)</span></p>
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<p style="margin:0px;"><span style="font-family:arial, helvetica, sans-serif;font-size:10pt;color:#000000;text-decoration:none;">Now idear about the thickness of the acrylic </span></p>
<p style="margin:0px;"><span style="font-family:arial, helvetica, sans-serif;font-size:10pt;color:#000000;text-decoration:none;">- but will check out PHSME about standard flange angles tonight. </span></p>
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<p style="margin:0px;"><span style="font-family:arial, helvetica, sans-serif;font-size:10pt;color:#000000;text-decoration:none;">Carsten</span></p>
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<p style="margin:0px;">-----Original-Nachricht-----</p>
<p style="margin:0px;">Betreff: Re: [PSUBS-MAILIST] Titan submersible missing at Titanic site</p>
<p style="margin:0px;">Datum: 2023-06-30T15:31:14+0200</p>
<div id="ydpc63a32f5yiv7523459884ydpde90c6fcyiv9066590423yqtfd25221" class="ydpc63a32f5yiv7523459884ydpde90c6fcyiv9066590423yqt8316199822"><p style="margin:0px;">Von: "MerlinSub@t-online.de via Personal_Submersibles" <personal_submersibles@psubs.org></p>
<p style="margin:0px;">An: "Personal Submersibles General Discussion" <personal_submersibles@psubs.org></p>
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<p style="margin:0px;"><span style="font-family:arial, helvetica, sans-serif;font-size:10pt;color:#000000;text-decoration:none;">For me it looks like the biggest diameter porthole used in that deep. </span></p>
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<p style="margin:0px;"><span style="font-family:arial, helvetica, sans-serif;font-size:10pt;color:#000000;text-decoration:none;">Has somebody here inner and outer diameter and the thickness?</span></p>
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<p style="margin:0px;"><span style="font-family:arial, helvetica, sans-serif;font-size:10pt;color:#000000;text-decoration:none;">Carsten</span></p>
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<p style="margin:0px;">-----Original-Nachricht-----</p>
<p style="margin:0px;">Betreff: Re: [PSUBS-MAILIST] Titan submersible missing at Titanic site</p>
<p style="margin:0px;">Datum: 2023-06-29T21:11:55+0200</p>
<p style="margin:0px;">Von: "Jon Wallace via Personal_Submersibles" <personal_submersibles@psubs.org></p>
<p style="margin:0px;">An: "Personal Submersibles General Discussion" <personal_submersibles@psubs.org></p>
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<div dir="ltr">The pictures of Titan that I see in water show 16 bolts holding the retaining ring in place. See attached photo.</div>
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<div>On Thursday, June 29, 2023 at 11:49:18 AM EDT, MerlinSub@t-online.de via Personal_Submersibles <personal_submersibles@psubs.org> wrote:</div>
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<p style="margin:0px;"><span style="font-family:arial, helvetica, sans-serif;font-size:10pt;color:#000000;text-decoration:none;">I have seen a video how they make the carbon cylinder and can imagine that the boat imploded in longitudinal direction. </span></p>
<p style="margin:0px;"><span style="font-family:arial, helvetica, sans-serif;font-size:10pt;color:#000000;text-decoration:none;">Create a massive shock wave with push the window out (not in). As I saw in another video the window was hold by only 4 bolts outside. </span></p>
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<p style="margin:0px;"><span style="font-family:arial, helvetica, sans-serif;font-size:10pt;color:#000000;text-decoration:none;">All titan parts in the video seems undamaged. </span></p>
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<p style="margin:0px;"><span style="font-family:arial, helvetica, sans-serif;font-size:10pt;color:#000000;text-decoration:none;">Carsten</span></p>
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