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    <div class="moz-cite-prefix">On 6/23/2023 5:28 PM, Alan James via
      Personal_Submersibles wrote:<br>
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      I was thinking about the carbon fibre hull & wondered whether
      the heat differential from the outside to the inside on the 5"
      thick hull had anything to do with the Titan crushing.
      <div>At the wreck the water temperature is around 3°C & inside
        the sub it may be 24C (guessing). The carbon fibre is a great
        insulator so the outer face of the hull could be relatively
        stiffer due to the cold & take up more of the pressure than
        the more softer inner layers. Through cycling the outer layers
        could weaken. This would be unique to the submarine environment
        because I dont know anywhere else they would use 5" thick carbon
        fibre in freezing temperatures.</div>
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    <p>Aircraft come to mind. A wing spar of a large airplane flying at
      high altitude.</p>
    <p>Marc de Piolenc<br>
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      cite="mid:2024664532.4078437.1687512534536@mail.yahoo.com">
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            <div>On Fri, 23 Jun 2023 at 6:48 pm, Alec Smyth via
              Personal_Submersibles</div>
            <div><a class="moz-txt-link-rfc2396E" href="mailto:personal_submersibles@psubs.org"><personal_submersibles@psubs.org></a> wrote:</div>
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    <pre class="moz-signature" cols="72">-- 
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