<div dir="auto">Just so it's clear....66 inches (167.64cm) is the length of just the pressure hull .</div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Aug 7, 2023, 12:39 PM Daniel Lance <<a href="mailto:lanceind@gmail.com">lanceind@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="auto"><div dir="auto"></div>Sean , <div dir="auto">You're correct . A 36" diameter 2 to 1 elliptical head is 9 inches (22.86cm)deep. I made the mistake of referring to the K250 drawing . I should know better ...both the K250 and K350 drawings are full of mistakes and inaccuracies. I did what I should have done in the first place....I went out and measured a head on my K350....9 inches ! Imagine that !</div><div dir="auto">So that revises down the overall length of a K250 hull to 66inches (167.64cm).</div><div dir="auto">Dan<br><div class="gmail_quote" dir="auto"><div dir="ltr" class="gmail_attr">On Mon, Aug 7, 2023, 12:02 PM Sean T. Stevenson via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" rel="noreferrer noreferrer noreferrer" target="_blank">personal_submersibles@psubs.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">On a 36" ID cylinder, a mating 2:1 semi-elliptical head would be 9" from the inside center of the head along the major axis to the plane at the curvature break at the end of the cylinder. If you're measuring (or if the plans show) a 14" depth of head, that would seem to indicate either that the head is of a non-standard elliptical form, or is torispherical (not elliptical), or is simply manufactured with a substantially longer (5") length of straight flange than is specified by the rules.<br><br>I am curious to know which?<br><br>Sean<br><br><br><br>-------- Original Message --------<br>On Aug. 7, 2023, 09:16, Daniel Lance via Personal_Submersibles < <a href="mailto:personal_submersibles@psubs.org" rel="noreferrer noreferrer noreferrer noreferrer" target="_blank">personal_submersibles@psubs.org</a>> wrote:<blockquote><br><div dir="ltr">Rapheal ,<div>The cylinder section of the K250 hull is 48" long ( approx. 121.92cm) X 36" (91.44cm) in diameter .Each elliptical head is approximately 14" (35.56cm) deep X 2pcs . For a total pressure hull length of approximately 76" (193.04cm).</div><div>Dan Lance</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sat, Aug 5, 2023 at 1:08 PM Raphael SOULIAC via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" rel="noreferrer noreferrer noreferrer noreferrer" target="_blank">personal_submersibles@psubs.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">Hello, quick question for the k-250 owners/builders. What are the dimensions ( specially the length) of the pressure hull ? Thanks<div><br></div><div>Raphael</div></div>
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