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<div dir="ltr" data-setdir="false">Congratulations on the successful surface maneuvering test and dive. You might want to experiment with different orifice inserts in the forward MBT vent opening to see if you can reduce the pitching moment when flooding by reducing the flowrate of air out of this tank. I use this technique on the R300 for the same purpose.</div><div dir="ltr" data-setdir="false"><br></div><div dir="ltr" data-setdir="false">Cliff</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 Wednesday, August 26, 2020, 11:27:53 AM CDT, Brian Cox via Personal_Submersibles <personal_submersibles@psubs.org> wrote:
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<div><div id="ydpd31af308yiv4548716850"><div><div style="font-family:Arial, sans-serif;font-size:10pt;"><font size="2" style="font-family:Arial, sans-serif;">Yeah, that's my super secret emergency dive </font><font face="Arial, sans-serif" size="2">procedure !</font><div><font face="Arial, sans-serif" size="2"><br clear="none"></font></div><div><font face="Arial, sans-serif" size="2">Brian</font></div><div><font face="Arial, sans-serif" size="2"><br clear="none"></font></div><div><font face="Arial, sans-serif" size="2"><br clear="none"></font><br clear="none"><span style="font-family:Arial, sans-serif;font-size:10pt;">--- personal_submersibles@psubs.org wrote:</span><br clear="none"><br clear="none"><span style="font-family:Arial, sans-serif;font-size:10pt;">From: Alec Smyth via Personal_Submersibles <personal_submersibles@psubs.org></span><br clear="none"><span style="font-family:Arial, sans-serif;font-size:10pt;">To: Personal Submersibles General Discussion <personal_submersibles@psubs.org></span><br clear="none"><span style="font-family:Arial, sans-serif;font-size:10pt;">Subject: Re: [PSUBS-MAILIST] Sub Launch at Harbor</span><br clear="none"><span style="font-family:Arial, sans-serif;font-size:10pt;">Date: Wed, 26 Aug 2020 12:03:20 -0400</span><br clear="none"><br clear="none"><div dir="ltr" style="font-family:Arial, sans-serif;font-size:10pt;">Hey, that wasn't a launch, it was a dive!! Congrats! When the bow went down like that, did it rest on the bottom? That was a pretty radical angle, and the speed of it makes me think you had a massive free surface displacement in the MBT. Normally that induces lateral instability, but due to the length of your boat in this case it would be longitudinal instability.<div><br clear="none"></div><div>Thanks,</div><div>Alec</div></div><br clear="none"><div style="font-family:Arial, sans-serif;font-size:10pt;"><div class="ydpd31af308yiv4548716850yqt4080693028" id="ydpd31af308yiv4548716850yqt65581"><div dir="ltr">On Wed, Aug 26, 2020 at 10:44 AM Brian Cox via Personal_Submersibles <<a shape="rect" href="mailto:personal_submersibles@psubs.org" rel="nofollow" target="_blank">personal_submersibles@psubs.org</a>> wrote:<br clear="none"></div><blockquote style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex;"><div style="font-family:Arial, sans-serif;font-size:10pt;"><font size="2">Hi All, </font><div><font size="2"> Have a couple of videos from down at the harbor:</font></div><div><font size="2"><br clear="none"></font></div><div><font size="2"><br clear="none"></font></div><div><font size="2"><a shape="rect" href="https://www.youtube.com/watch?v=iERfLiioGJA&t=628s" rel="nofollow" target="_blank">https://www.youtube.com/watch?v=iERfLiioGJA&t=628s</a><br clear="none"></font></div><div><br clear="none"></div><div><br clear="none"></div><div><br clear="none"></div><div><a shape="rect" href="https://www.youtube.com/watch?v=OGiAqeocq4s" rel="nofollow" target="_blank">https://www.youtube.com/watch?v=OGiAqeocq4s</a><br clear="none"></div><div><br clear="none"></div><div><br clear="none"></div><div>Cheers,</div><div><br clear="none"></div><div>Brian</div><div><br clear="none"></div><div><br clear="none"></div></div>
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