<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:10pt"><div><span>Rick,</span></div><div style="color: rgb(0, 0, 0); font-size: 13.333333969116211px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style: normal;"><span>alternatively just fill them up with water, then pressurize them.</span></div><div style="color: rgb(0, 0, 0); font-size: 13.333333969116211px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style: normal;">I had a factory job as a youngster doing exactly that with with hot water cylinders.</div><div style="color: rgb(0, 0, 0); font-size: 13.333333969116211px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color:
transparent; font-style: normal;">Really stimulating job.</div><div style="color: rgb(0, 0, 0); font-size: 13.333333969116211px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style: normal;">Alan</div><div><br></div> <div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 10pt;"> <div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 12pt;"> <div dir="ltr"> <hr size="1"> <font size="2" face="Arial"> <b><span style="font-weight:bold;">From:</span></b> Alan James <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> Friday, November 8, 2013 9:50 AM<br> <b><span style="font-weight:
bold;">Subject:</span></b> Re: [PSUBS-MAILIST] buoyancy<br> </font> </div> <div class="y_msg_container"><br><div id="yiv4161731233"><div><div style="color: rgb(0, 0, 0); background-color: rgb(255, 255, 255); font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 10pt;"><div><span>Rick,</span></div><div style="color: rgb(0, 0, 0); font-size: 13.333333969116211px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style: normal;"><span>If you are just concerned about the leaks rather than them crushing,</span></div><div style="color: rgb(0, 0, 0); font-size: 13.333333969116211px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style: normal;"><span>what about pressurizing them to 300psi internally in a water bath or pool.</span></div><div
style="color: rgb(0, 0, 0); font-size: 13.333333969116211px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style: normal;"><span>I am not sure that because it doesn't leak from inside out it won't leak</span></div><div style="color: rgb(0, 0, 0); font-size: 13.333333969116211px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style: normal;"><span>from outside in, but it would be better than nothing & a lot less trouble</span></div><div style="color: rgb(0, 0, 0); font-size: 13.333333969116211px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style: normal;"><span>than taking them out to sea. Also if it did leak it would be easier to see</span></div><div style="color: rgb(0, 0, 0); font-size:
13.333333969116211px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style: normal;"><span>where it was leaking from.</span></div><div style="color: rgb(0, 0, 0); font-size: 13.333333969116211px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style: normal;"><span>Alan</span></div><div style="color: rgb(0, 0, 0); font-size: 13.333333969116211px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style: normal;"><span><br clear="none"></span></div><div><br clear="none"></div> <div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 10pt;"> <div style="font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size:
12pt;"> <div class="yiv4161731233yqt3128785477" id="yiv4161731233yqt10736"><div dir="ltr"> <hr size="1"> <font size="2" face="Arial"> <b><span style="font-weight:bold;">From:</span></b> Land N Sea <landnsea1@hawaiiantel.net><br clear="none"> <b><span style="font-weight:bold;">To:</span></b> personal_submersibles@psubs.org <br clear="none"> <b><span style="font-weight:bold;">Sent:</span></b> Friday, November 8, 2013 8:18 AM<br clear="none"> <b><span style="font-weight:bold;">Subject:</span></b> [PSUBS-MAILIST] buoyancy<br clear="none"> </font> </div> <div class="yiv4161731233y_msg_container"><br clear="none"><div id="yiv4161731233">
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<div style="font-size: 12pt; font-family: Calibri; color: rgb(0, 0, 0);">
<div>I was thinking of testing both my battery pods to 600’ before I weld them
to the hull so that if there are any issues with leakage I would still be able
to get them on a lathe. I added two vents per pod with O rings so that I can
push/suck air across the batteries while charging so there are a couple of more
places for leaks to occur. I did the calks' and they weigh in at 295 LBS. each
dry with a negative displacement of around 30 lbs. I was hoping that they would
barley float with no batteries in them so that I could weight them just slightly
negative for ease of launching and retrieving but that’s not the case. I need to
come up with about 30 lbs. of positive buoyancy and don’t have any syntactic
foam so I figured I could strap some 4” X 4”, on them to achieve that. This may
be a dumb question but does anyone happen to know the per foot buoyancy of a 4”
X 4” in sea water? If not I’ll head down to the ocean and start testing.</div>
<div>I also mentioned the other week about my desire to omit the plate that is
welded to the pressure hull and battery pod of a K-350 and was wondering if any
one could comment on that.</div>
<div> </div>
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