<div dir="auto">Brian, before you order foam, I'll let you know my experience recently with the manufacture of foam made for Alec and myself.<div dir="auto">David</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Jun 12, 2019, 6:14 PM Brian Cox via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">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"><div style="font-family:Arial,sans-serif;font-size:10pt"><font size="2">Alan,</font><div><font size="2"> This is the obvious solution, and is a win win situation. I get more buoyancy and it takes less air to fill the ballast ! I pretty much had this in the back of my mind I think but forgot about it , but it's great, buoyancy up high where I need it and I have a ready made space for it to go. </font></div><div><font size="2"><br></font></div><div><font size="2">Brian</font></div><div><font size="2"><br></font></div><div><font size="2"><br></font><br><span style="font-size:10pt">--- <a href="mailto:personal_submersibles@psubs.org" target="_blank" rel="noreferrer">personal_submersibles@psubs.org</a> wrote:</span><br><br><span style="font-size:10pt">From: Alan via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank" rel="noreferrer">personal_submersibles@psubs.org</a>></span><br><span style="font-size:10pt">To: Personal Submersibles General Discussion <<a href="mailto:personal_submersibles@psubs.org" target="_blank" rel="noreferrer">personal_submersibles@psubs.org</a>></span><br><span style="font-size:10pt">Subject: Re: [PSUBS-MAILIST] Macrospheres</span><br><span style="font-size:10pt">Date: Thu, 13 Jun 2019 11:38:16 +1200</span><br><br><div style="font-size:10pt"></div><div style="font-size:10pt">Brian,</div><div style="font-size:10pt">you would have to know for sure as if it started to crush, the momentum</div><div style="font-size:10pt">could cause the lot to collapse sending you to the bottom fast.</div><div style="font-size:10pt">Also with just the foam, it is more likely to degrade in time.</div><div style="font-size:10pt">You may be wasting time & money if it doesn't stabilise you as you hope. </div><div style="font-size:10pt">I still think my suggestion of tying various items to varying parts of the</div><div style="font-size:10pt">sub is the quickest & cheapest solution. You could use 20 litre plastic</div><div style="font-size:10pt">containers with handles, inflatable objects etc & anything heavy. </div><div style="font-size:10pt">Come with a truck load of items & divers to place the items & swing on </div><div style="font-size:10pt">the conning tower (test stability). Video the proceedings & weigh every</div><div style="font-size:10pt">thing later after you have it right. Any floatation devices you can hang weights</div><div style="font-size:10pt">off to check their floatation, after the cranes gone.</div><div style="font-size:10pt">It took me ages getting my ambient sub right. You think you've got it right,</div><div style="font-size:10pt">fail & go back home & melt some more lead :(</div><div style="font-size:10pt">Alan </div><div style="font-size:10pt"><br>On 13/06/2019, at 5:22 AM, Brian Cox via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank" rel="noreferrer">personal_submersibles@psubs.org</a>> wrote:<br><br></div><blockquote style="font-size:10pt"><div><div style="font-family:Arial,sans-serif;font-size:10pt"><font size="2">This 16lb density might work:</font><div><font size="2"><br></font></div><div><font size="2"><a href="http://www.uscomposites.com/foam.html" target="_blank" rel="noreferrer">http://www.uscomposites.com/foam.html</a></font></div><div><font size="2"><br></font></div><div><font size="2"><br></font></div><div><font size="2">Brian</font></div><div><font size="2"><br></font></div><div><font size="2"><br></font><br><span style="font-size:10pt">--- <a href="mailto:personal_submersibles@psubs.org" target="_blank" rel="noreferrer">personal_submersibles@psubs.org</a> wrote:</span><br><br><span style="font-size:10pt">From: Brian Cox via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank" rel="noreferrer">personal_submersibles@psubs.org</a>></span><br><span style="font-size:10pt">To: "Personal Submersibles General Discussion" <<a href="mailto:personal_submersibles@psubs.org" target="_blank" rel="noreferrer">personal_submersibles@psubs.org</a>></span><br><span style="font-size:10pt">Subject: Re: [PSUBS-MAILIST] Macrospheres</span><br><span style="font-size:10pt">Date: Wed, 12 Jun 2019 09:55:51 -0700</span><br><br><div style="font-size:10pt;font-family:Arial,sans-serif"><font size="2"> Or maybe a polyurethane foam would be strong enough ? Without the macrospheres </font><br><br><span style="font-size:10pt">--- <a href="mailto:personal_submersibles@psubs.org" target="_blank" rel="noreferrer">personal_submersibles@psubs.org</a> wrote:</span><br><br><span style="font-size:10pt">From: Brian Cox via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank" rel="noreferrer">personal_submersibles@psubs.org</a>></span><br><span style="font-size:10pt">To: "PSubs " <<a href="mailto:personal_submersibles@psubs.org" target="_blank" rel="noreferrer">personal_submersibles@psubs.org</a>></span><br><span style="font-size:10pt">Subject: [PSUBS-MAILIST] Macrospheres</span><br><span style="font-size:10pt">Date: Wed, 12 Jun 2019 09:45:05 -0700</span><br><br><div style="font-size:10pt;font-family:Arial,sans-serif"><div><font size="2"><font face="Arial, sans-serif">Hi All,</font></font></div><font size="2"><font face="Arial, sans-serif"><div><font size="2"><font face="Arial, sans-serif"><br></font></font></div>Does anyone know a good source for macrospheres? 500psi would suffice. I was thinking I could fill the upper chamber area of my ferro-cement with macrospheres and seal that top area off . I could use almost pure macro spheres since that area is already a defined chamber. I tried to find Cliff's reference to </font></font> "Macrospheres - Cumings Corp BA-38 1/4-3/8"
12-15 lbm/ft3" from his article on the psubs website but no luck. <div><br></div><div>Brian</div><div><br></div><div><br></div></div><span style="font-size:10pt">
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