<DIV style="font-family:Arial, sans-serif; font-size:10pt;"><FONT size="2">David, Maybe I could give you a call. Or call me</FONT><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;">--- personal_submersibles@psubs.org wrote:</SPAN><BR><BR><SPAN style="font-size: 10pt;">From: David Colombo via Personal_Submersibles <personal_submersibles@psubs.org></SPAN><BR><SPAN style="font-size: 10pt;">To: Personal Submersibles General Discussion <personal_submersibles@psubs.org></SPAN><BR><SPAN style="font-size: 10pt;">Subject: Re: [PSUBS-MAILIST] Macrospheres</SPAN><BR><SPAN style="font-size: 10pt;">Date: Thu, 13 Jun 2019 08:40:46 -0700</SPAN><BR><BR><DIV dir="auto" style="font-size: 10pt;">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 style="font-size: 10pt;"><DIV dir="ltr">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 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">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">personal_submersibles@psubs.org</A>></SPAN><BR><SPAN style="font-size:10pt">To: Personal Submersibles General Discussion <<A href="mailto:personal_submersibles@psubs.org">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">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">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">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">personal_submersibles@psubs.org</A>></SPAN><BR><SPAN style="font-size:10pt">To: "Personal Submersibles General Discussion" <<A href="mailto:personal_submersibles@psubs.org">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">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">personal_submersibles@psubs.org</A>></SPAN><BR><SPAN style="font-size:10pt">To: "PSubs " <<A href="mailto:personal_submersibles@psubs.org">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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