<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div></div><div>Brian,</div><div>you would have to know for sure as if it started to crush, the momentum</div><div>could cause the lot to collapse sending you to the bottom fast.</div><div>Also with just the foam, it is more likely to degrade in time.</div><div>You may be wasting time & money if it doesn't stabilise you as you hope. </div><div>I still think my suggestion of tying various items to varying parts of the</div><div>sub is the quickest & cheapest solution. You could use 20 litre plastic</div><div>containers with handles, inflatable objects etc & anything heavy. </div><div>Come with a truck load of items & divers to place the items & swing on </div><div>the conning tower (test stability). Video the proceedings & weigh every</div><div>thing later after you have it right. Any floatation devices you can hang weights</div><div>off to check their floatation, after the cranes gone.</div><div>It took me ages getting my ambient sub right. You think you've got it right,</div><div>fail & go back home & melt some more lead :(</div><div>Alan </div><div><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 type="cite"><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" style=""><font face="Arial, sans-serif">Hi All,</font></font></div><font size="2" style=""><font face="Arial, sans-serif"><div><font size="2" style=""><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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