<html><head></head><body><div style="color:#000; background-color:#fff; font-family:Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:13px"><div id="yui_3_16_0_1_1497312421192_17667"><span>Sean,</span></div><div id="yui_3_16_0_1_1497312421192_17667" dir="ltr"><span>Thank you. I can's see the contact pressure being any big deal when you consider how little buoyancy is produced. I would think the issue would be motion from travel down the road. My thought was to </span>fill 4 inch plastic pipe with micro spheres. With the small diameter pipe, the contact from upward force on the spheres would be minimal. After considering this idea further, I would not use oil but water with a filtered vent for compensation. By using water I would loose some buoyancy but it would allow me to drain each of the ten tubes into a vat to separate the failed spheres and replace them with buoyant spheres. This could be done after each dive until a failure rate was established, if, there is a failure rate. It could end up being an annual process like changing the WD 40 in the motors. If this could work it would cost 1,500 dollars and that is buying it at small quantity pricing. </div><div id="yui_3_16_0_1_1497312421192_17667" dir="ltr"><br></div><div id="yui_3_16_0_1_1497312421192_17667" dir="ltr">Is there a safety margin established for buoyancy material?</div><div id="yui_3_16_0_1_1497312421192_17667" dir="ltr">Hank</div><div id="yui_3_16_0_1_1497312421192_17667" dir="ltr"><br></div> <div class="qtdSeparateBR"><br><br></div><div class="yahoo_quoted" style="display: block;"> <div style="font-family: Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 13px;"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div dir="ltr"><font size="2" face="Arial"> On Monday, June 12, 2017 7:08 PM, David Colombo via Personal_Submersibles <personal_submersibles@psubs.org> wrote:<br></font></div> <br><br> <div class="y_msg_container"><div id="yiv7470121918"><div dir="ltr">Hi Guys, I sent an email last week and I think it may have not went thru. Anybody out there?<br><br clear="all"><div><div><div class="yiv7470121918gmail_signature"><div dir="ltr"><div>Best Regards,<br>David Colombo<br><img src="http://static.squarespace.com/static/533310a9e4b0fba62008a464/t/5339c1f2e4b041bac4e25d1b/1396294132055/?format=500w" width="200" height="110"><br>804 College Ave<br>Santa Rosa, CA. 95404<br>(707) 536-1424<br><a rel="nofollow" target="_blank" href="http://www.seaquestor.com/">www.SeaQuestor.com</a><br><br></div></div></div></div>
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