<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=utf-8"><meta name=Generator content="Microsoft Word 15 (filtered medium)"><style><!--
/* Font Definitions */
@font-face
{font-family:Helvetica;
panose-1:2 11 6 4 2 2 2 2 2 4;}
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
p.yiv5840040146msonormal, li.yiv5840040146msonormal, div.yiv5840040146msonormal
{mso-style-name:yiv5840040146msonormal;
mso-margin-top-alt:auto;
margin-right:0cm;
mso-margin-bottom-alt:auto;
margin-left:0cm;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
span.E-mailStijl26
{mso-style-type:personal-reply;
font-family:"Calibri",sans-serif;
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@page WordSection1
{size:612.0pt 792.0pt;
margin:70.85pt 70.85pt 70.85pt 70.85pt;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]--></head><body lang=NL link=blue vlink=purple style='word-wrap:break-word'><div class=WordSection1><p class=MsoNormal><span lang=EN-GB style='mso-fareast-language:EN-US'>Hank, for breathing the second stage needs a high capacity. For compensating just a few percent of it. <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB style='mso-fareast-language:EN-US'>BR, Emile<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b>Van:</b> Personal_Submersibles <personal_submersibles-bounces@psubs.org> <b>Namens </b>hank pronk via Personal_Submersibles<br><b>Verzonden:</b> vrijdag 15 januari 2021 13:14<br><b>Aan:</b> via Personal_Submersibles <personal_submersibles@psubs.org><br><b>Onderwerp:</b> Re: [PSUBS-MAILIST] regulator for compensating<o:p></o:p></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Helvetica",sans-serif'>Emile, thank you, I did some testing yesterday with the regulator in a pail of water and connected to the arm actuators. I removed the vent plug from the actuator to see how much air flows through the actuator. Only a very small amount of air comes out the vent port before the regulator free flows. I think that is due to the length of the small air lines to the actuators, plus there are wires in the hoses. I then put extension tubes on the regulator vent ports and tried it. There is a significant improvement in air flow coming out of the actuator vent port. <o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Helvetica",sans-serif'>The question is, do I need the increased air flow? given the amount of things being compensated.<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Helvetica",sans-serif'>Hank<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Helvetica",sans-serif'><o:p> </o:p></span></p></div></div><div id="yahoo_quoted_1697753792"><div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#26282A'>On Thursday, January 14, 2021, 11:21:55 PM MST, via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote: <o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#26282A'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#26282A'><o:p> </o:p></span></p></div><div><div id=yiv5840040146><div><div><p class=yiv5840040146msonormal><span style='font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#26282A'>Hank,<o:p></o:p></span></p><p class=yiv5840040146msonormal><span style='font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#26282A'> <o:p></o:p></span></p><p class=yiv5840040146msonormal><span lang=EN-GB style='font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#26282A'>The lenght should be not a problem.You can create a small overpressure by placing the second stage as low as possible. Any water or condensation will be expelled during ascending as another advantage. Flow restriction sounds ok. </span><span style='font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#26282A'><o:p></o:p></span></p><p class=yiv5840040146msonormal><span lang=EN-GB style='font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#26282A'> </span><span style='font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#26282A'><o:p></o:p></span></p><p class=yiv5840040146msonormal><span lang=EN-GB style='font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#26282A'>Br,Emile</span><span style='font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#26282A'><o:p></o:p></span></p><p class=yiv5840040146msonormal><span lang=EN-GB style='font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#26282A'> </span><span style='font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#26282A'><o:p></o:p></span></p><div id=yiv5840040146yqt60148><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=yiv5840040146msonormal><b><span style='font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#26282A'>Van:</span></b><span style='font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#26282A'> Personal_Submersibles <<a href="mailto:personal_submersibles-bounces@psubs.org">personal_submersibles-bounces@psubs.org</a>> <b>Namens </b>hank pronk via Personal_Submersibles<br><b>Verzonden:</b> donderdag 14 januari 2021 21:16<br><b>Aan:</b> Personal Submersibles General Discussion <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br><b>Onderwerp:</b> [PSUBS-MAILIST] regulator for compensating<o:p></o:p></span></p></div></div><p class=yiv5840040146msonormal><span style='font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#26282A'> <o:p></o:p></span></p><div><div><p class=yiv5840040146msonormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:#26282A'>HI All, I have been playing around with and installing a first and second stage regulator on my ROV to compensate the arm etc. Alan has raised a very valid concern. The pressure differential between intake and exhaust is very slight and make me think the air may not make it to the arm motors. Alan has suggested extending the exhaust ports to create more back pressure. I was also thinking about restricting the volume allowed to exhaust, so if it free flows the restriction will help close the exhaust valve. </span><span style='font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#26282A'><o:p></o:p></span></p></div><div><p class=yiv5840040146msonormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:#26282A'>Any thoughts on the matter?</span><span style='font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#26282A'><o:p></o:p></span></p></div><div><p class=yiv5840040146msonormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:#26282A'>Hank</span><span style='font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#26282A'><o:p></o:p></span></p></div></div></div></div></div></div><div id=yqt06431><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#26282A'>_______________________________________________<br>Personal_Submersibles mailing list<br><a href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><o:p></o:p></span></p></div></div></div></div></div></body></html>