<html><body bgcolor="#FFFFFF"><div>I agree, bit wear. And tear can cause weeping and it will weep to the path of least resistance. Just something to keep on mind for those experimenting for the first time (or thereabouts).</div><div>Vance<br><br>Sent from my iPhone</div><div><br>On Sep 19, 2013, at 4:27 PM, hank pronk <<a href="mailto:hanker_20032000@yahoo.ca">hanker_20032000@yahoo.ca</a>> wrote:<br><br></div><div></div><blockquote type="cite"><div><div style="color:#000; background-color:#fff; font-family:tahoma, new york, times, serif;font-size:12pt"><div style="RIGHT: auto"><span style="RIGHT: auto">Vance,</span></div>
<div style="FONT-SIZE: 16px; FONT-FAMILY: tahoma, new york, times, serif; RIGHT: auto; COLOR: rgb(0,0,0); FONT-STYLE: normal; BACKGROUND-COLOR: transparent"><span style="RIGHT: auto">Agreed, but there is a way to avoid this without compensation. You must use cheap hydraulic cylinders because they use an o-ring on the shaft instead of a wiper seal. A wiper seal needs pressure on one side to seal against water intrusion. With an o-ring seal that is not the case, an o-ring is a non directional seal. Essentially the hydraulic cylinder with an o-ring seal is exactly the same as a reach rod sealing system. <var id="yui-ie-cursor"></var></span></div>
<div style="FONT-SIZE: 16px; FONT-FAMILY: tahoma, new york, times, serif; RIGHT: auto; COLOR: rgb(0,0,0); FONT-STYLE: normal; BACKGROUND-COLOR: transparent"><span style="RIGHT: auto">Hank</span></div>
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<div class="hr" style="FONT-SIZE: 0px; BORDER-TOP: #ccc 1px solid; HEIGHT: 0px; BORDER-RIGHT: #ccc 1px solid; BORDER-BOTTOM: #ccc 1px solid; PADDING-BOTTOM: 0px; PADDING-TOP: 0px; PADDING-LEFT: 0px; MARGIN: 5px 0px; BORDER-LEFT: #ccc 1px solid; LINE-HEIGHT: 0; PADDING-RIGHT: 0px" readonly="true" contenteditable="false"></div><font size="2" face="Arial"><b><span style="FONT-WEIGHT: bold">From:</span></b> "<a href="mailto:vbra676539@aol.com">vbra676539@aol.com</a>" <<a href="mailto:vbra676539@aol.com">vbra676539@aol.com</a>><br><b><span style="FONT-WEIGHT: bold">To:</span></b> <a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a> <br><b><span style="FONT-WEIGHT: bold">Sent:</span></b> Thursday, September 19, 2013 9:10:55 AM<br><b><span style="FONT-WEIGHT: bold">Subject:</span></b> Re: [PSUBS-MAILIST] hydraulics<br></font></div>
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<div><font style="BACKGROUND-COLOR: transparent">Hank and all,</font></div>
<div>The issue is overall system pressure versus ambient pressure. If you have a hydraulic unit that builds pressure only when it is activated, and returns to zero when static, then any, and I mean ANY leak point will allow water to creep into your oil. A spring loaded compensator preset to your max ambient plus a little would mitigate that by maintaining system pressure at whatever you set it for.</div>
<div>Vance</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: arial, helvetica; COLOR: black">-----Original Message-----<br>From: hank pronk <<a href="mailto:hanker_20032000@yahoo.ca">hanker_20032000@yahoo.ca</a>><br>To: Personal Submersibles General Discussion <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br>Sent: Thu, Sep 19, 2013 3:22 am<br>Subject: Re: [PSUBS-MAILIST] hydraulics<br><br>
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<div><span>H Alan,</span></div>
<div style="FONT-SIZE: 16px; FONT-FAMILY: tahoma, new york, times, serif; COLOR: rgb(0,0,0); FONT-STYLE: normal; BACKGROUND-COLOR: transparent"><span>Bicycle brakes would probably work quite well because they are made from very good material. </span></div>
<div style="FONT-SIZE: 16px; FONT-FAMILY: tahoma, new york, times, serif; COLOR: rgb(0,0,0); FONT-STYLE: normal; BACKGROUND-COLOR: transparent"><span>Hank<var id="yiv5104759659yui-ie-cursor"></var></span></div>
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<div class="yiv5104759659hr" style="FONT-SIZE: 0px; BORDER-TOP: rgb(204,204,204) 1px solid; HEIGHT: 0px; BORDER-RIGHT: rgb(204,204,204) 1px solid; BORDER-BOTTOM: rgb(204,204,204) 1px solid; PADDING-BOTTOM: 0px; PADDING-TOP: 0px; PADDING-LEFT: 0px; MARGIN: 5px 0px; BORDER-LEFT: rgb(204,204,204) 1px solid; LINE-HEIGHT: 0; PADDING-RIGHT: 0px"></div><font size="2" face="Arial"><b><span style="FONT-WEIGHT: bold">From:</span></b> Alan <<a href="mailto:alanlindsayjames@yahoo.com" rel="nofollow" target="_blank" ymailto="mailto:alanlindsayjames@yahoo.com"><a href="mailto:alanlindsayjames@yahoo.com">alanlindsayjames@yahoo.com</a></a>><br><b><span style="FONT-WEIGHT: bold">To:</span></b> Personal Submersibles General Discussion <<a href="mailto:personal_submersibles@psubs.org" rel="nofollow" target="_blank" ymailto="mailto:personal_submersibles@psubs.org"><a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a></a>> <br><b><span style="FONT-WEIGHT: bold">Sent:</span></b> Wednesday, September 18, 2013 11:55:49 PM<br><b><span style="FONT-WEIGHT: bold">Subject:</span></b> Re: [PSUBS-MAILIST] hydraulics<br></font></div>
<div class="yiv5104759659y_msg_container"><br>Hi Brian,<br>I've wondered about this also.<br>I was looking at the hydraulic brakes they have on bicycles now days &<br>wondering if you could adapt them for functions like releasing emergency<br>bouys or similar. The manual hydraulics they have on boats, like steering units<br>are pretty expensive. Would be good to find something of suitable material<br>off the shelf hat could be used.<br>Alan<br>.<br>Sent from my iPad<br><br>On 16/09/2013, at 5:28 AM, "brian" <<a href="mailto:brian@ojaivalleybeefarm.com" rel="nofollow" target="_blank" ymailto="mailto:brian@ojaivalleybeefarm.com"><a href="mailto:brian@ojaivalleybeefarm.com">brian@ojaivalleybeefarm.com</a></a>> wrote:<br><br>> I wonder if those human powered hydraulics could have an application for our boats, like the cats in the America's cup.<br>> <br>> Brian<br>> _______________________________________________<br>> Personal_Submersibles mailing list<br>> <a href="mailto:Personal_Submersibles@psubs.org" rel="nofollow" target="_blank" ymailto="mailto:Personal_Submersibles@psubs.org"><a href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a></a><br>> <a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" rel="nofollow" target="_blank"><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a></a><br><br>_______________________________________________<br>Personal_Submersibles mailing list<br><a href="mailto:Personal_Submersibles@psubs.org" rel="nofollow" target="_blank" ymailto="mailto:Personal_Submersibles@psubs.org"><a href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a></a><br><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" rel="nofollow" target="_blank"><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a></a><br><br><br></div></div></div></div></div></div>
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