<html><body><span style="font-family:Verdana; color:#000000; font-size:10pt;"><div>Hank,</div>
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<div>My thought was to have no hydraulic penetrators into the sub and to only have a subconn to run the manipulator. The pumps would be submerged in the hydraulic reservoir outside of the sub and would be pressure compensated. Good or bad idea?</div>
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<div>Thanks,<BR>Scott Waters </div>
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<DIV id=wmQuoteWrapper>-------- Original Message --------<BR>Subject: Re: [PSUBS-MAILIST] Manipulator Hydrolic question<BR>From: hank pronk via Personal_Submersibles<BR><<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><BR>Date: Mon, January 12, 2015 4:46 pm<BR>To: Personal Submersibles General Discussion<BR><<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><BR><BR>Scott,<BR>The pump runs the whole time the arm is in use. When you want to grab the gold filled chest, turn on the pump and use the arm then turn it off when your done. I would keep it simple, besides the arm functions are continuous. It probably takes less power to keep the pump running rather than start and stop constantly. You could use multiple small pumps that activate with each function, might be simpler in the end. No valve bank and less complicated.<BR>Hank<BR>--------------------------------------------<BR>On Mon, 1/12/15, via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<BR><BR>Subject: [PSUBS-MAILIST] Manipulator Hydrolic question<BR>To: "psubs" <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><BR>Received: Monday, January 12, 2015, 5:54 PM<BR><BR>Do<BR>most submarine manipulator arms have a pump for each<BR>cylinder controlled electronically from the inside of the<BR>sub or do they have one pump that is continuously running<BR>and hoses go in the sub and controlled with valves? Or<BR>perhaps another way? <BR> <BR>My excavators in my company have one pump that is<BR>engine driven and it runs continuously an the cylinders are<BR>actuated by valves. Seems impractical to me to have a<BR>battery driven pump that runs continuously. <BR> <BR>Thanks,<BR>Scott Waters<BR>-----Inline Attachment Follows-----<BR><BR>_______________________________________________<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">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><BR><BR><BR>_______________________________________________<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">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><BR></DIV></BLOCKQUOTE></span></body></html>