<html><body><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">Joe,</SPAN></div>
<div style="RIGHT: auto"><SPAN style="RIGHT: auto">I am a lover of hydraulic anything. I am sure you can go hyd all around with no trouble. Problem is efficiency, they will rob 25%. If you want range, then its no good. If you launch from a ship and look around then it would not matter maybe. With seals the way they are now and magnetic couplers, electric still wins.</SPAN></div>
<div style="RIGHT: auto"><SPAN style="RIGHT: auto">I was looking on e bay and there is a magnetic coupler for a water pump that could be modified for our purposes. I like the idea but I have no real need to improve a sub that is perfect :-) Also my budget is hurtin bad.</SPAN></div>
<div style="RIGHT: auto"><SPAN style="RIGHT: auto">Hank<VAR id=yui-ie-cursor></VAR></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> Joe Perkel <josephperkel@yahoo.com><BR><B><SPAN style="FONT-WEIGHT: bold">To:</SPAN></B> Psubbers Mailist <personal_submersibles@psubs.org> <BR><B><SPAN style="FONT-WEIGHT: bold">Sent:</SPAN></B> Saturday, October 12, 2013 6:17:20 PM<BR><B><SPAN style="FONT-WEIGHT: bold">Subject:</SPAN></B> [PSUBS-MAILIST] Thrusters, Air & Diesel Musings<BR></FONT></DIV>
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<DIV>Some quick questions / observations / musing come to mind as I sit here editing <VAR id=yiv6534383925yui-ie-cursor></VAR>videos.</DIV>
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<DIV>It looks to me like Alvin's thrusters all have a 90 deg drive arrangement like yacht bow thrusters. Some of these off the <SPAN id=yiv6534383925misspell-0>shelf</SPAN> units are hydraulic, but way over powered for a Delta / Gamma sized sub. <SPAN id=yiv6534383925misspell-1><SPAN>There</SPAN></SPAN> are however, lots of little hydraulic motors out there, a slew of them. Ive also seen drive components, reductions, etc, that simply were not available to George. How much trouble would it be to go hydraulic all around? </DIV>
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<DIV>If DC motors must be used, in my view then the single must have improvement to the T-Rex design is the addition of a mag coupling.</DIV>
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<DIV><SPAN id=yiv6534383925misspell-2>Alecs</SPAN> <SPAN id=yiv6534383925misspell-3><SPAN>experience</SPAN></SPAN> has me rethinking self sufficiency. It would be nice to charge the batteries and the HP tanks independent of a surface boat, eliminating the need to raft alongside in swells. All this <SPAN id=yiv6534383925misspell-4><SPAN>convenience</SPAN></SPAN> means a "Tours 66" type of arrangement. But Tours 66 weighed in at 10 tons.</DIV>
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<DIV>Everything is now downsized like that little AC unit I posted,.. take a look at this marine gen-set (note dimensions) <A href="http://www.nextgenerationpower.com/Info/Support/3-5Specs.pdf" rel=nofollow target=_blank>http://www.nextgenerationpower.com/Info/Support/3-5Specs.pdf</A> </DIV>
<DIV><SPAN id=yiv6534383925misspell-5>Hmm</SPAN>, could this not be enclosed in the hull during a build, or otherwise slung longways down the hatch into a 42" hull? No prop shaft and seals, (you still get towed) but <SPAN id=yiv6534383925misspell-6><SPAN>independent</SPAN></SPAN> re-<SPAN id=yiv6534383925misspell-7><SPAN>charge</SPAN></SPAN> capability for both batteries and HP air with an equally downsized compressor!?! </DIV>
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<DIV>So the question of the day is,...</DIV>
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<DIV>Is a comfy air conditioned & self sufficient research capable PSUB for sport diving in Florida / <SPAN id=yiv6534383925misspell-9><SPAN>Caribbean</SPAN></SPAN> waters, a realistic goal at around 3.5 tons and $8-$10 lb?</DIV>
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