<table cellspacing="0" cellpadding="0" border="0"><tr><td valign="top">Hank,<br/><br/>Is that 25% of input energy for the same output? <br/><br/>Where is the loss, this is not my area.<br/><br/>Just mentioning it because of the choice of Alvin's systems.<br/><br/>Joe<br/><br/>Sent from Yahoo! Mail for iPad</td></tr></table> <div id="_origMsg_">
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hank pronk <hanker_20032000@yahoo.ca>; <br>
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Personal Submersibles General Discussion <personal_submersibles@psubs.org>; <br>
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Re: [PSUBS-MAILIST] Thrusters, Air & Diesel Musings <br>
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Sun, Oct 13, 2013 2:37:10 AM <br>
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<td valign="top"><div style="color:#000;background-color:#fff;font-family:tahoma, new york, times, serif;font-size:12pt;"><div style=""><span style="">Joe,</span></div>
<div style=""><span style="">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=""><span style="">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=""><span style="">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;"></div><font size="2" face="Arial"><b><span style="FONT-WEIGHT:bold;">From:</span></b> Joe Perkel <josephperkel@yahoo.com><br clear="none"><b><span style="FONT-WEIGHT:bold;">To:</span></b> Psubbers Mailist <personal_submersibles@psubs.org> <br clear="none"><b><span style="FONT-WEIGHT:bold;">Sent:</span></b> Saturday, October 12, 2013 6:17:20 PM<br clear="none"><b><span style="FONT-WEIGHT:bold;">Subject:</span></b> [PSUBS-MAILIST] Thrusters, Air & Diesel Musings<br clear="none"></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 rel="nofollow" shape="rect" target="_blank" href="http://www.nextgenerationpower.com/Info/Support/3-5Specs.pdf">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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