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<div><font face="Arial, Helvetica, sans-serif" size="3" style="background-color: transparent;">If I had never been on sub diving operations I would be working on designing a system for self-propelled surface transit, however since I have been on a few dive ops I have to agree completely with Jon on this one.</font></div>
<div><font size="3"></font> </div>
<div><font size="3">If I'm more than about 50 meters from shore I want a competent support boat occupied by an adequate number of smart people. Since you need a support boat anyway, having it tow the sub to the dive site is quicker, more efficient, less complex, and hopefully more comfortable. The less time you spend in route to the dive site the better, especially if the sub must be occupied in transit in either direction. Add hot weather to the mix and it becomes even more significant.</font></div>
<div><font size="3"></font> </div>
<div><font size="3">Something that might be helpful would be to design a tow sled (must be a better word) to attach to the front of the sub for better flow characteristics. It's analogous to a tow dolly for towing a vehicle behind a motor home. Most of the subs aren't very hydrodynamic, and something that would attach directly to the tow line and cut through the water better with even a little lift would be a great improvement.<font face="Arial, Helvetica, sans-serif"> Depending on the design it could also facilitate getting into and out of the sub at the dive site. That by itself would be worth it.</font></font></div>
<div><font size="3"></font> </div>
<div><font size="3">Jim</font></div>
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<div></div>
<div style="color: black; font-family: arial,helvetica; font-size: 10pt;">-----Original Message-----<br>
From: Jon Wallace <jonw@psubs.org><br>
To: Personal Submersibles General Discussion <personal_submersibles@psubs.org><br>
Sent: Fri, Nov 29, 2013 11:13 am<br>
Subject: Re: [PSUBS-MAILIST] Surface Transit and power requirements<br>
<br>
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Except for calm lake conditions I don't think a piggy-back generator
is practical. On open ocean it is not a simple task to support sub
dive ops. Take another look at the "psychedelic sub" video from
Islamorada this year and note the bobbing of the sub, the divers,
and the support boat in only 2 foot seas. Having been in that water
helping weight-balance Snoopy, I can't imagine trying to load/unload
a generator (even a small one) from the top of it.<br>
<br>
A small semi-rigid inflatable also won't be practical as surface
support in such conditions. Doug's 25 foot boston whaler was being
tossed pretty well and drifting heavily. Who wants to be 5 miles
out on the open ocean in a small cramped inflatable fighting wave,
wind and current?<br>
<br>
Jon<br>
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<hr size="1"> <font face="Arial" size="2"> <b><span style="font-weight: bold;">From:</span></b> Joe
Perkel <a class="moz-txt-link-rfc2396E" href="mailto:josephperkel@yahoo.com"><josephperkel@yahoo.com></a><br>
<b><span style="font-weight: bold;">To:</span></b>
Personal Submersibles General Discussion
<a class="moz-txt-link-rfc2396E" href="mailto:personal_submersibles@psubs.org"><personal_submersibles@psubs.org></a> <br>
<b><span style="font-weight: bold;">Sent:</span></b>
Thursday, November 28, 2013 3:43 PM<br>
<b><span style="font-weight: bold;">Subject:</span></b>
[PSUBS-MAILIST] Surface Transit and power requirements<br>
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<div id="yiv8084797658yui_3_13_0_ym1_1_1385606489934_3432"><br id="yiv8084797658yui_3_13_0_ym1_7_1385606489934_4">
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<div id="yiv8084797658yui_3_13_0_ym1_1_1385606489934_3469" style="margin: 0in 0in 10pt;"><span id="yiv8084797658yui_3_13_0_ym1_1_1385606489934_3471" style="line-height: 115%; font-size: 12pt;"><font id="yiv8084797658yui_3_13_0_ym1_1_1385606489934_3470" face="Calibri">I
have a
question on my mind that I’d like to
pose for ideas. It concerns primary
propulsion and the potential use of an
electric golf cart motor for long
distance surface transit say in the
order of 4 to 5 miles one way.</font></span></div>
<div style="margin: 0in 0in 10pt;"><span style="line-height: 115%; font-size: 12pt;"></span> </div>
<div style="margin: 0in 0in 10pt;"><span style="line-height: 115%; font-size: 12pt;"><font face="Calibri">What I am
thinking is the use of a motor pod ahead
of a moveable rudder Delta style. If
one were to use say a 5hp motor where
2-3 hp is required, wouldn’t the larger
motor be less taxed and run cooler, turn
a larger prop, <span> </span>be more
reliable long term, etc?</font></span></div>
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<div style="margin: 0in 0in 10pt;"><span style="line-height: 115%; font-size: 12pt;"><font face="Calibri">As for power
drain, what if a portable Honda
generator could ride temporarily on deck
behind
the sail in a purpose built ventilated
enclosure that is quick release
removable.
Could this not be connected to a purpose
built electrical thru hull feeding the
main bus?</font></span></div>
<div id="yiv8084797658yui_3_13_0_ym1_1_1385606489934_3432"><font face="Times New Roman" size="3">
</font></div>
<div style="margin: 0in 0in 10pt;"><span style="line-height: 115%; font-size: 12pt;"><font face="Calibri">My goals
here are simple.</font></span></div>
<div id="yiv8084797658yui_3_13_0_ym1_1_1385606489934_3432"><font face="Times New Roman" size="3">
</font></div>
<div id="yiv8084797658yui_3_13_0_ym1_1_1385606489934_3459" style="margin: 0in 0in 0pt 0.5in;"><span style="line-height: 115%; font-size: 12pt;"><span><font face="Calibri">1)</font><span style='font: 7pt/normal "Times New Roman";'> </span></span></span><span id="yiv8084797658yui_3_13_0_ym1_1_1385606489934_3458" style="line-height: 115%; font-size: 12pt;"><font id="yiv8084797658yui_3_13_0_ym1_1_1385606489934_3457" face="Calibri">The
ability to travel to relative distant
dive sites with relative ease</font></span></div>
<div id="yiv8084797658yui_3_13_0_ym1_1_1385606489934_3432"><font face="Times New Roman" size="3">
</font></div>
<div id="yiv8084797658yui_3_13_0_ym1_1_1385606489934_3463" style="margin: 0in 0in 0pt 0.5in;"><span style="line-height: 115%; font-size: 12pt;"><span><font face="Calibri">2)</font><span style='font: 7pt/normal "Times New Roman";'> </span></span></span><span id="yiv8084797658yui_3_13_0_ym1_1_1385606489934_3462" style="line-height: 115%; font-size: 12pt;"><font face="Calibri">Reducing a surface
support
requirement to a small semi-rigid
inflatable.</font></span></div>
<div id="yiv8084797658yui_3_13_0_ym1_1_1385606489934_3432"><font face="Times New Roman" size="3">
</font></div>
<div style="margin: 0in 0in 0pt 0.5in;"><span style="line-height: 115%; font-size: 12pt;"><span><font face="Calibri">3)</font><span style='font: 7pt/normal "Times New Roman";'> </span></span></span><span style="line-height: 115%; font-size: 12pt;"><font face="Calibri">The ability to satisfy
power drain
and on site recharge capability without
rafting at sea.</font></span></div>
<div id="yiv8084797658yui_3_13_0_ym1_1_1385606489934_3432"><font face="Times New Roman" size="3">
</font></div>
<div style="margin: 0in 0in 10pt 0.5in;"><span style="line-height: 115%; font-size: 12pt;"><span><font face="Calibri">4)</font><span style='font: 7pt/normal "Times New Roman";'> </span></span></span><span style="line-height: 115%; font-size: 12pt;"><font face="Calibri">Eliminating the
complexity and costs
associated with inboard diesel
propulsion.</font></span></div>
<div id="yiv8084797658yui_3_13_0_ym1_1_1385606489934_3432"><font face="Times New Roman" size="3">
</font></div>
<div style="margin: 0in 0in 10pt;"><span style="line-height: 115%; font-size: 12pt;"><font face="Calibri">Ideas /
thoughts?</font></span></div>
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<div style="margin: 0in 0in 10pt;"><span style="line-height: 115%; font-size: 12pt;"><font face="Calibri">Joe</font></span></div>
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