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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Hi Alan,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>I am happy with the rotating
thruster configuration on the Nordicsub boats.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>Indeed you can double the
power and you have a backup when the stern drive fails.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>When manoeuvring over the
bottom , the thrusters are pointing about 45 deg. Downward. As we dive the boat
a little positive buoyant, you can push the sub both forward and downward.<o:p></o:p></span></font></p>
<p class=MsoNormal><st1:metricconverter ProductID="10 Kg" w:st="on"><font
size=2 color=navy face=Arial><span lang=EN-GB style='font-size:10.0pt;
font-family:Arial;color:navy'>10 Kg</span></font></st1:metricconverter><font
size=2 color=navy face=Arial><span lang=EN-GB style='font-size:10.0pt;
font-family:Arial;color:navy'> thrust per Ton is a good rule of thumb value.. the
Rotorque thrusters are still going strong after 100 op. hours and non maintenance.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'>Regards, Emile<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>Van:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
Personal_Submersibles [mailto:personal_submersibles-bounces@psubs.org] <b><span
style='font-weight:bold'>Namens </span></b>Alan via Personal_Submersibles<br>
<b><span style='font-weight:bold'>Verzonden:</span></b> zondag 28 september
2014 11:40<br>
<b><span style='font-weight:bold'>Aan:</span></b> Personal Submersibles General
Discussion<br>
<b><span style='font-weight:bold'>Onderwerp:</span></b> Re: [PSUBS-MAILIST]
thruster sizing etc</span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Thanks Alec that was helpful.<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Is that the normal mode of operation, having the side thrusters locked<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>vertical? Were you putting them in reverse or just relying on positive
buoyancy.<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>I was planning on having side thrusters that are rotated by electric
motors, so my <o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>hands are just on a couple of joy sticks controlling all the motor
functions.<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>I liked the idea of using rotating side thrusters so that I could have
double the power travelling<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>horizontally if need be. Also there would be no need to ramp the motors
down to change <o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>from forward to reverse.<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Any thoughts on the pros or cons of this anyone?<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Alan<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><br>
Sent from my iPad<o:p></o:p></span></font></p>
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<p class=MsoNormal style='margin-bottom:12.0pt'><font size=3
face="Times New Roman"><span style='font-size:12.0pt'><br>
On 28/09/2014, at 4:55 pm, Alec Smyth via Personal_Submersibles <<a
href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>>
wrote:<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Hi Alan,<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>On the stern, snoopy has a <st1:metricconverter ProductID="55 lb"
w:st="on">55 lb</st1:metricconverter> Minnkota. The side thrusters are actually
of unknown thrust, they came with Snoopy and are Motorguides but I'm not exactly
sure which model. My estimate would be about <st1:metricconverter
ProductID="40 lbs" w:st="on">40 lbs</st1:metricconverter> (each). What you saw
in Florida would have been forward motion based on the stern thruster alone, as
I was using the side thrusters just for depth keeping, locked vertical. The
K250 has very limited battery capacity, carrying three batteries in the
standard design and four in Snoopy. I find the thrusters well proportioned to
the limited battery capacity. The bottom line is that a K250 has perfectly
adequate thrusters and batteries for diving, but not enough for surface runs.
Something in the league of Minnkota 101s is great, but only on subs with
battery pods.<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Best,<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><br>
Alec <o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>On Sat, Sep 27, 2014 at 8:17 AM, Alan via Personal_Submersibles <<a
href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>>
wrote:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Alec,<br>
what size motors do you have on Snoopy?<br>
I remember watching you disappear into the blue surprisingly quickly in
Florida.<br>
Were you using the stern & side thrusters simultaneously?<br>
Are you happy with the speed?<br>
I have spent a LOT of time Googling brushless motors & haven't come up with<br>
an easy solution.<br>
I was looking particularly at inrunner motors, as they have a couple of
advantages<br>
over outrunners, however outrunners have lower revs. Whatever, they are both
going<br>
to need gearing down majorly & matching up with a planetary gear isn't
looking easy.<br>
Most of the motors that are available are found at Hobby King & are
lightweight & made<br>
mainly for model planes. So their strength & ability to sustain several hours
of<br>
continual operation are in question.<br>
Must be a solution out there because 9 out of 10 thruster manufacturers are
using brushless motors & I doubt they would be making there own.<br>
Alan<br>
<br>
<br>
<br>
Sent from my iPad<br>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
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