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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'>Alan and others.<o:p></o:p></span></font></p>
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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 added a Kort nozzle to
the Haswing. Seems to work fine.<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'>It originates from a good
quality scuba dive scooter (Brand name Gavin) . I never measured but it comes
clos to a real Kort profile.<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'>Cost: abt. 200,-<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'>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>
<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'><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 James<br>
<b><span style='font-weight:bold'>Verzonden:</span></b> maandag 28 oktober 2013
8:32<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]
Group Help Request</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 style='background:white'><font size=2 color=black
face=Helvetica><span style='font-size:10.0pt;font-family:Helvetica;color:black'>Joe,<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=2 color=black face=Helvetica><span
style='font-size:10.0pt;font-family:Helvetica;color:black'>I was going to
suggest that Marc wade in on this subject, it is one of his fields<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=2 color=black face=Helvetica><span
style='font-size:10.0pt;font-family:Helvetica;color:black'>of expertise. I
believe he has written books on ducted fans etc.<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=2 color=black face=Helvetica><span
style='font-size:10.0pt;font-family:Helvetica;color:black'>Marc is a very
talented guy hidden away in an obscure corner of the Philippines.He may be a
helpful<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=2 color=black face=Helvetica><span
style='font-size:10.0pt;font-family:Helvetica;color:black'>source of
information if you want to get this right.<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=2 color=black face=Helvetica><span
style='font-size:10.0pt;font-family:Helvetica;color:black'>We sure have a
multi-talented group here.<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=2 color=black face=Helvetica><span
style='font-size:10.0pt;font-family:Helvetica;color:black'>Alan<o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=2 color=black face=Helvetica><span
style='font-size:10.0pt;font-family:Helvetica;color:black'><o:p> </o:p></span></font></p>
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<p class=MsoNormal style='background:white'><font size=2 color=black
face=Helvetica><span style='font-size:10.0pt;font-family:Helvetica;color:black'><o:p> </o:p></span></font></p>
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<p class=MsoNormal style='background:white'><b><font size=2 color=black
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:black;
font-weight:bold'>From:</span></font></b><font size=2 color=black face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:black'> Marc de Piolenc
<piolenc@archivale.com><br>
<b><span style='font-weight:bold'>To:</span></b> Personal Submersibles General
Discussion <personal_submersibles@psubs.org> <br>
<b><span style='font-weight:bold'>Sent:</span></b> Monday, October 28, 2013
7:57 PM<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [PSUBS-MAILIST] Group
Help Request</span></font><font color=black face=Helvetica><span
style='font-family:Helvetica;color:black'><o:p></o:p></span></font></p>
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face=Helvetica><span style='font-size:12.0pt;font-family:Helvetica;color:black'><br>
Quick clarification: a properly contoured Kort nozzle, MARRIED TO A <br>
MATCHING PROPELLER, will increase static and low-speed thrust. Of course <br>
it won't increase power, since that comes from your motor. If you just <br>
put a shroud around your existing prop, you will be disappointed, and a <br>
shroud that doesn't do the job is overpriced unless it's free! Key <br>
ingredients for success:<br>
<br>
Prop matched to the shroud<br>
Shroud matched to the speed and thrust requirement of the vehicle<br>
Motor matched to the resulting prop<br>
<br>
Marc<br>
<br>
On 10/28/2013 8:33 AM, Jon Wallace wrote:<br>
><br>
> What is the cost of having a true Kort nozzle machined by a CNC? I think<br>
> a 30% improvement in thrust for $30 would be great but I suspect<br>
> machining a Kort is going to equate to many hundreds of dollars, if not<br>
> reaching beyond a thousand. When I look at the Snoopy underwater
videos<br>
> it is difficult to imagine a kort nozzle really making any difference in<br>
> the operational experience given that the motors are operating very<br>
> slowly and pushing Snoopy around at about 2 knots (estimated). The<br>
> props are designed for power, but that's what we want underwater.
True,<br>
> a kort nozzle would increase that power but what is the return on the<br>
> cost? In other words, on a road with a speed limit of 30mph and no<br>
> passing zones it doesn't matter whether you have a <st1:metricconverter
ProductID="1.6 liter" w:st="on">1.6 liter</st1:metricconverter> or 5.4<br>
> liter engine under the hood does it?<br>
-- <br>
Archivale catalog: <a href="http://www.archivale.com/catalog" target="_blank"
shape=rect>http://www.archivale.com/catalog</a><br>
Polymath weblog: <a href="http://www.archivale.com/weblog" target="_blank"
shape=rect>http://www.archivale.com/weblog</a><br>
Translations (ProZ profile): <a href="http://www.proz.com/profile/639380"
target="_blank" shape=rect>http://www.proz.com/profile/639380</a><br>
Translations (BeWords profile): <a href="http://www.bewords.com/Marc-dePiolenc"
target="_blank" shape=rect>http://www.bewords.com/Marc-dePiolenc</a><br>
Ducted fans: <a href="http://massflow.archivale.com/" target="_blank"
shape=rect>http://massflow.archivale.com/</a><o:p></o:p></span></font></p>
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