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<DIV>
<DIV>Guys, some of our grief with cooling outrunner motors is being remedied by
the manufacturer. They are beginning to install fans in the motor to pull
air through them.... I believe Plettenburg is now doing this on
their Extra 30-10.</DIV>
<DIV> </DIV>
<DIV>Rex Lesher</DIV>
<BLOCKQUOTE
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV style="FONT: 10pt arial"><B>From:</B> <A
title=mailto:jeffghughes@comcast.net
href="mailto:jeffghughes@comcast.net">jeffghughes@comcast.net</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=mailto:nsrca-discussion@lists.nsrca.org
href="mailto:nsrca-discussion@lists.nsrca.org">NSRCA Mailing List</A> ; <A
title=mailto:nsrca-discussion@lists.nsrca.org
href="mailto:nsrca-discussion@lists.nsrca.org">nsrca-discussion@lists.nsrca.org</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Tuesday, March 28, 2006 6:00
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [NSRCA-discussion] Reducing
the odds...</DIV>
<DIV><BR></DIV>
<DIV>Matt,</DIV>
<DIV>Your missing my point. I have never doubted that a "properly"
designed duct can increase cooling. I just doubt that most modelers
have "properly" designed duct work in their planes. The ducts we make
increase cooling over not having any duct work, but I've built and flown
a lot of planes with engines and motors un-cowled that didn't overheat either!
My initial statement was around uncowled outrunner motors. Why not have
them up front and exposed? Save a lot of grief and might just look good (or
not, it just might look industrial). We as pattern folks always seem to
do the harder right, instead of the easier right.</DIV>
<DIV> </DIV>
<DIV>Jeff</DIV>
<DIV> </DIV>
<DIV> </DIV>
<BLOCKQUOTE
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">--------------
Original message -------------- <BR>From: rcmaster199@aol.com <BR>
<DIV style="FONT-SIZE: 10pt; FONT-FAMILY: 'Verdana'">
<DIV>
<DIV>Jeff, how do you increase air velocity around the motor with no
increase in model airspeed? </DIV>
<DIV>Here's where our old friend Bernoulli comes in, stage left. </DIV>
<DIV> </DIV>
<DIV>And BTW, the properly designed ENTRY into and EXIT from the
ducting really increases the ducting efficiency. </DIV>
<DIV> </DIV>
<DIV>Cheers,</DIV>
<DIV>Matt</DIV> <BR>-----Original Message-----<BR>From:
jeffghughes@comcast.net<BR>To: NSRCA Mailing List
<nsrca-discussion@lists.nsrca.org>; NSRCA Mailing List
<nsrca-discussion@lists.nsrca.org><BR>Sent: Tue, 28 Mar 2006 22:10:39
+0000<BR>Subject: Re: [NSRCA-discussion] Reducing the odds...<BR><BR>
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<DIV id=AOLMsgPart_3_aec4f8b8-9de4-43e2-bb47-06284fcf57d8>
<DIV>While I agree good ducting can be better than hanging out there, I
seriously doubt if most modelers do any better than hanging it out. Plus I
think an outrunner all polished up woul look pretty cool with the fuse
faired into it. </DIV>
<DIV> </DIV>
<BLOCKQUOTE
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">--------------
Original message -------------- <BR>From: "Dean Pappas"
<d.pappas@kodeos.com> <BR>
<DIV><SPAN class=504561818-28032006><FONT face=Arial color=#0000ff
size=2>Good ducting is better than hanging in the breeze, and a whole lot
prettier.</FONT></SPAN></DIV>
<DIV> </DIV>
<DIV><FONT face="Times New Roman">Dean Pappas</FONT> <BR><FONT
face="Times New Roman">Sr. Design Engineer</FONT> <BR><FONT
face="Times New Roman">Kodeos Communications</FONT> <BR><FONT
face="Times New Roman">111 Corporate Blvd.</FONT> <BR><FONT
face="Times New Roman">South Plainfield, N.J. 07080</FONT> <BR><FONT
face="Times New Roman">(908) 222-7817 phone</FONT> <BR><FONT
face="Times New Roman">(908) 222-2392 fax</FONT> <BR><FONT
face="Times New Roman">d.pappas@kodeos.com</FONT> </DIV>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B>
nsrca-discussion-bounces@lists.nsrca.org
[mailto:nsrca-discussion-bounces@lists.nsrca.org]<B>On Behalf Of
</B>jeffghughes@comcast.net<BR><B>Sent:</B> Tuesday, March 28, 2006
12:49 PM<BR><B>To:</B> NSRCA Mailing List; NSRCA Mailing
List<BR><B>Subject:</B> Re: [NSRCA-discussion] Reducing the
odds...<BR><BR></FONT></DIV>
<DIV>I was thinking about this the other day. Why don't we change the
fuse design to stick the motor out in the breeze? Kind of like a WWI
rotary or a foamy. Seems like we're trying hard to keep the planes
identical in design between electrics and fuel for no apparent
reasons</DIV>
<DIV> </DIV>
<DIV>Also now that huge props and braking are available, will fuselages
slim down some?</DIV>
<DIV> </DIV>
<BLOCKQUOTE
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">--------------
Original message -------------- <BR>From: "Dean Pappas"
<d.pappas@kodeos.com> <BR><BR>> Hi Earl, <BR>> This sounds
a whole lot loke the similar duct I have placed around my AXI <BR>>
outrunner. <BR>> It is astounding how much a difference a real
cooling duct makes. <BR>> Fans inside the motor are a band-aid. The
top-down solution is good airflow <BR>> management. <BR>>
<BR>> The picture is of the ductwork in the Funtana I am doing for
FM. <BR>> The subject is modifying the plane for high-performance
electric. (high heat and <BR>> RF generation) <BR>> The airbox
in the front of the cowl encloses the front of the motor, <BR>> and
feeds the internals and the 1/8" gap in the duct with high pressure
air. <BR>> <BR>> <BR>> later, <BR>> Dean <BR>> <BR>>
Dean Pappas <BR>> </BLOCKQUOTE></BLOCKQUOTE></BLOCKQUOTE></! ?? ht!
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<TR vAlign=top>
<TD class=FieldLabel noWrap>From:</TD>
<TD class=FieldValue>Dean Pappas <d.pappas@kodeos.com></TD></TR>
<TR vAlign=top>
<TD class=FieldLabel>To:</TD>
<TD class=FieldValue>NSRCA Mailing List
<nsrca-discussion@lists.nsrca.org></TD></TR>
<TR vAlign=top>
<TD class=FieldLabel>Subject:</TD>
<TD class=FieldValue>Re: [NSRCA-discussion] Reducing the odds...</TD></TR>
<TR vAlign=top>
<TD class=FieldLabel>Date:</TD>
<TD class=FieldValue>Tue, 28 Mar 2006 18:19:00
+0000</TD></TR></TBODY></TABLE></DIV>
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