<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=Content-Type content=text/html;charset=UTF-8>
<META content="MSHTML 6.00.6000.16640" name=GENERATOR></HEAD>
<BODY text=#000000 bgColor=#ffffff>
<DIV><FONT face=Arial size=2>Stuart,</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>The regular motor is about 1/2" shorter than the
comp.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Ken</FONT></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="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=schale@optonline.net href="mailto:schale@optonline.net">Stuart
Chale</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=nsrca-discussion@lists.nsrca.org
href="mailto:nsrca-discussion@lists.nsrca.org">General pattern discussion</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Monday, August 31, 2009 9:51
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [NSRCA-discussion] Hacker
Comp overheating</DIV>
<DIV><BR></DIV>The pencil line is straight, and it is a kevlar wound
magnet. I will call Hacker tomorrow and I am sure they will say send it
in. The input wire could be an issue. I always noticed that if the
wires were bent wrong it would cause friction to keep the motor from easily
spinning.<BR>I guess I will just have to fly the Pinnacle for a while, or
switch that motor to my Beryll. Does the reg Hacker swap for the comp
model or are spacings different?<BR><BR>Earl Haury wrote:
<BLOCKQUOTE cite=mid:F5FE12DFBC254C5DBE586DFA7DE8C552@EarlPC type="cite">
<META content="MSHTML 8.00.6001.18813" name=GENERATOR>
<DIV><FONT face=Arial>Stuart</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial>As this is a change from the norm, it's apparent that
something has changed with the motor. Higher temp is usually associated
with higher load (more watts) which doesn't appear to be the case. A clue
might be in the missing fan disc, I doubt that the change in fan efficiency
is at fault due to the rapid temp rise. But, you might check the windings
for damage from debris, as clearances are close between the rotor and the
windings. <FONT face=Arial>You mention that the rotor doesn't have
separated magnets. I assume that this rotor has the Kevlar thread outer
winding. There's usually a pencil line drawn on the covering for
the length of the rotor - ensure that the line is straight. If
some magnet discs "slip" they may not develop a gap, but
the pencil line will be discontinuous.</FONT> (Although usually
slipped disc symptoms are higher amps as well as temp.)</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial>Another possibility is a partially broken motor input
wire, the high resistance in one "phase" will imbalance the load on the
windings and quickly generate more heat. (I've found it worthwhile to tie
the motor wires together to minimize flexing.)</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial>Good luck</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial>Ear</FONT></DIV>
<BLOCKQUOTE
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: rgb(0,0,0) 2px solid; MARGIN-RIGHT: 0px">
<DIV
style="FONT: 10pt arial; font-size-adjust: none; font-stretch: normal">-----
Original Message ----- </DIV>
<DIV
style="BACKGROUND: rgb(228,228,228) 0% 50%; FONT: 10pt arial; font-size-adjust: none; font-stretch: normal; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial"><B>From:</B>
<A title=schale@optonline.net href="mailto:schale@optonline.net"
moz-do-not-send="true">Stuart Chale</A> </DIV>
<DIV
style="FONT: 10pt arial; font-size-adjust: none; font-stretch: normal"><B>To:</B>
<A title=nsrca-discussion@lists.nsrca.org
href="mailto:nsrca-discussion@lists.nsrca.org"
moz-do-not-send="true">General pattern discussion</A> </DIV>
<DIV
style="FONT: 10pt arial; font-size-adjust: none; font-stretch: normal"><B>Sent:</B>
Monday, August 31, 2009 8:41 PM</DIV>
<DIV
style="FONT: 10pt arial; font-size-adjust: none; font-stretch: normal"><B>Subject:</B>
Re: [NSRCA-discussion] Hacker Comp overheating</DIV>
<DIV><BR></DIV>It has been in the same plane for 2 years. Never
noticed it getting this hot before. I know the last time I checked
(in hotter weather) it was not this hot.<BR>Stuart<BR><BR>Vicente "Vince"
Bortone wrote:
<BLOCKQUOTE
cite=mid:459021957.1246341251768662558.JavaMail.root@sz0152a.emeryville.ca.mail.comcast.net
type="cite">
<STYLE type=text/css>P {
MARGIN: 0px
}
</STYLE>
<DIV style="FONT-SIZE: 12pt; COLOR: rgb(0,0,0); FONT-FAMILY: Arial">
<P>Stuart,</P>
<P> </P>
<P>How long you have been running the motor? Did you measure the
temperature? It will be good idea to duct air to the back of the
motor. If you don't have any ducting I suggest that you install
some. Air from the duct should blow as close as possible to the
motor. Probably you already did all this but I am not sure.
Also need to make sure that has enough exhaust opening to allow the hot
air to exhaust the fuselage. I am sure that you will get more
suggestions.</P>
<P> </P>
<P>Good luck,<BR><BR>Vicente "Vince" Bortone<BR><BR>----- Original
Message -----<BR>From: "Stuart Chale" <A class=moz-txt-link-rfc2396E
href="mailto:schale@optonline.net"
moz-do-not-send="true"><schale@optonline.net></A><BR>To: "General
pattern discussion" <A class=moz-txt-link-rfc2396E
href="mailto:nsrca-discussion@lists.nsrca.org"
moz-do-not-send="true"><nsrca-discussion@lists.nsrca.org></A><BR>Sent:
Monday, August 31, 2009 7:13:08 PM GMT -06:00 US/Canada
Central<BR>Subject: [NSRCA-discussion] Hacker Comp overheating<BR><BR>I
have a hacker 14XL Comp model that started overheating this weekend.
<BR>I was hoping it just needed some grease. Pulled it apart
tonight and <BR>grease was still present (black as usual.
Regreasing time was near.) <BR>Cleaned it up and pulled the
front housing off. First thing I noticed <BR>was that the bottom
portion of the fan (the phenolic disk) was missing. <BR>Some dust
in the motor so I think it just got chewed up spit out or part <BR>of it
ground to dust. Pulled the rotor and the magnet looks fine.
I <BR>had a standard model where the magnet split part way down
and was <BR>pulling higher amps. Bearings fit the shaft freely, no
play but slid on <BR>easily and seemed smooth. Put it back
together regreased. Ran it up <BR>with a 21 x 13W APC pulled 67
amps 2300 watts at WOT but after a minute <BR>or so of 3 15 to 20 second
full throttle bursts the motor was hot <BR>again. Too hot to hold
your hand around it.<BR><BR>Any
ideas?<BR>Thanks,<BR>Stuart<BR><BR>_______________________________________________<BR>NSRCA-discussion
mailing list<BR><A class=moz-txt-link-abbreviated
href="mailto:NSRCA-discussion@lists.nsrca.org"
moz-do-not-send="true">NSRCA-discussion@lists.nsrca.org</A><BR><A
class=moz-txt-link-freetext
href="http://lists.nsrca.org/mailman/listinfo/nsrca-discussion"
moz-do-not-send="true">http://lists.nsrca.org/mailman/listinfo/nsrca-discussion</A><BR></P></DIV><PRE wrap=""><HR width="90%" SIZE=4>
_______________________________________________
NSRCA-discussion mailing list
<A class=moz-txt-link-abbreviated href="mailto:NSRCA-discussion@lists.nsrca.org" moz-do-not-send="true">NSRCA-discussion@lists.nsrca.org</A>
<A class=moz-txt-link-freetext href="http://lists.nsrca.org/mailman/listinfo/nsrca-discussion" moz-do-not-send="true">http://lists.nsrca.org/mailman/listinfo/nsrca-discussion</A>
</PRE></BLOCKQUOTE>
<P></P>
<HR>
_______________________________________________<BR>NSRCA-discussion
mailing list<BR><A class=moz-txt-link-abbreviated
href="mailto:NSRCA-discussion@lists.nsrca.org">NSRCA-discussion@lists.nsrca.org</A><BR><A
class=moz-txt-link-freetext
href="http://lists.nsrca.org/mailman/listinfo/nsrca-discussion">http://lists.nsrca.org/mailman/listinfo/nsrca-discussion</A></BLOCKQUOTE><PRE wrap=""><HR width="90%" SIZE=4>
_______________________________________________
NSRCA-discussion mailing list
<A class=moz-txt-link-abbreviated href="mailto:NSRCA-discussion@lists.nsrca.org">NSRCA-discussion@lists.nsrca.org</A>
<A class=moz-txt-link-freetext href="http://lists.nsrca.org/mailman/listinfo/nsrca-discussion">http://lists.nsrca.org/mailman/listinfo/nsrca-discussion</A>
</PRE></BLOCKQUOTE>
<P>
<HR>
<P></P>_______________________________________________<BR>NSRCA-discussion
mailing
list<BR>NSRCA-discussion@lists.nsrca.org<BR>http://lists.nsrca.org/mailman/listinfo/nsrca-discussion</BLOCKQUOTE></BODY></HTML>