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I called Hacker first person thought it was the phenolic disk from the
fan being missing. Next guy who was to take the order was less
enthusiastic. He thought it could have been a de magnetized issue. Oh
well off to Hacker it goes :)<br>
I haven't flown the Pinnacle in over a year, guess it is time to get
re-aquainted.<br>
Thanks for the help.<br>
Stuart<br>
<br>
Richard Strickland wrote:
<blockquote cite="mid:BAY128-W1004198D2513A004F076E2A0F10@phx.gbl"
type="cite">
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</style>There's a pretty good chance the rotor has de-magnetized,
draws more amps to compensate and heats it up. Rotor is about
$180.00. Make sure the interior paper isn't rubbing the rotor and
there is <em>some </em>clearance--as there ain't much to start with...<br>
RS<br>
<br>
<hr id="stopSpelling">
Date: Mon, 31 Aug 2009 22:51:15 -0400<br>
From: <a class="moz-txt-link-abbreviated" href="mailto:schale@optonline.net">schale@optonline.net</a><br>
To: <a class="moz-txt-link-abbreviated" href="mailto:nsrca-discussion@lists.nsrca.org">nsrca-discussion@lists.nsrca.org</a><br>
Subject: Re: [NSRCA-discussion] Hacker Comp overheating<br>
<br>
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">
<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; margin-right: 0px;">
<div
style="font-family: arial; font-style: normal; font-variant: normal; font-weight: normal; font-size: 10pt; line-height: normal; font-size-adjust: none; font-stretch: normal;">-----
Original Message ----- </div>
<div
style="background: rgb(228, 228, 228) none repeat scroll 0% 50%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial; font-family: arial; font-style: normal; font-variant: normal; font-weight: normal; font-size: 10pt; line-height: normal; font-size-adjust: none; font-stretch: normal;"><b>From:</b>
<a moz-do-not-send="true" title="schale@optonline.net"
href="mailto:schale@optonline.net">Stuart Chale</a> </div>
<div
style="font-family: arial; font-style: normal; font-variant: normal; font-weight: normal; font-size: 10pt; line-height: normal; font-size-adjust: none; font-stretch: normal;"><b>To:</b>
<a moz-do-not-send="true" title="nsrca-discussion@lists.nsrca.org"
href="mailto:nsrca-discussion@lists.nsrca.org">General pattern
discussion</a> </div>
<div
style="font-family: arial; font-style: normal; font-variant: normal; font-weight: normal; font-size: 10pt; line-height: normal; font-size-adjust: none; font-stretch: normal;"><b>Sent:</b>
Monday, August 31, 2009 8:41 PM</div>
<div
style="font-family: arial; font-style: normal; font-variant: normal; font-weight: normal; font-size: 10pt; line-height: normal; 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">
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<div
style="font-size: 12pt; color: rgb(0, 0, 0); font-family: Arial;">Stuart,<br>
<br>
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.<br>
<br>
Good luck,<br>
<br>
Vicente "Vince" Bortone<br>
<br>
----- Original Message -----<br>
From: "Stuart Chale" <a moz-do-not-send="true"
class="EC_moz-txt-link-rfc2396E" href="mailto:schale@optonline.net"><schale@optonline.net></a><br>
To: "General pattern discussion" <a moz-do-not-send="true"
class="EC_moz-txt-link-rfc2396E"
href="mailto:nsrca-discussion@lists.nsrca.org"><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>
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