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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'>Not sure if this helps, but…..<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 style='font-size:
10.0pt;font-family:Arial;color:navy'>Since my Dad has been flying JR DSM (not
sure which RX) he has had seen ccasions of his radio glitching. Symptoms
seemed like a momemtary lockout or erratic servo response. Both times happened
on the ground, luckily. In the first case it was an OS160 on a home-made metal
motor mount. The rubber in the mount had come apart and it was rubbing metal
on metal with engine vibration. The second occasion was on a big gasser (not
his) where a muffler had broken loose and was rubbing metal on metal.<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 style='font-size:
10.0pt;font-family:Arial;color:navy'>It seems that these RX’s are
somewhat sensitive to onboard interference from metal to metal rubbing. I believe
this is not necessarily an RF problem, but maybe an IF problem freaking out the
RX.<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 style='font-size:
10.0pt;font-family:Arial;color:navy'>Richard Lewis<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>
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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'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
nsrca-discussion-bounces@lists.nsrca.org
[mailto:nsrca-discussion-bounces@lists.nsrca.org] <b><span style='font-weight:
bold'>On Behalf Of </span></b><st1:place w:st="on"><st1:PlaceName w:st="on">Ihncheol</st1:PlaceName>
<st1:PlaceType w:st="on">Park</st1:PlaceType></st1:place><br>
<b><span style='font-weight:bold'>Sent:</span></b> Sunday, April 26, 2009 9:20
PM<br>
<b><span style='font-weight:bold'>To:</span></b> <st1:PersonName w:st="on">General
pattern discussion</st1:PersonName><br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [NSRCA-discussion] JR
DSM glitch - trouble-shooting.</span></font><o:p></o:p></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Colin,<o:p></o:p></span></font></p>
</div>
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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'>I am not sure which regulator you have. However, I suggest
you to add a small heatsink to the regulator if it doesn't have one already.<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Team Associated as a small heat sink that is just a little bit wider
than a Jaccio regulator.<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>It's not so hard to cut those small heat sinks with dremel cutting
tool.<o:p></o:p></span></font></p>
</div>
<div>
<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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<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Also, re-bind the RX. My 9303 doesn't go back to mid
throttle. Throttle stick & trim position at the time of binding
changes a lot of thing. I've seen several cases of incorrect binding
(most with trim not at the bottom). <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Ihncheol<o:p></o:p></span></font></p>
</div>
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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='margin-bottom:12.0pt'><b><font size=2 face=Tahoma><span
style='font-size:10.0pt;font-family:Tahoma;font-weight:bold'>From:</span></font></b><font
size=2 face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'> colin
chariandy <cchariandy@yahoo.ca><br>
<b><span style='font-weight:bold'>To:</span></b> General discussion
<nsrca-discussion@lists.nsrca.org>; James Oddino
<joddino@socal.rr.com><br>
<b><span style='font-weight:bold'>Sent:</span></b> Sunday, April 26, 2009
3:41:55 PM<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [NSRCA-discussion] JR
DSM glitch - trouble-shooting.</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'>I noticed that when I powered down and up the Rx the
throttle servo moves to a near mid point position and immediately returns to
wherever the throttle is set. It (9303) always did that. So I think the Rx
lost power and on it's return the throttle servo did it's usual thing and
rev'd the engine. It also didnt respond from idle so maybe it is stalling.<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>I'll replace the servo and battery. I also noticed
that the heat shrink on the regulator was discoloured and torn so I think
I'll replace it as well.<o:p></o:p></span></font></p>
</div>
<div>
<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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<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>Colin.<br>
<br>
--- On <b><span style='font-weight:bold'>Sun, 4/26/09, James Oddino <i><span
style='font-style:italic'><joddino@socal.rr.com></span></i></span></b>
wrote:<o:p></o:p></span></font></p>
</div>
<blockquote style='border:none;border-left:solid #1010FF 1.5pt;padding:0in 0in 0in 4.0pt;
margin-left:3.75pt;margin-top:5.0pt;margin-bottom:5.0pt'>
<p class=MsoNormal style='margin-bottom:12.0pt'><font size=3
face="Times New Roman"><span style='font-size:12.0pt'><br>
From: James Oddino <joddino@socal.rr.com><br>
Subject: Re: [NSRCA-discussion] JR DSM glitch - trouble-shooting.<br>
To: cchariandy@yahoo.ca, "General discussion"
<nsrca-discussion@lists.nsrca.org><br>
Received: Sunday, April 26, 2009, 4:00 PM<o:p></o:p></span></font></p>
<div id=yiv1192927023>
<p class=MsoNormal><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>I don't believe a bad battery could cause the engine
to rev up unless your battery failsafe isn't set properly. Make sure it
is. <o:p></o:p></span></font></p>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'><o:p> </o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>The first thing I would look at is the possibility
that the throttle servo is stalled at low speed. That could be pulling
the battery/voltage regulator voltage down and it could recover after you
started to throttle up and removed the heavy load. <o:p></o:p></span></font></p>
</div>
<div>
<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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<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>Finally I would run a one amp discharge test on the
battery after it is fully charged to see if the battery is near its original
capacity. The best way to do this is to plot the voltage vs. time
taking readings every 5 to 10 minutes.<o:p></o:p></span></font></p>
</div>
<div>
<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'>Hope this helps. Let us know what you find.<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'><o:p> </o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>Jim<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'><o:p> </o:p></span></font></p>
</div>
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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>
<div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>On Apr 25, 2009, at 4:30 PM, <a
href="http://ca.mc313.mail.yahoo.com/mc/compose?to=cchariandy@yahoo.ca"
target="_blank">cchariandy@yahoo.ca</a> wrote:<o:p></o:p></span></font></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'><br>
<br>
<o:p></o:p></span></font></p>
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<div id=yiv1570532302>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>I had a close call today with my R921 Rx in an
Integral.<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>I noticed on taxi out that the engine rev'd up and
quickly back down without any command. At first I thought I must have
bumped the stick by accident. Then just before take-off there was no
responce from the throttle for a second or two then it was back. I thought the
170 may have loaded up a little and didnt respond. It did that one more
time before I aborted the flight. However, I could'nt reproduce the problem
in the pits.<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>Before powering down, I checked for holds or fades
on the data logger - nil.<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><st1:place w:st="on"><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>Battery</span></font></st1:place> voltage droped
from 8.2V to 7.8V and 7.6 under 1A load. When I re-charged it took 350mA
and I was only on for 3-4 mins.<o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>Now...I did accidentally run the battery down to
like 5V during winter but it did eventually recharge.<o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>I'm using a Jaccio perfect switch/6V regulator,
Jaccio 2000mAHr (1 season<o:p></o:p></span></font></p>
</div>
<div>
<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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</blockquote>
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