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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'>A little advertised problem is
interference from cheap walky-talkies such as those used by hunters. This may
or not be a problem in your area – I have lost two planes directly over a
deer stand. We have established that this is a problem by placing a model in
the middle of our field and keying the walky-talky on and off. There was no
doubt that it caused a problem. This is why I scraped all of my 72 MHz gear and
went to 2.4 GHz.</span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> </span></font></p>
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<p><b><i><font size=4 color=navy face="Brush Script MT"><span style='font-size:
13.5pt;font-family:"Brush Script MT";color:navy;font-weight:bold;font-style:
italic'>Jay </span></font></i></b><b><i><font size=4 color=navy
face="Brush Script MT"><span style='font-size:13.5pt;font-family:"Brush Script MT";
color:navy;font-weight:bold;font-style:italic'>Marshall</span></font></i></b><font
color=navy><span style='color:navy'> </span></font></p>
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<p class=MsoNormal style='margin-left:.5in'><font size=2 face=Tahoma><span
style='font-size:10.0pt;font-family:Tahoma'>-----Original Message-----<br>
<b><span style='font-weight:bold'>From:</span></b> </span></font><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>nsrca-discussion-bounces@lists.nsrca.org</span></font><font
size=2 face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'> [mailto:</span></font><font
size=2 face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>nsrca-discussion-bounces@lists.nsrca.org</span></font><font
size=2 face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>] <b><span
style='font-weight:bold'>On Behalf Of </span></b>Gray E Fowler<br>
<b><span style='font-weight:bold'>Sent:</span></b> Tuesday, September 02, 2008
9:30 AM<br>
<b><span style='font-weight:bold'>To:</span></b>
NSRCA-discussion@lists.nsrca.org<br>
<b><span style='font-weight:bold'>Subject:</span></b> [NSRCA-discussion] Ideas
on radio beserkness-cause of crash??</span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'> </span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'><br>
</span></font><font size=2 face=sans-serif><span style='font-size:10.0pt;
font-family:sans-serif'>Guys</span></font> <br>
<br>
<font size=2 face=sans-serif><span style='font-size:10.0pt;font-family:sans-serif'>Yesterday
on my 4th flight of the day my PCM Stylus went nuts. PCM program was set for
idle throttle and about 5-6 clicks(trim wise) of up elevator-all other surfaces
neutral, and this was tested as such by turning off the transmitter. As I
passed by center I noticed that I could not gain altitude and the the throttle
started going from idle to high...then ailerons started oscillating small
left-right deflections. I cut the throttle to the kill position but the engine
persisted up-down bursts. I was able to do a 180 degree turn with aileron
coming back to center...never losing altitude, but unable to change the
altitude,elevator seemed unresponsive. As I passed by center again I was losing
more and more control. The plane flew over the wooded area south of the field
at about 200 feet high, I could not turn and the ailerons rolled the plane
upside down and it went straight down into the trees. This whole episode last
about 45 seconds. Cannot find the plane, and remnants of Gustav are headed my
way.</span></font> <br>
<br>
<br>
<font size=2 face=sans-serif><span style='font-size:10.0pt;font-family:sans-serif'>Plane
was new had about 10 flights on it.</span></font> <br>
<br>
<font size=2 face=sans-serif><span style='font-size:10.0pt;font-family:sans-serif'>New
battery..NiMH 5 cell pack -no regulator (ran 5 cell packs for years, no
regulator) </span></font><br>
<font size=2 face=sans-serif><span style='font-size:10.0pt;font-family:sans-serif'>Reciever-1999
Stylus PCM-never crashed, wrapped in foam</span></font> <br>
<font size=2 face=sans-serif><span style='font-size:10.0pt;font-family:sans-serif'>New
switch</span></font> <br>
<font size=2 face=sans-serif><span style='font-size:10.0pt;font-family:sans-serif'>Transmitter-1999
Stylus, never been serviced, never had problems</span></font> <br>
<br>
<b><font size=2 face=sans-serif><span style='font-size:10.0pt;font-family:sans-serif;
font-weight:bold'>What would cause a PCM receiver to do such a thing?</span></font></b><font
size=2 face=sans-serif><span style='font-size:10.0pt;font-family:sans-serif'>
If I had and intermittent signal, once the receiver did get a signal the only
two throttle signals should have been idle (PCM hold) and off (transmitter). I
am going to send the transmitter in just to get checked.</span></font> <br>
<br>
<font size=2 face=sans-serif><span style='font-size:10.0pt;font-family:sans-serif'>Thanks
guys....<br>
<br>
<br>
Gray Fowler<br>
Senior Principal Chemical Engineer<br>
Radomes and Specialty Apertures<br>
Technical Staff Composites Engineering<br>
Raytheon</span></font></p>
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