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Date: Sat, 2 Jul 2011 21:58:04 -0500
Message-ID: <CAH_WSmqFnM7RH1dYyCXFpBtu+L6b8wWKyxJcQAvHZZb2qgvZhg@mail.gmail.com>
Subject: Re: [FlyRotary] Re: EGT and EM2
From: Thomas Mann <thomasmann51@gmail.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
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Tracy ..... does shielded wiring help avoid this issue?


On Sat, Jul 2, 2011 at 9:49 PM, Tracy <rwstracy@gmail.com> wrote:

> Thought I had commented on this before.   This symptom is most likely
> caused by impulse noise from routing the EGT lines too close to ignition
> leads or other high noise Sources.  The thermocouples generate low level
> signals in the millivolt range so it doesn't take much to spike the reading.
>
>
> Tracy
>
> Sent from my iPad
>
> On Jul 2, 2011, at 9:22 PM, Chris Barber <cbarber@texasattorney.net>
> wrote:
>
>  I have written about this before but continue to have issues.
>
>
>
> My EGT readings are inconsitant.  They seem to give what would seem to be
> a correct reading but then seem to cycles to much higher readings.  So, it
> may show 1500 but then jump to 3000, then 6500 then 7200 (or whatever) and
> then start from what seems to be low to high.
>
>
>
> I have not been sitting on my hands fretting.  I had sent the unit back to
> Tracy and mentioned it and he found nothing amiss.  Since then I have
> replaced all connections to the EM2, new thermalwire, new connectors and
> now new sensors from "thesensorconnnection" all to no avail.  While not
> flight essential, I hate that I can't solve the problem.  I tire of throwing
> money and time at it.  I have looked at grounds, redid connections and tried
> a few different connections methods (where I connect the thermal wire from
> the EM2 to the thermalwire from the actual EGT connector.
>
>
>
> This is becomeing a real annoyance.  I am currently finishing up my A/C
> install (95% done) and them I am back to my first squawk list...quite
> short now) before I have a squawk "party...yeah, yall are all
> invited....not time, just show up, I will do what I can to make it a party
> ;-)) before I pay a DAR.
>
>
>
> Ya'll's input is appreciated.
>
>
>
> Chris Barber
>
> Velocity N17010
>
> Houston, Texas
>
> 13b Turbo/Mistral Intake
>
>

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Tracy ..... does shielded wiring help avoid this issue?<div><br><br><div cl=
ass=3D"gmail_quote">On Sat, Jul 2, 2011 at 9:49 PM, Tracy <span dir=3D"ltr"=
>&lt;<a href=3D"mailto:rwstracy@gmail.com">rwstracy@gmail.com</a>&gt;</span=
> wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex;"><div bgcolor=3D"#FFFFFF"><div>Thought I had=
 commented on this before. =A0 This symptom is most likely caused by impuls=
e noise from routing the EGT lines too close to ignition leads or other hig=
h noise Sources. =A0The thermocouples generate low level signals in the mil=
livolt range so it doesn&#39;t take much to spike the reading. =A0=A0</div>
<div><br></div><div>Tracy<br><br>Sent from my iPad</div><div class=3D"im"><=
div><br>On Jul 2, 2011, at 9:22 PM, Chris Barber &lt;<a href=3D"mailto:cbar=
ber@texasattorney.net" target=3D"_blank">cbarber@texasattorney.net</a>&gt; =
wrote:<br>
<br></div><div></div><blockquote type=3D"cite"><div>
<div style=3D"direction:ltr;font-family:Tahoma;color:#000000;font-size:10pt=
">
<p>I have written about this before but continue to have issues.=A0 </p>
<p>=A0</p>
<p>My=A0EGT<a></a><a></a><a></a> readings are inconsitant<a></a><a></a><a><=
/a>.=A0 They seem to give what would seem to be a correct reading but then =
seem to cycles to much higher readings.=A0 So, it may show 1500 but then ju=
mp to 3000, then 6500 then 7200 (or whatever)
 and then start from what seems to be low to high.</p>
<p>=A0</p>
<p>I have not been sitting on my hands fretting.=A0 I had sent the unit bac=
k to Tracy and mentioned it and he found nothing amiss.=A0 Since then I hav=
e replaced all connections to the EM2<a></a><a></a><a></a>, new thermalwire=
<a></a><a></a><a></a>, new connectors
 and now new sensors from &quot;thesensorconnnection<a></a><a></a><a></a>&q=
uot; all to no avail.=A0 While not flight essential, I hate that I can&#39;=
t solve the problem.=A0 I tire of throwing money and time at it.=A0 I have =
looked at grounds, redid connections and tried a few
 different connections methods (where I connect the thermal wire from the=
=A0EM2<a></a><a></a><a></a> to the=A0thermalwire<a></a><a></a><a></a> from =
the actual=A0EGT<a></a><a></a><a></a> connector.</p>
<p>=A0</p>
<p>This is=A0becomeing<a></a><a></a><a></a> a real annoyance.=A0 I am curre=
ntly finishing up my A/C install (95% done) and them I am back to my first=
=A0squawk<a></a><a></a> list...quite short now) before I have a squawk &quo=
t;party...yeah,=A0yall<a></a><a></a><a></a> are
 all invited....not time, just show up, I will do what I can to make it a p=
arty ;-)) before I pay a DAR.</p>
<p>=A0</p>
<p><a></a><a></a><a></a>Ya&#39;ll&#39;s=A0input is appreciated.</p>
<p>=A0</p>
<p>Chris Barber</p>
<p>Velocity N17010<a></a><a></a><a></a></p>
<p>Houston, Texas</p>
<p><a></a><a></a><a></a>13b=A0Turbo/Mistral Intake</p>
</div>


</div></blockquote></div></div></blockquote></div><br></div>

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