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From: "Bill Bradburry" <bbradburry@bellsouth.net>
To: "'Rotary motors in aircraft'" <flyrotary@lancaironline.net>
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Subject: RE: [FlyRotary] Re: EGT problem found!
Date: Fri, 22 Jun 2012 19:49:13 -0400
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Bobby,
Mine were staggered, but not individually covered.  The heat shrink went
over both wires.  I thought I just needed to add a little support and keep
them from grounding to outside items....I never thought that the insulation
on the individual wires would move out of the way and cause a short.

Bill

-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
Behalf Of Bobby J. Hughes
Sent: Friday, June 22, 2012 7:24 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: EGT problem found!

Bill

The lug connection between my probes and wire are staggered and individually
covered with a thick wall heat shrink.   


Bobby 

Sent from my iPad

On Jun 22, 2012, at 2:55 PM, "Bill Bradburry" <bbradburry@bellsouth.net>
wrote:

> Tracy and others,
> 
> I had a problem with the #2 EGT going erratically up to over 2K.  I
couldn't
> find anything wrong with the probe, so I sent the EM-2 to Tracy for
> evaluation.  He didn't find anything wrong with the EM-2 so back to the
> drawing board!
> 
> I got my hangar mate to come out and give me an assist.  We discovered
that
> if I moved the probe back and forth along the exhaust manifold, the output
> of the probe would change up to into the 40s milivolt.  At first I thought
> that I was somehow getting voltage onto the exhaust manifold and it was
> being picked up by the probe.
> 
> Turns out that the probe connects to the thermocouple wire with two ring
> connectors and the edges of the ring connectors were cutting thru the
> insulation of the adjacent wire causing a short.
> 
> Tracy has sent the EM-2 back and now I need to figure a way to connect the
> wires without causing a short and so that it doesn't cause an error in the
> output.
> 
> Anyone have a suggestion about how to do that??
> 
> Bill B
> 
> 
> --
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