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Rather than EGT probes, check around for TIT probes. Since they all reside just upstream of some turbine. one would expect them to be more robust (read expensive?) than EGT probes.
At least they are intuitively more appropriate ... Jim S.
David Staten wrote:
Putting the EGT after the turbo will not give true accurate results. Some of the heat energy of the exhaust is converted to mechanical energy and the tailpipe gases are of a lower temp... I'm surmising a few hundred degrees less.. One of the turbo calculator spreadsheets that was making the rounds actually displayed this Delta T as one of its calcs.
Now, I DONT know if the relationships stand up "post" turbo (peak, lean of peak, range of variance of temps).. one would think they would.. but that is a guess on my part.
Dave
cardmarc@charter.net wrote:
Only problem is that if a tip piece of the probe breaks off, it will go thru the turbine and make a mess. Just a thought. Many people only put one probe after the turbine because of this possibility. I do not have any firsthand experience with this happening but have heard of it.
Marc W
From: Bulent Aliev <atlasyts@bellsouth.net>
Date: 2005/01/10 Mon AM 01:51:58 GMT
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: [FlyRotary] EGT probes
Hi Guys, I removed my turbo manifold today for ceramic coating, so I want to install
two EGT probes, one for each rotor. I want to drill and tap into the cast
iron manifold about 1" away from the exhaust ports. My questions are:
1. Any draw backs?
2. Recommendations for probes that will stand up to the heat in this
location and will work with the EM2.
My engine starts instantly every time. At the beginning I kept the mixture
knob to the center position. Any movement to the left and the engine would
stumble. Now I'm noticing the knob is fully to the left and it is rich. Not
too rich but more than before? I guess it is time to get into the
programming stuff?
I'm drawing big crowds at the airport with this engine. Today I had to put a
yellow rope on the hangar doors so I can work. Handed chairs to the old
timers, the youngins had standing room only :)
Buly
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Homepage: http://www.flyrotary.com/
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