Mailing List lml@lancaironline.net Message #67448
From: John Barrett <2thman1@gmail.com>
Sender: <marv@lancaironline.net>
Subject: Re: [LML] Hot TITs on X country leg. LIVP
Date: Thu, 17 Oct 2013 10:33:47 -0400
To: <lml@lancaironline.net>
Fair question, Craig despite the use of the perjorative term "wussy".  I'm interested in running my engine fairly conservatively especially while I'm learning how to protect it from events that are detrimental to it.  I may decide to continue running in that percentage of power range or may start pushing it up a bit as I get more comfortable.

The third attempt to lean went quite a bit beyond what the engine could handle evidenced by enough engine roughness that I thought it might quit.

I did not leave the settings for more than a second due to the immediate alarms and temps I was seeing.  Are you saying that if I had left the FF lean for some time those temps would start back down?  

John

Sent from my iPad


On Oct 16, 2013, at 9:44 PM, Craig Berland <cberland@systems3.net> wrote:

John,

 

Why were you running such a wussy power setting? J

Looks like your TIT’s were high because you never leaned far enough for that power setting.

 

Craig Berland

N7VG

 

Hello all,

We returned home yesterday from East Coast visits following LOBO mtg in Greenville, SC.

On the way to Greenville after an intermediate stop in NE, we experienced an engine problem that I brought to the attention of anyone at LOBO who would listen and give advice including Neil George from TCM with Allen Barrett hooked into the discussion by text and cell phone.  

The short story is that when I reached my planned VFR altitude of 15,500 and levelled off I pulled back power but forgot to lean or reset prop for about ten minutes.  Then when I remembered and tried to lean the engine, TITs skyrocketed followed by hot EGT readings.  See the attached link to the Savvyanalysis graphing of the engine behavior and see if you can come up with what went wrong.   When you review the graph, you’ll likely notice that I tried twice more after the initial leaning to see if I could get lean of peak and the engine emphatically let me know it did  NOT like what I was doing.

I can tell you the problem has been resolved and we flew the airplane around the country for another week with no repeats.  Now I'm interested to know what LMLers might think caused this because I was totally surprised when I learned what the real problem was.

Some of you who were supportive at LOBO already know the answer so let’s see what others come up with.   I have many people to thank for amazing help in finding and correcting the problem so I want to go on record as one of the most appreciative people there could be for LOBO, our many vendors and for pilots around the airport in Greenville who gave advice, time, materials, loaned tools and so on.




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