wjrhamilton(at)optusnet.c
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 Posted: Mon Jun 18, 2007 5:00 pm Post subject: Lean Of Peak EGT?? Was: Commander to Hawaii |
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Folks,
Look up "Pelican's Perch", and find a raft of material supporting LOP operations for long engine life and maximum fuel/cost efficiency.
A word of caution, theoretical and actual hottest cylinder are not necessarily the same, to get the best results you need a probe on each cylinder.
The whole issue was explored at a Coroners Inquest here several years ago, "Aggressive Leaning" was a claim made for the cause of an engine failure.
This was comprehensively demolished as a cause, Deakin at Pelican's Perch played a major roll.
Cheers,
Bill Hamilton
At 03:52 AM 20/06/2007, you wrote:
[quote] I know the LOP debate, and some folks’ experience with engines holding to TBO while running LOP, has changed many, including my, perception. I ran my 500 ROP for years and have never had any problems with the engines. I burned 22 gph, exactly twice as much as my Twin Comanche, so I wonder whether my EGT was not calibrated correctly.
If I remember correctly, the EGT operated only off the #1 cylinder? I don’t know.
Perhaps the other cylinders were actually running LOP and held up quite fine.
Nico
From: owner-commander-list-server(at)matronics.com [ mailto:owner-commander-list-server(at)matronics.com (owner-commander-list-server(at)matronics.com)] On Behalf Of DP
Sent: Monday, June 18, 2007 8:45 AM
To: commander-list(at)matronics.com
Subject: Re: Lean Of Peak EGT?? Was: Commander to Hawaii
Well put Old Bob!
- In all of the many hours of operating my 500B the red knobs were always agressively moved aftward from the moment of startup to shutdown. There is no way that sufficient heat can be produced at a 65% power setting to damage anything. I consistently see 24 GPH block fuel burns. The sweet spot is 2300 rpm/22inches (at) 7-10K. 175 KTS TAS all day long. The exhaust color is a light dove gray. Always run full rich in the climb and your engines will be happy.
Dennis N6273X
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