I gotta ask - is that the Lyc 360 or the TCM 6 cyl unit? With your methods, you'll never wear out that throttle cable!
Carry on!
Mark
That's the Lycoming IO360. 2001 model Cessna 172R with the conversion.
I gotta ask - is that the Lyc 360 or the TCM 6 cyl unit? With your methods, you'll never wear out that throttle cable!
Carry on!
Mark
Not quite sure where you came up with these numbers. I scanned the document you referenced and didn't find anywhere an oil temp NEVER EXCEED of 200?.000: Peak EGT for best economy cruise under 75% Power
100: Degrees Fahrenheit ROP for max power cruise under 75% Power
200: Never exceed Oil Temperature
400: Never exceed CHT
Take off and climb: Full power and full rich...
Lycoming does NOT recomend LOP under no circumstances !!!
As simple as that !!! I will follow what the factory recomends ... Certainly the mother knows her Baby...
Here it is:http://www.lycoming.com/support/tips-advice/key-reprints/pdfs/Key Operations.pdf
I agree with you! Lets change these numbers to Max temp and Max CHT, they are rounded down for simplicity and for my personal use. (Easy to remember, that's all).Not quite sure where you came up with these numbers. I scanned the document you referenced and didn't find anywhere an oil temp NEVER EXCEED of 200°.
Or a NEVER EXCEED cht of 400°.
Never exceed oil temp is 245°.
Never exceed cht is 500°.
I did see for a recommended oil temp of 165-220°, and recommended cht max of 400°. But these are NOT never exceed numbers.
I think you cant go wrong using these numbers.
But I would contend the "mother's" knowledge is based upon the motivation to avoid paying out big monetary judgments were they to release some instructional information on running LOP and then someone messes it up. The safest avenue for the company as a whole to take is to NOT give out any instructions on running LOP. They then have deny-ability as a legal strategy to fall back upon in the courts.Ok, after so long time searching, and thinking about the importance of the issue, I came to this conclusion: Here is the Holly Bible, writen by Textron Lycoming itself for smal, normaly aspirated, four cylinder, flat opposed engines, like those found on most RVs.
There is no such thing as a Red Box, as long as you respect four very simple rules of thumb: 000 - 100 - 200 - 400 !!!
000: Peak EGT for best economy cruise under 75% Power
100: Degrees Fahrenheit ROP for max power cruise under 75% Power
200: Never exceed Oil Temperature
400: Never exceed CHT
Take off and climb (till 5000 feet): Full power and full rich...
Lycoming does NOT recomend LOP under no circumstances !!!
As simple as that !!! I will follow what the factory recomends ... Certainly the mother knows her Baby...
Here it is:http://www.lycoming.com/support/tips-advice/key-reprints/pdfs/Key Operations.pdf
Ok, after so long time searching, and thinking about the importance of the issue, I came to this conclusion: Here is the Holly Bible, writen by Textron Lycoming itself for smal, normaly aspirated, four cylinder, flat opposed engines, like those found on most RVs.
There is no such thing as a Red Box, as long as you respect four very simple rules of thumb: 000 - 100 - 200 - 400 !!!
000: Peak EGT for best economy cruise under 75% Power
100: Degrees Fahrenheit ROP for max power cruise under 75% Power
200: Never exceed Oil Temperature
400: Never exceed CHT
Take off and climb (till 5000 feet): Full power and full rich...
Lycoming does NOT recomend LOP under no circumstances !!!
As simple as that !!! I will follow what the factory recomends ... Certainly the mother knows her Baby better than anyone else...
Here it is:http://www.lycoming.com/support/tips-advice/key-reprints/pdfs/Key Operations.pdf
Why is Deakin more an authority than Lycoming? I'm very interested in hearing this rationalization...
See Hans' post #109. A lot of research and genuine science went into Deakin's writings. The test cell work done by "GAMI" (short for "General Aviation Modifications, Inc.," of Ada, Oklahoma,) was the basis for Deakin's writing on engine management. I suggest reading the whole series and compare it to Lycoming's probably-written-by-an-attorney advice. Rationalization? not really, just good science.
Deakin backs his recommendations with science, Lycoming doesn't. That is why Deakin's recommendations are not dogma and Lycoming's are.
Hans
Comparisons of "Building" to "Operating" a product are comparing apples and oranges. Telling "Peterbilt how to make truks and Caterpillar their Bulldozers" is not the issue here. No one is discussing the issue of telling Lycoming how to build aircraft engines. This discussion is about how to operate those engines.Lycoming is building bullet proof aircraft engines for more than 100 years now.
Certainly they have their own scientific department employing the best engineers you can get...
It's like willing to teach Victorinox how to build military knifes ... or Peterbilt how to make truks and Caterpillar their Bulldozers.
I agree with your statement. Lycoming is going to give out directions with the motivation in mind to protect their reputation as you say. True, true.Lycoming's reputation is dependant on how the engines are operated.
Lycoming is going to tell us to operate them the best way possible to ensure long engine life and maintain their reputation.
Not everybody has CHT and EGT gauges, yet alone one on every cylinder. That increases the risk of LOP so Lycoming doesn't recommend it.