Originally Posted by
Lead Balloon
Neither, provided all cylinders are at peak. However, you could move to thrash or punish territory if you were to change the mixture to around 25C ROP.
Punishing? Really? This is exactly the range where engine manufacturers design the engine to be run. I don't understand this idea that aircraft engines are light, powerful, reliable, efficient, wonders of engineering and the designers are incompetent and don't know what they are doing.
What’s the fetish with “as approved by the Lycoming manual”? Is 24.734” MP and 2,355 RPM “approved”?
It was leaning at that power setting I was referring to, not the power setting itself. As opposed to your example, where the manual tells you to run full rich. The RPM and MP was simply chosen because it's corresponded approximately to 70%, was in the middle of the power chart, and the numbers were easy to follow.
24.734” MP and 2,355 RPM is fine, but harder to read off the chart.
What an interesting line. I’ve never heard of it.
It's on the Lycoming power charts.