Read a Lycoming authored article called Tips For Extending TBO (Tips from Fred) that recommended a general cruise power setting of 31" 2200 RPM for engine life longevity for TIO-540's. 63% power.
Anyone ever used this setting? What kind of speed & fuel flow? Is it preferable over the 4 main POH settings Piper has of: Turbo (34/2400), Intermediate (31/2300), Economy (26/2400), Long Range (24/2200)
Piper's 'Intermediate' power setting is pretty darn close to Fred at 31/2300...but I thought 'Intermediate' was closer to 80% (200hp). A whole lot more power than Fred's 63%.
Confusing. Which is right?
Here is the paragraph from the article:
Conservative cruise power settings will also increase engine service life. A power setting of 2200 RPM and 31” Hg manifold pressure is recommended for all cruise flight. A maximum 1,450˚ F exhaust gas temperature and maximum cylinder head temperature of 420˚ F is recommended. Slight enrichment or cowl flap opening should be utilized if the cylinder head temperature level cannot be maintained. The preceding conditions correspond to a power setting of about 63% at standard conditions and approximately best power mixture strength.
I can paste the entire article if anyone is interested. Cant find a link to it.
What to make of this?
Thx.
Mark
Anyone ever used this setting? What kind of speed & fuel flow? Is it preferable over the 4 main POH settings Piper has of: Turbo (34/2400), Intermediate (31/2300), Economy (26/2400), Long Range (24/2200)
Piper's 'Intermediate' power setting is pretty darn close to Fred at 31/2300...but I thought 'Intermediate' was closer to 80% (200hp). A whole lot more power than Fred's 63%.
Confusing. Which is right?
Here is the paragraph from the article:
Conservative cruise power settings will also increase engine service life. A power setting of 2200 RPM and 31” Hg manifold pressure is recommended for all cruise flight. A maximum 1,450˚ F exhaust gas temperature and maximum cylinder head temperature of 420˚ F is recommended. Slight enrichment or cowl flap opening should be utilized if the cylinder head temperature level cannot be maintained. The preceding conditions correspond to a power setting of about 63% at standard conditions and approximately best power mixture strength.
I can paste the entire article if anyone is interested. Cant find a link to it.
What to make of this?
Thx.
Mark
