AirShares Elite recommends operating the SR22 engine at a lean of peak EGT fuel-flow setting in cruise. This not only improves fuel economy, but also extends the range of the aircraft thereby providing comfortable fuel reserves in the event a diversion from the destination is required. Operating lean of peak properly also reduces long term wear and tear on the engine as cylinder pressures and temperatures are significantly lower than when running a rich of peak mixture. The sacrifice of a few knots of airspeed is all that is required for this proven approach to piston engine management.
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Click here for an article on common errors seen in SR22 engine management.
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Without advanced engine management training, we recommed the following procedures for the normally aspirated SR22:
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| Phase of Flight |
Power Lever |
Mixture Control |
Fuel Flow |
EGTs |
CHTs |
| CLIMB |
Full forward |
Lean per Max. Power Fuel Flow Placard |
Click here |
±1400° |
mid-300°s |
| CRUISE |
Set to 75% Power |
Lean to Best Economy -50° Lean of Peak EGT (Fuel flow dependent on altitude) |
13-15 GPH |
±1425° |
low-300°s |
| DESCENT |
As required |
Enrichen if rough running engine or during Before Landing checklist |
As req'd |
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> 240° |
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Advanced Engine Management
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| The Good, The Bad, and The Ugly
Michigan-based Cirrus instructor with OptAir, Don Weaver, has put together an informative presentation that includes Emax data analysis of flights with engine management techniques labeled: good, bad, and ugly. Definitely worth a look!
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| Piston Engine Management
Master CFI, Neil Singer, reviews basic concepts, and introduces advanced topics including mixture management, lean of peak operations, and abnormal procedures.
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| Engine Management Seminar
Take a look at this presentation used for COPA proficiency program training. If this doesn't convince you that lean of peak is the way to go, I don't know what will.
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Click here to download a Teledyne-Continental Motors publication, "Tips on Engine Care"
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Click the GAMI banner above to read an outstanding three part series of articles on lean of peak operations.
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Click on John Deakin's photo to the left to access a collection of his highly educational articles on piston engine properties and engine management.
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