George and Walter,

 

Thank you for the additional data points on the 550 engines.

 

I happen to fly one of the worst engines (TSIO-520R) from an efficiency standpoint and could only remember the data points for my peers flying some of the marginally more efficient Cessnas. Of course, even my engine LOP is more efficient than the best engine running ROP. Now, if we only had a fuel injection system that would allow us to set a particular fuel flow or lambda value…

 

Best Regards,

Mike