Long range flight with rear engine only

[Walter Atkinson]

Larry:

** It would make sense to me to have them leaned out as much as possible.**

No, you want BSFC(min) for max engine efficiency. That would be at about 15-20 LOP at the reduced power you would want for best L/D for the airframe. That will give you max range. Leaning further will actually decrease the range as the engine will be less efficient. BSFC => Brake Specific Fuel Consumption => pounds of fuel required to produce one HP per hour => efficiency. You want to be producing the most HP per pound of fuel possible.

Max range is found at BSFC(min) and best L/D airspeed.