Dale wrote in message ...
In article ,
(Stuart Grant) wrote:
You might save a small bit of fuel with lower RPM, depending on the MP.

As long as the engine is driving the prop I don't believe you will
notice any advantage to a lower RPM as far as "coasting" is concerned,
prop drag comes into play when the engine is no longer providing power.

Usually that transition point is about 1500 RPM. Below that the air
tends to drive the prop.