Definition
The throttle, propeller, and mixture configuration recommended by the airplane manufacturer for level flight at a chosen altitude, typically expressed as a percentage of the engine's maximum continuous power. Cruise power is set after the climb is complete and the airplane has been leveled off and accelerated to cruise airspeed.
Plain English
The engine setting used for normal flight between climb and descent. It is the level-flight setting the manufacturer recommends for getting the airplane efficiently from one place to another.
Context Anchor
You encounter this when leveling off after a climb and adjusting the airplane from climb flight to normal cruise flight.
Derivation
“Cruise” originally meant to sail about or travel steadily over a distance. In aviation, it points to the steady traveling part of the flight, after takeoff and climb and before descent and landing. “Power setting” means the selected amount of engine output.
Why Pilots Care
Using the correct cruise power setting determines fuel consumption, engine temperature, and whether the aircraft meets the planned range and airspeed for the remainder of the flight.
Analogy
Like easing a car into a steady highway speed instead of accelerating hard or coasting.
Intuition Check
“Cruise” does not mean the airplane is flying itself or that power is no longer important. Here it means the steady, normal traveling phase of flight, with engine power set deliberately for that phase.
Example Sentence 1
After leveling off at 6,500 feet, the pilot reduced throttle and propeller RPM to the cruise power setting recommended in the POH.
Example Sentence 2
Selecting the economy cruise power setting extended the aircraft's range by nearly 30 minutes on the same fuel load.