Definition
Flight in which the aircraft maintains a fixed altitude, requiring the pilot to balance lift, weight, thrust, and drag so that the airplane neither climbs nor descends. To hold altitude as airspeed changes, the pilot adjusts pitch and power together so that lift continues to equal weight.
Plain English
Flying along while keeping the same height above sea level, not going up or down. As speed changes, the pilot has to adjust pitch and power to keep the airplane level.
Context Anchor
Seen in aircraft performance and slow-flight discussions, especially when explaining why more power may be needed to hold altitude at very low airspeeds.
Why Pilots Care
Understanding constant-altitude flight explains why power and airspeed relationships reverse at low speeds and prevents unintended climbs or descents.
Grounding Statement
Picture the altimeter staying steady while the pilot adjusts pitch and power to keep the airplane from climbing or descending.
Intuition Check
Constant-altitude flight does not mean constant power or constant airspeed. It only means the aircraft is holding the same altitude.
Example Sentence 1
During slow flight practice, the student maintained constant-altitude flight while gradually reducing airspeed toward the stall warning.
Example Sentence 2
Performance data for constant-altitude flight shows the minimum power required occurs at the speed for best lift-to-drag ratio.