Definition
A condition of flight in which the sum of all forces acting on the aircraft is zero, so the aircraft is neither accelerating nor decelerating in any direction. Airspeed, altitude, heading, and flight path remain constant. Steady flight can be straight-and-level cruise, a constant-rate climb, a constant-rate descent, or a constant-rate turn — any condition where the motion is unchanging over time.
Plain English
Flight where nothing is changing. The aircraft is moving in a fixed way — same speed, same path — because all the pushes and pulls on it are balanced out.
Context Anchor
Seen when learning how the main forces on an airplane balance during level flight, a constant climb, or a constant descent.
Derivation
Steady comes from an older meaning of fixed, firm, or not changing. In aviation, the key idea is not that the airplane is still, but that its motion is not changing.
Why Pilots Care
Recognizing steady flight lets pilots know the forces are balanced and tells them what control or power change is needed when that balance is lost.
Analogy
It is like driving a car straight down a level road at a constant speed. The car is moving, but its motion is steady because it is not speeding up, slowing down, or turning.
Intuition Check
Steady does not mean perfectly level or motionless. Here it means the airplane continues without a change in speed or flight path.
Example Sentence 1
In steady flight at cruise, thrust equals drag and lift equals weight, so the airplane holds its altitude and airspeed.
Example Sentence 2
During a steady climb the pilot maintains constant speed by setting thrust slightly above drag while adjusting pitch.