Definition
A climb in which the airplane is ascending at a constant airspeed and constant rate of climb, with all forces in equilibrium. Thrust equals drag plus the rearward component of weight along the flight path, and lift equals the component of weight perpendicular to the flight path. There is no acceleration in any direction.
Plain English
A climb where the airplane is going up at the same speed and the same rate the whole time. Nothing is speeding up, slowing down, or changing pitch — the climb is settled and unchanging.
Context Anchor
Seen in aerodynamics and performance discussions when explaining the forces acting on an airplane during a stabilized climb.
Derivation
‘Steady-state’ comes from engineering and physics, where it describes a system whose properties are not changing over time. Applied to a climb, it simply means the climb has settled into unchanging conditions.
Why Pilots Care
Understanding steady-state climb lets pilots calculate climb rate, climb gradient, and fuel use for performance planning and obstacle clearance.
Intuition Check
Steady-state does not mean level flight, and it does not mean all four main forces are equal. It means the climb is stable: the airplane is going up at a constant speed and along a constant path.
Example Sentence 1
After raising the nose and trimming for climb, the pilot waited for the airspeed to settle before noting the rate of climb in the steady-state climb.
Example Sentence 2
In a steady-state climb the excess thrust available determines how steeply the airplane can climb while keeping airspeed constant.