Definition
The airplane's ability to gain altitude, expressed as rate of climb (feet per minute) and angle of climb (altitude gained per unit of horizontal distance). Climb performance depends on excess power and excess thrust available beyond what is needed for level flight, and it is affected by weight, density altitude, airspeed, configuration, and bank angle.
Plain English
How well the airplane can climb -- both how fast it gains altitude and how steeply it can go up. It depends on how much extra power and thrust the airplane has after just keeping itself flying level.
Context Anchor
Seen in maneuver training, takeoff planning, obstacle clearance, and climbing turns such as a chandelle.
Derivation
“Climb” means to go upward, especially with effort. “Performance” means how well something does a job. Together, the phrase points to how well the airplane can do the job of gaining altitude.
Why Pilots Care
It directly affects whether terrain or obstacles can be cleared during departure and determines how much altitude can be gained in a maneuver before airspeed decays.
Intuition Check
Do not assume climb performance means a steep nose-up attitude. An airplane can have its nose high and still climb poorly if it is too slow, too heavy, or does not have enough power for the conditions.
Example Sentence 1
On a hot, high-altitude day, the pilot reviewed the climb performance charts before departure to confirm the airplane could clear the ridge east of the airport.
Example Sentence 2
High density altitude reduced climb performance, so the pilot delayed the chandelle entry until reaching a safer altitude.