Definition
The lift produced by the wings beyond the amount required to balance the airplane's weight in level flight. When total lift exceeds weight, the surplus accelerates the airplane upward, producing a climb.
Plain English
Lift that is more than what is needed to hold the airplane up. The extra amount is what makes the airplane climb.
Context Anchor
Seen in climb discussions when explaining why an airplane climbs and why pulling the nose up alone is not the same as sustaining a climb.
Derivation
"Excess" comes from Latin excedere, meaning "to go beyond." Here it simply means lift that goes beyond what level flight requires.
Why Pilots Care
Understanding excess lift explains how an airplane transitions from level flight into a climb and why pitch attitude must be managed carefully.
Grounding Statement
If the airplane briefly makes more lift than required, it may start curving upward, but without enough engine power the airspeed will drop and the extra lift will not last.
Intuition Check
Do not read “excess lift” as “the extra lift that makes a normal climb happen.” In a steady climb, the important surplus is thrust or power; excess lift is usually temporary.
Example Sentence 1
After takeoff, the wings produce excess lift, and the airplane begins climbing toward its assigned altitude.
Example Sentence 2
In a climbing turn, excess lift must overcome both weight and the additional load factor.