Definition
The center of lift is the single point on a wing where the total lift force produced by the wing can be considered to act. It is the average location of all the lift being generated across the wing's surface, and it shifts forward or aft as the angle of attack changes.
Plain English
Lift isn't created at just one spot on a wing — it's spread out along the whole wing. The center of lift is the one point where you can imagine all that lifting force acting together, like balancing the wing on a single finger.
Context Anchor
Seen in basic aerodynamics diagrams that show lift, weight, and how forces act on an aircraft in flight.
Derivation
From the Latin centrum, meaning 'middle point,' and the Old English liftan, 'to raise.' So literally 'the middle point of the raising force' — which is exactly what it describes: the average point where the wing's lifting force is concentrated.
Why Pilots Care
Its location relative to the center of gravity affects pitching moments and longitudinal stability.
Analogy
Imagine many people lifting a table from different spots. The center of lift is like the one spot where their combined lifting effort could be shown as a single upward push.
Intuition Check
Do not assume the center of lift is always the physical middle of the wing. It means the point where the wing’s combined lifting force acts, and that point can move as airflow over the wing changes.
Example Sentence 1
As the pilot increased the angle of attack, the center of lift moved forward along the wing.
Example Sentence 2
A change in angle of attack moved the center of lift aft, requiring trim adjustment to maintain attitude.