Definition
The single point on a wing where the total lift force can be considered to act. It represents the average location of all the lift produced across the wing's surface. Its position shifts forward or aft along the wing's chord as the angle of attack changes.
Plain English
The spot on the wing where you can imagine all the lifting force pushing up at once. Even though lift is created across the whole wing, it adds up to one effective point — and that point moves a little as the wing's angle to the oncoming air changes.
Context Anchor
Seen in discussions of the four forces acting on an aircraft, especially when comparing lift with weight and center of gravity.
Derivation
From Latin centrum, meaning the middle point, and Old English lyft, meaning air or sky. In aviation, 'lift' became the term for the upward aerodynamic force, so 'center of lift' simply means the middle point of that force.
Why Pilots Care
The location of the center of lift relative to the center of gravity determines pitching tendencies and overall longitudinal stability.
Analogy
If several people lift a long board at different places, you could still describe their combined effort as one upward push acting at a single spot. The center of lift is that kind of single spot for the wing’s lifting force.
Grounding Statement
In steady flight, you can picture lift pushing up at the center of lift while weight pulls down at the center of gravity.
Intuition Check
Do not assume center of lift means the physical middle of the wing. It means the point where the total lifting force is treated as acting.
Example Sentence 1
As the pilot increased the angle of attack during slow flight, the center of lift moved forward along the wing.
Example Sentence 2
Increasing the angle of attack moved the center of lift forward along the wing chord.