Definition
A flight condition in which the airplane's longitudinal axis is not aligned with the relative wind, causing the aircraft to slip or skid through the air. The inclinometer ball is displaced from center, indicating that the rudder and aileron inputs are not properly balanced for the rate of turn or the bank angle being held.
Plain English
Flying in a way where the airplane is sliding sideways through the air a little, instead of moving cleanly in the direction the nose is pointed. The little ball in the turn indicator is off to one side, which tells the pilot the controls aren't balanced.
Context Anchor
Encountered during level turns when the pilot checks whether the turn is smooth and whether the ball is centered.
Derivation
From 'co-ordinate,' meaning to arrange things so they work together. In flight, it refers to rudder and aileron inputs working together so the airplane moves cleanly through the air. 'Uncoordinated' means those inputs are out of balance.
Why Pilots Care
Uncoordinated flight increases drag, reduces performance, and can hide the early signs of a stall or spin, especially during turns near the ground.
Analogy
It is like a car going around a corner while its tires are partly sliding sideways instead of rolling cleanly through the turn.
Grounding Statement
In coordinated flight, the airplane feels like it is turning cleanly; in uncoordinated flight, it feels or indicates that it is being pushed sideways through the turn.
Intuition Check
Uncoordinated does not mean the pilot is clumsy. Here it means the airplane’s turn and control pressures are not balanced, so the airplane is not moving cleanly through the air.
Example Sentence 1
The instructor pointed at the inclinometer and said, 'You're in uncoordinated flight; step on the ball to bring it back to center.'
Example Sentence 2
The instructor demonstrated how to correct uncoordinated flight by adding rudder pressure until the inclinometer ball returned to the center.