Definition
The rate at which an object rotates about an axis, expressed as the angle swept out per unit of time. It is commonly measured in degrees per second, revolutions per minute (RPM), or radians per second.
Plain English
How fast something is turning. Instead of measuring distance per second like normal speed, you measure how much angle it covers per second.
Context Anchor
Seen in discussions of aircraft turns, propeller rotation, and instruments that use spinning parts.
Derivation
From Latin angulus meaning 'corner' or 'angle,' and velocitas meaning 'swiftness.' Together: the swiftness with which an angle is covered. This helps because angular velocity is simply ordinary speed applied to rotation rather than straight-line motion.
Why Pilots Care
Pilots must manage angular velocity during turns and rolls to maintain control and avoid exceeding airframe limits.
Analogy
Think of the second hand on a clock. It doesn't really matter how long the hand is -- what matters is how quickly it sweeps around the face. That sweep rate is angular velocity.
Grounding Statement
If an aircraft’s nose is swinging left or right, angular velocity describes how quickly that direction is changing.
Intuition Check
Angular velocity does not mean regular straight-line speed. It means the speed of rotation or turning around a point or axis.
Example Sentence 1
Example Sentence 2
The propeller spins at a high angular velocity throughout the takeoff roll.