Definition
The lowest airspeed at which an aircraft can maintain controlled flight in a given configuration and weight. Below this speed, the wings can no longer produce enough lift to support the aircraft, and a stall occurs.
Plain English
The slowest you can fly before the wings stop holding the aircraft up.
Context Anchor
Seen in discussions of slow flight, stalls, turns, approaches, and aircraft control.
Derivation
Minimum comes from the Latin word meaning “smallest.” In aviation, it means the lowest usable value for a specific situation, not simply a low number in general.
Why Pilots Care
Staying above minimum airspeed prevents loss of control and allows safe maneuvering.
Grounding Statement
As the airplane slows down, less air flows over the wings and controls, so there is less lift and less control authority available.
Intuition Check
Minimum airspeed does not mean “the slowest speed printed somewhere for the airplane.” It depends on the aircraft’s weight, configuration, bank angle, and what the pilot is trying to do.
Example Sentence 1
As the pilot raised the nose and reduced power, the aircraft approached its minimum airspeed and the stall warning began to sound.
Example Sentence 2
In a steep turn the pilot increased power to stay above minimum airspeed.