Definition
The slowest airspeed at which an airplane can sustain level flight at a given power setting and configuration, where the wing is producing just enough lift to balance weight and any further reduction in speed will result in a loss of altitude or a stall.
Plain English
The slowest you can fly while still holding altitude. Go any slower and the airplane will start to sink or stall.
Context Anchor
Seen when learning slow flight, elevator control, and how pitch changes the airplane’s energy state.
Why Pilots Care
This speed marks the lower limit of sustained level flight and shows when further speed reduction will force a descent or stall.
Grounding Statement
Picture the airplane flying level while getting slower: eventually the nose must be held so high that the wing is almost out of usable lift.
Intuition Check
Minimum does not mean a recommended slow speed or a safety target. Here it means the lowest speed at which level flight can still be maintained in the current conditions, with very little margin left.
Example Sentence 1
During slow flight practice, the student reduced power and raised the nose until the airplane was at minimum level flight airspeed, just above stall.
Example Sentence 2
When the airplane fell below minimum level flight airspeed on final approach, it began to sink even though power remained at idle.