Definition
The aerodynamic relationship in which an aircraft's stalling speed increases as its load factor increases. Specifically, stalling speed rises in proportion to the square root of the load factor. An aircraft that stalls at a given speed in straight-and-level flight (1 G) will stall at a higher speed any time the load factor exceeds 1 G, such as during a steep turn, a pull-up, or a recovery from a dive.
Plain English
Anytime the wings are made to support more than the aircraft's normal weight -- like in a tight turn or a hard pull on the controls -- the airplane will stall at a faster speed than it normally would. The harder you load the wings, the sooner they quit flying.
Context Anchor
Seen in load factor discussions, steep turn training, maneuvering speed explanations, and accelerated stall awareness.
Derivation
Load comes from an old word meaning a burden or weight to be carried. Factor means something that contributes to a result. Stall originally meant to come to a stop; in aviation, it means the wing has stopped producing smooth, effective lift. Together, the phrase points to how extra wing load changes the speed at which a stall can happen.
Why Pilots Care
Recognizing that stall speed rises with load factor prevents accidental stalls during steep turns, climbs, or evasive maneuvers.
Grounding Statement
The faster the wings are being asked to do extra work, the sooner they reach their limit -- so stall speed climbs whenever load factor climbs.
Intuition Check
Load factor does not mean cargo weight here; it means how much force the wings are carrying compared with normal level flight. Stalling speed is not one fixed number; it can increase when the airplane is under extra flight load.
Example Sentence 1
Before rolling into a steep turn at low altitude, the instructor reminded the student about load factors and stalling speeds, since the aircraft would stall well above its normal level-flight stall speed.
Example Sentence 2
During a go-around with a heavy load the pilot monitors load factor and stalling speeds to maintain a safe margin above stall.