Definition
An aerodynamic stall that has progressed beyond the initial buffet and partial loss of lift to the point where the wing is no longer producing enough lift to support the aircraft, resulting in a pronounced nose drop and/or a significant loss of altitude until recovery action is taken.
Plain English
A stall that has gone past its first warning signs and is now in full effect — the wing has stopped flying, and the aircraft is dropping until the pilot recovers it.
Context Anchor
Encountered during stall training, instructor demonstrations, recovery practice, and discussions of aircraft control near low-speed flight.
Derivation
‘Fully-developed’ simply means the stall has reached its complete form — not just beginning, not partial, but the whole event in progress. The phrase distinguishes it from earlier stages like the ‘approach to a stall’ or an ‘incipient stall.’
Why Pilots Care
Prompt recognition of a fully-developed stall is required to apply the correct recovery procedure and prevent entry into a spin or loss of control.
Grounding Statement
In a fully-developed stall, the airplane may still be moving forward, but the wing is not making enough smooth lift to keep flying normally.
Intuition Check
Stall does not mean the engine quit here. It means the wing has lost normal lift because its angle to the airflow is too high. Fully-developed does not mean unrecoverable. It means the stall is clearly established, not just starting.
Example Sentence 1
During training, the instructor demonstrated a fully-developed stall so the student could feel the nose drop and practice the recovery.
Example Sentence 2
Recovery from a fully-developed stall requires immediate forward pressure to reduce the angle of attack followed by smooth power application.