Definition
The phase of a spin that begins when the airplane stalls and starts to rotate, and ends when the spin becomes fully developed. It typically lasts about 4 to 6 seconds, or roughly the first two turns, during which the rotation, pitch attitude, and airspeed have not yet stabilized.
Plain English
The early, just-starting part of a spin — after the wing has stalled and the airplane has begun to rotate, but before the spin has settled into a steady pattern.
Context Anchor
Seen in spin awareness and spin recovery training, especially when describing the first moments after a stall turns into a spin.
Derivation
From Latin 'incipere', meaning 'to begin'. An incipient spin is literally the 'beginning' spin — it has started but is not yet fully formed.
Why Pilots Care
Recovery from an incipient spin requires less altitude loss and simpler control inputs than recovery from a fully developed spin, making early recognition critical for safety.
Grounding Statement
Picture the nose dropping and one wing falling as the airplane starts to rotate; that first developing rotation is the incipient spin.
Intuition Check
Incipient does not mean harmless or mild. It means beginning: an incipient spin is already a developing spin and needs immediate recovery action.
Example Sentence 1
The instructor demonstrated recovery during the incipient spin, before the airplane had completed even one full turn.
Example Sentence 2
The pilot applied full opposite rudder and forward stick at the first sign of an incipient spin and the airplane returned to normal flight with minimal altitude loss.