Definition
An aircraft that generates lift from one or more powered rotors -- sets of rotating blades mounted on a vertical or near-vertical shaft -- rather than from fixed wings. Helicopters and gyroplanes are the most common examples.
Plain English
An aircraft whose lift comes from spinning blades on top, like a helicopter, instead of from stationary wings on the side.
Context Anchor
Seen when training material compares helicopters or gyroplanes with airplanes, or when discussing different kinds of aircraft a student may train in.
Derivation
Rotary' comes from the Latin rotare, 'to turn.' The term simply means an aircraft whose wings turn -- the rotor blades act as wings in motion.
Why Pilots Care
Rotary wing and fixed wing aircraft are governed by different certificates, ratings, and handling principles. Knowing which category an aircraft belongs to determines what training, endorsements, and procedures apply.
Grounding Statement
Picture a helicopter lifting off: the blades above it are the wings, and they make lift by rotating.
Intuition Check
Do not read “rotary wing aircraft” as an airplane with a special kind of wing. The “wing” is the rotating blade system that provides lift.
Example Sentence 1
A pilot who wants to fly a helicopter must earn a rotary wing rating, separate from any fixed-wing certificates they already hold.
Example Sentence 2
Rotary wing aircraft can take off and land vertically, allowing operations in areas without runways.