Definition
Stationary airfoil-shaped blades fixed to the inside of a turbine engine case that sit between rows of rotating blades. In the compressor section, they redirect and slow the airflow leaving each rotating stage so it enters the next stage at the correct angle and pressure. In the turbine section (where they are often called nozzle guide vanes), they direct hot gases onto the rotating turbine blades at the correct angle.
Plain English
Fixed blades inside a jet engine that don't spin. They sit between the spinning blades and steer the air or hot gas so it hits the next set of spinning blades at just the right angle.
Context Anchor
Seen in turbine engine compressor and turbine section descriptions, especially during maintenance, inspection, and engine airflow discussions.
Derivation
From Latin 'stator,' meaning 'one who stands.' In any rotating machine, the stator is the part that stays still while the rotor spins. 'Vane' comes from Old English for a flat blade or fin. So 'stator vanes' literally means 'standing blades' — a useful reminder that they don't move.
Why Pilots Care
Damaged or eroded stator vanes reduce compressor efficiency, increase the risk of stalls, and can lead to higher fuel burn or engine damage.
Analogy
Stator vanes are like fixed guide fins in a fan duct: the fan blades move the air, and the fixed fins help aim and smooth that air before it continues on.
Intuition Check
Do not confuse stator vanes with rotating blades. Stator vanes stay fixed in place and guide the air; rotor blades spin and add energy to the air.
Example Sentence 1
During the borescope inspection, the technician found erosion on several stator vanes in the high-pressure compressor.
Example Sentence 2
Stator vanes keep the airflow aligned as it passes from one spinning rotor stage to the next in the engine compressor.