Disking occurs when a pilot or control system drives the propeller blades to near-zero pitch, turning their flat faces directly into the oncoming airstream. This turns the spinning propeller into a solid aerodynamic disk that generates massive drag. It is primarily used during descent or landing rollout to rapidly slow the aircraft without relying solely on wheel brakes.
Keep disking the props until we make the high-speed taxiway turnoff.
Disking creates a loud, distinctive roar on the ground as the flat blades beat against the air, which passengers often mistake for reverse thrust.
Also heard as
- disking
Related terms
Featherable
A featherable propeller can rotate its blades parallel to the airflow to reduce drag when the engine stops.
Airbrake
A deployable flight control surface designed to increase aerodynamic drag.
Drag parachute
A parachute deployed from the tail of an aircraft or spacecraft to provide aerodynamic braking.