Definition
A standardized set of airspeeds, established by the manufacturer and published in the Pilot's Operating Handbook, that define safe and efficient operating limits and target speeds for specific phases of flight or aircraft configurations. Each performance speed is identified by a V-speed designation (such as VS, VX, VY, VA, VFE, VNO, VNE) and represents either a regulatory limit, a stall reference, or a recommended speed for a particular maneuver or condition.
Plain English
These are the specific airspeeds the manufacturer tells you to fly for different situations — the speed for best climb, the speed not to exceed, the speed for safe maneuvering, and so on. Each one has a short code starting with V.
Context Anchor
Seen in aircraft performance charts, training materials, checklists, and aircraft operating manuals when planning or flying a specific phase of flight.
Derivation
From 'performance' (how the aircraft performs in flight) and 'speeds' (airspeed values). The 'V' in V-speeds comes from the French 'vitesse,' meaning speed — a convention adopted internationally for aviation airspeed designations.
Why Pilots Care
Using the correct performance speeds ensures safe takeoff and climb distances, efficient fuel use, and the ability to clear obstacles or meet required climb gradients.
Intuition Check
Performance speeds are not about how well the pilot is performing. They are the aircraft speeds that match what the airplane can safely and effectively do in a given situation.
Example Sentence 1
Before takeoff, the pilot reviewed the performance speeds in the POH to confirm the correct rotation and climb-out speeds for the aircraft's weight.
Example Sentence 2
Before departure the instructor reviewed the performance speeds so the student would know exactly when to rotate and what speed to hold on initial climb.