Definition
VNE is the maximum speed at which an airplane may be operated in smooth air. Flying faster than VNE risks structural damage or failure, even when the air is calm. VNE is shown as a red radial line on the airspeed indicator.
Plain English
VNE is the absolute speed limit of the airplane. No matter the conditions, you must never fly faster than this speed.
Context Anchor
Seen on the airspeed indicator, in the airplane’s operating handbook, and during discussions of high-speed descents or speed margins.
Derivation
From the aviation convention of using V (for velocity) followed by letters that describe the type of speed limit. NE stands for 'Never Exceed.' So VNE literally reads as 'velocity, never exceed.'
Why Pilots Care
Exceeding VNE can cause structural failure or loss of control.
Intuition Check
VNE is not a target speed or a fast cruise speed. It is a red-line limit: stay below it.
Example Sentence 1
During the descent, the pilot eased back on the throttle to make sure the airspeed stayed well below VNE.
Example Sentence 2
VNE appears as the red line near the top of the airspeed indicator.