As an aircraft specification "Vne" indicates the maximum speed at which an aircraft can be flown while remaining within the design parameters ("Velocity never to exceed"). Aircraft should only be flown at or near Vne in smooth, still air, since the wing is under structural loads at or near designed safety margins. If one were flying at Vne and encountered turbulence, such as a thermal, the loads on the airframe could easily lead to structural failure of the aircraft. Additionally, no maneuvers, such as turns or abrupt pitch changes, should be made anywhere near Vne, since the additional g force can likewise overload the wing. Maximum maneuvering speed is indicated as "Va"

Most aircraft can be flown much faster than Vne very easily, so pilots must be aware of this specification and respect it. A hang glider's Vne (appx. 55 mph for racing gliders) is usually at or just below the maximum dive speed ("Vd") of the glider (without doing some extreme move, like a whipstall) so structural failures due to exceeding Vne are rare (they are rare for hang gliders in general) and hang glider pilots routinely ignore Vne specifications. This has led to trouble for hang glider pilots who take up other forms of aviation.