What is the maximum structural cruising speed (VNO) for aircraft?

The maximum structural cruising speed, commonly denoted as VNO, is an important speed limit for pilots during flight. This speed signifies the upper limit of the green arc on the airspeed indicator, which is the normal operating range. When flying at or below VNO, the aircraft is capable of withstanding turbulent air without risking structural damage.

For many light aircraft, VNO is often set around 129 knots indicated airspeed (KIAS), which allows pilots to operate efficiently and safely. Exceeding this speed can lead to potential structural issues and reduce the maneuverability of the aircraft. Additionally, flying at VNO enables pilots to have more control and ensures they stay well within the performance limits during typical flying conditions.

As for the other speeds listed, while they might represent different operational or performance limits for various aircraft, none align with the typical VNO for the aircraft in question as closely as 129 KIAS does, establishing it as a critical benchmark for safe flight.