What is the maximum operating speed (VMO) for the CRJ-900?

The maximum operating speed, known as VMO, for the CRJ-900 is indeed 335 KIAS. This speed represents the upper limit of the airspeed for safe operation of the aircraft in the cruise phase while avoiding potential structural stress or control difficulties that can occur at higher speeds. Operating at or below this limit is crucial for maintaining the aircraft's performance and ensuring adherence to safety regulations.

In the context of the other options, having VMO set at considerably lower speeds, such as 300 KIAS, 250 KIAS, or 350 KIAS, misrepresents the aircraft's operational capabilities. A VMO of 300 KIAS would unnecessarily limit the aircraft's performance, while a value of 250 KIAS would be even more restrictive and would not fall within the design envelope of the CRJ-900. Conversely, a VMO of 350 KIAS exceeds the structural limits of the aircraft, posing potential safety risks. Therefore, the identification of 335 KIAS as the correct VMO ensures proper understanding of the aircraft’s operational envelope and safety requirements.