In which operations is beta mode primarily used?

Beta mode is primarily used during ground operations, specifically in contexts where the engine must provide a controlled level of thrust to maintain vehicle stability and control while stationary or while taxiing. This mode allows for reduced thrust, optimizing fuel efficiency and engine wear when the aircraft is not in full flight.

In beta mode, the engine configuration is designed to allow for back thrust and lower speeds, enabling a smoother transition between different phases of ground operations, such as taxiing and even during engine run-up checks. This level of control is particularly useful when maneuvering on the ground, where precision is critical for safety and efficiency.

Flight operations generally require full engine thrust and power management features that are not present or not needed in beta mode. Similarly, take-off and landing operations demand full thrust and specific engine performance settings to ensure the aircraft can safely ascend or descend, which beta mode does not facilitate effectively. Therefore, its primary application is seen during ground operations, confirming its purpose in maintaining operational efficiency without compromising control.