In Back-up Mode, how is roll control achieved?

In Back-up Mode, roll control is primarily achieved using the rudder pedals. This mode typically activates when the primary aileron control system is unavailable or compromised, necessitating alternative means for maintaining control of the aircraft's roll. The rudder pedals, when used effectively, can induce a differential yaw effect, which can subsequently lead to a change in the aircraft's bank angle, thus allowing for roll control.

In a situation where conventional aileron control is not functioning, the use of rudder for roll control allows pilots to maintain directional stability and manage turns, demonstrating the versatility of flight control systems in the Dassault Falcon 7X. This reliance on the rudder in emergencies or degraded modes is an important aspect of operating the aircraft effectively and safely during critical situations.

Other options, while they pertain to different control inputs, do not serve the specific role of providing roll control in Back-up Mode as effectively as the rudder pedals do.