Which device receives the combined input from trim actuators and pilot assist servos to drive the primary servos?

Which device receives the combined input from trim actuators and pilot assist servos to drive the primary servos?

• A. Mixing unit
• B. No. 2 FCC
• C. Swashplate
• D. Primary servos

Answer: (A)

The device that combines signals from trim actuators and pilot assist servos to produce the command for the primary servos is the mixing unit. In the UH-60S control system, pilot inputs on the cyclic, collective, and pedals, along with trim adjustments from the trim actuators and any pilot-assist servo inputs, are all fed into the mixing unit. It sums these inputs to generate a single, coordinated command that drives the primary servos. The primary servos then move the swashplate to create the needed blade pitch and cyclic changes. Understanding the other parts helps place this in context: the swashplate is the mechanical interface that translates the servo commands into blade pitch changes; the primary servos are the actuators that physically move the swashplate; and the No. 2 flight control computer provides control logic and redundancy but does not itself perform the direct mixing of trim and pilot-assist signals to drive the servos.

The device that combines signals from trim actuators and pilot assist servos to produce the command for the primary servos is the mixing unit. In the UH-60S control system, pilot inputs on the cyclic, collective, and pedals, along with trim adjustments from the trim actuators and any pilot-assist servo inputs, are all fed into the mixing unit. It sums these inputs to generate a single, coordinated command that drives the primary servos. The primary servos then move the swashplate to create the needed blade pitch and cyclic changes.

Understanding the other parts helps place this in context: the swashplate is the mechanical interface that translates the servo commands into blade pitch changes; the primary servos are the actuators that physically move the swashplate; and the No. 2 flight control computer provides control logic and redundancy but does not itself perform the direct mixing of trim and pilot-assist signals to drive the servos.