APART Study Material

Question 1

4 components of mechanical mixing unit

Answer 1

Collective to pitch - compensates for rotor down wash on the stabilator
Collective to roll - translating tendency
Collective to yaw - torque effect
Yaw to pitch - lift component of tail rotor

Question 2

Electronic coupling (of the tail rotor)

Answer 2

Collective/Airspeed to Yaw – Compensates for torque effect in addition to Collective to Yaw mixing based on collective position and airspeed. FCC#2 commands yaw trim actuator 100% below 40 knots decreases until 100 knots none above 100 knots

Question 3

5 subsystems of AFCS

Answer 3

1. SAS
2. Trim
3. FPS (Flight Path Stabilization)
4. Stabilator
5. Coupled Flight Director