All signs in the system are managed according to the international aeronautical axes convention: It is considered positive any deflection that generates positive rotational forces or moments about the aerodynamic centre of the aircraft, except for “y” axis (elevator) where it is considered negative a positive moment.
Sign Convention
Example, an elevator down position will generate a positive pitch so the elevator is considered positive on down position. Main actuators rules:
| Actuator | Positive | Negative |
|---|---|---|
| Elevator | Down | Up |
| Rudder | Right | Left |
| Right Aileron | Up | Down |
| Left Aileron | Down | Up |
| Tail Rotor | Right | Left |
Actuator Configuration