AFCS (Automatic Flight Control System) Flashcards
What basic sub-systems comprise the Automatic Flight A1:B8 System?
Stabilator
Stability Augmentation System (SAS)
Trim
Flight Path Stabilazation (FPS)
The AFCS subsystems provides what to the helicopter?
Static and dynamic stability
SAS provides ___________ stability in the pitch, roll, and yaw axis.
dynamic
The two stabliator amplifiers (or DSC) receive signals from?
Collective Stick Position Transducers
Lateral Accelerometers
Airspeed/Air Data Transducers
Pitch Rate Gyros
(CLAP)
The stabilator is programmed to what 5 functions in Auto Mode?
Streamline
Collective Coupling
Angle of Incidence
Lateral Sideslip
Pitch Rate
(SCALP)
If acceleration is continued or collective is _______ with the stabilator in a trailing edge down position, ________ ______ ____ ___ ______ ?
Decreased
Longitudinal control will be lost.
What is the function of the test button on the Stabilator Control Panel?
It tests the fault monitoring circuits within the amplifiers.
The appearance of the SAS OFF caution light indicates what?
A lack of hydraulic pressure to the SAS actuators.
With SAS 1 or SAS 2 off, what happens to control authority?
The control authority of the remaining SAS will double its gain, but only up to %5.
What provides fault monitoring for SAS 2?
SAS/FPS
Trim functions in which axis?
Pitch, Roll and Yaw
The forces required to override the slip clutches should a Trim actuator jam occur are?
Roll: 13 lbs
Yaw: 80 lbs
Collective / Airspeed to Yaw (Electronic Coupling) provides max. mixing ______ kts, and no mixing _______ kts
0 to 40,
At or above 100
The flight path stabilization (basic auto pilot) operates by?
Trim/FPS providing control positioning and force gradient with the pitch, roll and yaw trim actuators.
The FPS function below 60 kts is to (1)__________________________. Above 60 kts it also includes (2)______________________.
(1) Maintain helicopter pitch and roll attitudes and heading hold.
(2) airspeed hold, and provides a coordinated turn feature.
