AFCS Flashcards
(34 cards)
What is the purpose of the Wildcat Automatic Flight Control System (AFCS)?
To incorporate the autostabilisation and in addition detect and correct for long-term errors in the aircraft’s flight path
What is the purpose of the series actuators within the Main Rotor Actuators (MRA)?
They are used to provide autostabilisation
What is the purpose of the parallel actuators?
They operate in parallel with the pilot’s controls as a result of the output of the Automatic Flight Control System (AFCS) computer
What allows a parallel actuator to be physically overridden when the Automatic Flight Control System (AFCS) autopilot is engaged?
A slipping clutch mechanism
Where is the Automatic Flight Control System (AFCS) controller located?
In the interseat console
How are the Automatic Flight Control System (AFCS) controller push buttons and display indication illumination levels set?
Utilising the AFCS controller dimmer
What is the function of the Computer Acceleration Control (CAC)?
Enhances pitch stability and reduces sideslip in turns above 60 kt
The Automatic Flight Control System (AFCS) actuators are configured in series with the main actuators and operate over what percentage of the available range?
10%
Why are the Main Rotor Actuators (MRA) internally split?
Permits continued operation of the unit if a failure of hydraulic pressure occurs in one system, or one lane of the Automatic Flight Control System (AFCS) is unserviceable
The Tail Rotor Actuator (TRA) is ………. powered, dual tandem design with a common piston rod
A hydraulically
What permits yaw pedal movement after a Tail Rotor Actuator (TRA) failure lock up?
A shear pin mounted on the actuator arm
What is a yaw parallel actuator?
It is a slow acting, electromechanical rotary actuator that operates over the full range of control run movement
What is the purpose of the electrical signals from the fore and aft and lateral Control Position Transmitters (CPT) to the Automatic Flight Control System (AFCS) computer?
To back off the error signals from the Attitude and Heading Reference System (AHRS) during pilot initiated cyclic manoeuvres
Which of the following captions illuminate when the Automatic Stabilisation Equipment (ASE) button on the Automatic Flight Control System (AFCS) controller is depressed?
ASE, P1 and P2, R1 and R2, Y1 and Y2
What condition does the Automatic Flight Control System (AFCS) need to be in before the Computer Acceleration Control (CAC) becomes operational?
At least one collective channel lane needs to be engaged
What is a precondition for selecting height hold on the Automatic Flight Control System (AFCS)?
At least one collective lane is engaged
How is a manual height change with the Automatic Flight Control System (AFCS) height hold engaged normally achieved?
By selecting the COL REL button on the collective stick
What is the effect of pushing the trim switch on the Automatic Flight Control System (AFCS) controller vertically downwards?
The pitch and roll AFCS actuators in the Main Rotor Actuator (MRA) are centralised
What reason would the pitch and roll channels on the Automatic Flight Control System (AFCS) be trimmed?
To maintain the Centre of Gravity (CG) within the operating limits
What will be the Automatic Flight Control System (AFCS) output if the aircrew momentarily displace the heading trim switch?
The aircraft heading will trim in 1° steps
What information can the Automatic Flight Control System (AFCS) controller null indicators display?
Series actuator position and computer demand signals in lanes 1 and 2 of either the pitch/roll or yaw/collective channels
Where is the CAC CUTOUT switch located?
On the cyclic stick grip
What is the purpose of the CAC CUTOUT switch on the cyclic grip?
To disengage the Computer Acceleration Control (CAC) for fault diagnosis purposes
What is the function of the COL REL button on the collective lever handgrip?
To disengage either Radar Altimeter (RadAlt) or barometric height hold
