AFCS Flashcards
Identify the operational items of Trim System (Parallel Actuators)
How’s the capacity for ForeFlight control authority
Pilot can see and feel flight control inputs
Allows for hands-off flight
Identify the operational items of the stability augmentation system (SAS)
Has limited flight control authority
Pilot cannot see or feel flight control inputs
Does not allow for hands-off flight
Low natural stability of a helicopter requires a_____ ______ of the pilot.
High workload
Which switch on the cyclic is a 4-way toggle switch that allows the pilot to modify the attitude reference when operating capital ATT (altitude) mode?
Beep trim
In the primary phase the uh-72 will be flown in level 3 with FTR off. To select level 3 the AFCS must first be in level ___ then press the ____ switches on the APMS followed by the ______ switch located on the _____.
4, Trim, FTR, Instrument Panel
What system provides attitude hold in the helicopter?
Autopilot
The uh-72 AFCS controls the ___, _____, and _____ making it a 3 axis system.
Roll, Pitch, Yaw
Place the five levels of EFCS control in the proper sequence
1.Unstabilized (no AFCS or auto pilot on)
2.Back up SAS, (SAS actuators on only)
3.Digital SAS (autopilot on - trim motors off)
4.autopilot (attitude retention)
5. Autopilot (upper modes)
Disengages both the back up SAS and AFCS simultaneously
SAS/AP CUT
(RE) Engagement of P/R/Y back up SAS
SAS ON
Opens both cyclic stick parallel actuator clutches to release stick forces and if auto pilot is active, set the new reference for the auto pilot auto trim function.
Force trim release FTR
Modifies the attitude reference in ATT mode. Modifies IAS, ALT, ALTA, HDG, GA or VS reference when the respective upper mode is engaged.
Beep trim
Cancels all upper modes and reverts to ATT mode.
AP MD DCPL
Used in the event of a missed approach, acquires and hold a vertical speed of 1000 feet/min. After 10 seconds, the mode automatically reverts to the VS mode
GA (Go Around)
Pressing the ___/___ _____ Switch on either cyclic will switch from level 4 attitude old to level 1 unstabilized.
SAS/AP CUT
The SEMA’s provide the actuator input for the _____ To dampen dynamic and atmospheric disturbances?
SAS
What system is used for basic stabilization of helicopters?
SAS
What AFCS system makes inputs that cannot be seen in flight controls?
SAS
What cyclic switch is used to turn off the back up SAS?
SAS/AP Cut Switch
AFCS Levels ___ and ___ allow for hands off flying?
4, 5
A. Sensors
B. Computers
C. Actuators
In level 1 unstabilized, pressing the SAS ON button on the cyclic will move the system to level 2 backup SAS?
True
The back up SAS is turned on when the_____ Switches are turned on or by pressing the ____ Switch on the cyclic
Avionics master, SAS ON
Pressing the SAS/AP Cut Switch on the cyclic will take you to what level?
1
What button on the sidewalk must be pressed to move the system from level 5 upper modes to level 4 attitude hold?
AP MD DCPL
