AFCS Flashcards
Pressing the SAS/AP CUT switch on the cyclic will take you to what Level?
1
SAS/AP Cut
SAS On
Force Trim Release (FTR).
Beep Trim
APP MD DCPL
GA (Go Around)
-Cancels all upper modes and reverts to ATT mode
-Opens both cyclic stick parallel actuator clutches to release stick forces and if autopilot is active, sets the new reference for the autopilot’s auto trim function.
-Modifies the attitude reference in ATT MODE. Modifies IAS, ALT, ALTA, HDG, GA or VS reference when the respective upper mode is engaged.
-(Re)engagement of P/R/Y back-up SAS.
-Disengages both the back-up SAS AND AFCS simultaneously.
-Used in the event of a missed approach, acquires and holds a vertical speed of 1000 ft./min. After 10 seconds, the mode automatically reverts to the VS mode.
SAS/AP Cut - Disengages both the back-up SAS AND AFCS simultaneously.
SAS On - (Re)engagement of P/R/Y back-up SAS.
Force Trim Release (FTR) - Opens both cyclic stick parallel actuator clutches to release stick forces and if autopilot is active, sets the new reference for the autopilot’s auto trim function.
Beep Trim - Modifies the attitude reference in ATT MODE. Modifies IAS, ALT, ALTA, HDG, GA or VS reference when the respective upper mode is engaged.
APP MD DCPL - Cancels all upper modes and reverts to ATT mode.
GA (Go Around) - Used in the event of a missed approach, acquires and holds a vertical speed of 1000 ft./min. After 10 seconds, the mode automatically reverts to the VS mode.
What button on the cyclic must be pressed to move the system from Level 5 Upper Modes to Level 4 Attitude Hold?
The basic structure of the AFCS consists of three types of components.
Write the name of each type of component in the box to the right of its corresponding letter.
A = [a]
B= [b]
C= [c]
Sensors
Computers
Actuators
The UH-72 AFCS controls the [a], [b] and [c] making it a 3 axis system.
Pitch
Roll
Yaw
The SEMAs provide the actuator input for the _____ to dampen dynamic and atmospheric disturbances? (Abbreviated Answer)
SAS
What AFCS system makes inputs that cannot be seen in the flight controls?
SAS
In Level 1 Unstabilized, pressing the SAS ON button on the cyclic will move the system to level 2 Backup SAS.
True or False?
True
What system is used for basic stabilization of helicopters?
SAS
Which cyclic switch is used to turn off the backup SAS?
SAS/AP Cut Switch
In 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 [a] then press the [b] switch on the APMS followed by the [c] switch located on the [d].
4
Trim
FTR
Instrument Panel
Pressing the [a] / [b] [c] switch on either cyclic will switch from Level 4 Attitude Hold to Level 1 Unstabilized.
SAS
AP
Cut
Identify the operational differences between the Stability Augmentation System (SAS) and Trim System (Parallel Actuators) by matching the characteristic to its corresponding system.
-Has the capacity for full flight control authority
-Pilot can see and feel flight control inputs
-Allows for hands-off flight
-Has limited flight control authority
-Pilot cannot see or feel flight control inputs
-Does not allow for hands-off flight
Has the capacity for full flight control authority
Trim
Pilot can see and feel flight control inputs
Trim
Allows for hands-off flight
Trim
Has limited flight control authority
SAS
Pilot cannot see or feel flight control inputs.
SAS
Does not allow for hands-off flight
SAS
AFCS Levels [a] and [b] allow for hands off flying?
4
5
Which switch on the cyclic is a 4-way toggle switch that allows the pilot to modify the attitude reference when operating in ATT (Attitude) mode?
Beep Trim
