AFCS (Automatic Flight Control System) Flashcards Preview

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Flashcards in AFCS (Automatic Flight Control System) Deck (18)
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1
Q

What basic sub-systems comprise the Automatic Flight A1:B8 System?

A

Stabilator

Stability Augmentation System (SAS)

Trim

Flight Path Stabilazation (FPS)

2
Q

The AFCS subsystems provides what to the helicopter?

A

Static and dynamic stability

3
Q

SAS provides ___________ stability in the pitch, roll, and yaw axis.

A

dynamic

4
Q

The two stabliator amplifiers (or DSC) receive signals from?

A

Collective Stick Position Transducers

Lateral Accelerometers

Airspeed/Air Data Transducers

Pitch Rate Gyros

(CLAP)

5
Q

The stabilator is programmed to what 5 functions in Auto Mode?

A

Streamline

Collective Coupling

Angle of Incidence

Lateral Sideslip

Pitch Rate

(SCALP)

6
Q

If acceleration is continued or collective is _______ with the stabilator in a trailing edge down position, ________ ______ ____ ___ ______ ?

A

Decreased

Longitudinal control will be lost.

7
Q

What is the function of the test button on the Stabilator Control Panel?

A

It tests the fault monitoring circuits within the amplifiers.

8
Q

The appearance of the SAS OFF caution light indicates what?

A

A lack of hydraulic pressure to the SAS actuators.

9
Q

With SAS 1 or SAS 2 off, what happens to control authority?

A

The control authority of the remaining SAS will double its gain, but only up to %5.

10
Q

What provides fault monitoring for SAS 2?

A

SAS/FPS

11
Q

Trim functions in which axis?

A

Pitch, Roll and Yaw

12
Q

The forces required to override the slip clutches should a Trim actuator jam occur are?

A

Roll: 13 lbs

Yaw: 80 lbs

13
Q

Collective / Airspeed to Yaw (Electronic Coupling) provides max. mixing ______ kts, and no mixing _______ kts

A

0 to 40,

At or above 100

14
Q

The flight path stabilization (basic auto pilot) operates by?

A

Trim/FPS providing control positioning and force gradient with the pitch, roll and yaw trim actuators.

15
Q

The FPS function below 60 kts is to (1)__________________________. Above 60 kts it also includes (2)______________________.

A

(1) Maintain helicopter pitch and roll attitudes and heading hold.
(2) airspeed hold, and provides a coordinated turn feature.

16
Q

When in Manual Mode, the stabilator shall be set full down, when?

A

at speeds below 40 KIAS

17
Q

Manual operation of the stabilator in flight is (1) , except as (2) ?

A

(1) Prohibited
(2) required by formal training and maintenance test requirements or as an alternate stabilator control in case the AUTO mode malfunctions

18
Q

The placarded airspeed limits shall be observed as _________ ?

A

Ne: Not-to-Exceed