09 - System: Autopilot

Question 1

Autopilot: Which components does the autopilot system consist of?

Answer 1

• Directional gyro
• Vertical gyro
• Sideslip detector
• Air data unit
• Computer
• Fail monitoring unit
• Trim control unit

(Instruction Manual - Basic 1 - Main Systems, Chapter 16, Paragraph 16.3)

Question 2

Autopilot: What are the functions of the parallel actuators and seriel actuators?

Answer 2

• Parallel actuator (Trim)
  
  • Pitch and Roll
  • Slow movements
  • 100% control authority
  • Anchors control
  • A/S, ALT, HDG hold
• Seriel actuator (Stabilization)
  
  • Pitch, Roll and Yaw
  • Fast movements
  • Limited control authority

(SFIM AP 85 T31, chapter 2)

Question 3

Autopilot: What is the purpose of the Collective-Yaw mechanical coupling?

Answer 3

To change the tail rotor blade incidence along with collective pitch setting

(Instruction Manual - Basic 1 - Main Systems, Chapter 16, Paragraph 16.2)

Question 4

Autopilot: What does the instrument panel galvanometer indicate?

Answer 4

The position of the yaw seriel-actuator

Question 5

Autopilot: What is the function of the <TRIM R> and <TRIM P> push-buttons on the honeywell panel?

Answer 5

• TRIM R
  
  • Disengage Roll Parallel-actuator
• TRIM P
  
  • Disengage Pitch Parallel-actuator

(SFIM AP 85 T31, chapter 3, paragraph 3.4.3.)

Question 6

Autopilot: What is the function of the <FEEL REL> push-button on the honeywell panel?

Answer 6

Allows the pilot to use the trim release push-button. The cyclic stick is anchored in pitch and roll

When OFF (pushed down), the pilot cannot use the trim release push-button, and autopilot will not be able to hold the specific pitch/roll attitude of the helicopter.

(SFIM AP 85 T31, chapter 3, paragraph 3.4.2. and 5.1.1.)

Question 7

Autopilot: What is the function of the <TAC> push-button on the honeywell panel?

Answer 7

When ON (pushed down), pilot actions on the cyclic is instantly maintained by the autopilot.