Assembly & Rigging

Question 1

1. What are three types of commonly used flight control systems.

Answer 1

Cable
Push pull tubes
Torque tube systems

Question 2

2. What is used in large metal aircraft to keep control cable tension within acceptable limits?

Answer 2

Cable tension regulator

Question 3

3. What is a fair lead?

Answer 3

Cable guide deflects straight run cables around structures

Question 4

4. How much cable deflection is acceptable due to fairlead?

Answer 4

3 degrees

Question 5

5. Where does failure of control cable occur most frequently?

Answer 5

Pulleys and fairleads

Question 6

6. Which flight control surfaces are considered to primary group?

Answer 6

Elevators
Ailerons
Rudder

Question 7

7. Which flight controls are considered the secondary group?

Answer 7

Trim tabs
Spring tabs
Wing flaps
Servo tabs
Anti servo tabs

Question 8

8. Which flight controls are in the auxiliary group?

Answer 8

Trailing Edge Flaps
Slats
Slots
Speed Brakes etc.

Question 9

10. What is a balance tab?

Answer 9

Aux control with fixed linkage. When control surface is moved one way the balance tab moves opposite

Question 10

11. What is a trim tab?

Answer 10

Aux control attached to trailing edge of primary control reduces workload on pilot

Question 11

13. Why is it important for the blades of a helicopter rotor system to be tracked?

Answer 11

Reduce vertical vibration

Question 12

15. What unit on a helicopter is used to compensate for torque created by the main rotor?

Answer 12

Tail rotor

Question 13

9. How do wing flap affect landing speed and approach angle of an aircraft?

Answer 13

Decrease speed increases lift = steeper slower landing

Question 14

12. What is the purpose of the collective pitch control in a helicopter?

Answer 14

Changed pitch of Main rotor blades collectively increasing or decreasing lift

Question 15

14. What is the most efficient way to check a helicopter rotor for dynamic balance?

Answer 15

Balance//analyzer computer

Question 16

16. What control operates the helicopter tail rotor?

Answer 16

Anti-torque pedal

Question 17

17. What are the three axes of an aircraft, and which control surfaces cause the aircraft to move about each axis?

Answer 17

Longitudinal - nose to tail - ailerons for roll
Lateral - wingtip to wingtip - elevators for pitch
Vertical - top to bottom center - rudder for yaw

Question 18

18. When installing an aircraft bolt, what precaution would you take regarding the position of the bolt?

Answer 18

Direction of flight
Bolt head top down - vertical
Bolt forward- horizontal

Question 19

19. How is the propeller torque corrected for during assembly and rigging in some single engine aircraft?

Answer 19

The leading edge of stabilizer is offset from centerline

Question 20

20. What reference publications should be used to rig aircraft, including the control system?

Answer 20

Refer to TCDS or Aircraft Specifications

Question 21

21. What are vortex generators?

Answer 21

Reduce airflow separation of airstream that causes stalls

Question 22

22. What is a servo tab?

Answer 22

Cockpit control adjustable tab attached to trailering edge of primary control. Moves opposite direction of control surface aid in moving primary

Question 23

23. What factors are used to determine the proper cable tension?

Answer 23

Size of cable & outside temperature

Question 24

24. Why do control surfaces need to be statically balanced?

Answer 24

Put of balance control can cause sever flutter

Question 25

25. What is a spring tab?

Answer 25

Flight control using spring assist at high speed

Question 26

26. What tool can be used to measure control surface travel?

Answer 26

Protractor