THE ARTIFICIAL HORIZON

Question 1

1. An artificial horizon utilises (i)………… to show (ii)…….. in (iii)……. and (iv)………….

Answer 1

d. (i) an earth gyro (ii) attitude (iii) pitch (iv) roll

Question 2

2. During the take-off run an air driven artificial horizon will usually indicate:

Answer 2

c. increased nose up attitude and right wing low.

Question 3

4. False nose-up attitude displayed on air driven artificial horizon during the take-off run is caused by:

Answer 3

b. the lag of the lateral pendulous vanes

Question 4

5. The rotor axis of an electrical horizon is tied to the earth’s vertical by:

Answer 4

d. two mercury level switches and two torque motors

Question 5

6. False right wing low attitude shown on an air driven artificial horizon during an acceleration is caused by:

Answer 5

a. the lag of the base of the rotor housing

Question 6

7. Inside an artificial horizon:

Answer 6

a. the inner gimbal ring is pivoted laterally inside the outer gimbal ring and the outer gimbal ring is pivoted longitudinally inside the case

Question 7

8. When an adjustable aircraft datum is fitted to an artificial horizon in light aircraft:

Answer 7

b. it should be set to the central position and left there

Question 8

9. An electrically driven artificial horizon has less errors during the take-off run because:

Answer 8

a. it is less pendulous, has a higher rotor speed and a linear acceleration cut out