Exam Review

Question 1

Purpose of GYROS?

Answer 1

IFR

Question 2

List the GYRO instruments

Answer 2

1. Turn Coordinator
2. Directional gyro
3. Gyro Horizon (Attitude)

Question 3

Describe a GYRO

Answer 3

• Movement in an direction

- Spinning = gyroscopic prop

Question 4

What are the 2 main properties of a GYRO?

Answer 4

1. RIGIDITY IN SPACE

2. PRECESSION

Question 5

What are gimbals?

Answer 5

Pivot points that allow rotation on axes

Question 6

What are the degrees of freedom?

Answer 6

gimbals = # degrees of freedom = # directions the rotor is free to move

Question 7

Universal Mounting and Semi Rigid Mounting

Answer 7

1. Free/ Universal
   - Directional/Attitude gyro
2. Restrict/Semi-rigid
   - Rate gyro

Question 8

What is TORQUE

Answer 8

Causes the gyro to PRECESS

Question 9

What is WANDER

Answer 9

• movement away from SPIN AXIS
• H DRIFT
• V Topple

Question 10

What causes WANDER

Answer 10

• Imbalance
• Bearing friction
• Inertia of gimbals

Question 11

How does a TURN COORDINATOR work?

Answer 11

• Precession
• Semi rigid
• 1 gimbal
• 1 freedom
• RATE of Turn

Question 12

DG and Slave system difference

Answer 12

Not north seeking, needs to be calibrated every 15min

Question 13

Purpose of the MAGNETIC COMPASS

Answer 13

indicate direction

Question 14

What are the components of the MAGNETIC COMPASS

Answer 14

Magnets, pivot, float, compass card, lubber line, horizontal reference, liquid, expansion unit, compression

Question 15

What is the ANGLE OF DIP?

Answer 15

Angle btwn earths surface and the magnetic lines of force (0 at poles)

Question 16

Describe VARIATION??

Answer 16

Mag north vs True north

Question 17

Define ISOGONIC

Answer 17

Connect points of equal variation

Question 18

What is ACCELERATION ERROR

Answer 18

Airspeed changes (inertia/magnetic dip) 
mostly on east and west

Question 19

What are the steps of a COMPASS SWING

Answer 19

??

Question 20

Compass swing preparation

Answer 20

N, E, S, W

Question 21

Purpose of a COMPASS CORRECTION card

Answer 21

Deviation correction for any heading

Question 22

Describe a SLAVE COMPASS SYSTEM

Answer 22

• automatic presentation of accurate magnetic headings

- no manual transfer needed

Question 23

Components of a SLAVE GYRO

Answer 23

HSI
DG
Flux Valve
Slave control/compensator

Question 24

Describe a MAGNETOMETER

Answer 24

Mag field sensing device (H&V)

Question 25

What are the advantages of a SLAVE GYRO??

Answer 25

No need to reset

Question 26

Describe an ACCELEROMETER

Answer 26

Measures G forces/acceleration on the VERTICAL axis

Question 27

Describe a G meter

Answer 27

3 pointers

1. current
2. max
3. Min

Question 28

Describe INERTIAL NAV

Answer 28

• Accelerometers movement
• Gyros (topple/drift)
• Local vertical
• True North

Question 29

What is INITIALIZATION

Answer 29

Leveling/Aligning the aircraft to a required reference

• Stationary
• Alignment (east)
• Leveling (no acceleration)

Question 30

What is the IRS LASER GYRO

Answer 30

Measures the RATE of rotations about each aircraft axis (PHASES)

Question 31

Advantages of the RLG??

Answer 31

Eliminates all moving parts