Gyroscopes

Question 1

What are the following gyros used in and what are they controlled by:
1-space(free) gyro
2-tied(displaced gyro)
3-Earth gyro
4-rate gyro

Answer 1

1-none
2-DI and AH tied to a reference point with external control
3-AH controlled by earths gravity
4-turn and slip indicator

Question 2

What is the difference between real and apparent wander

Answer 2

Real: caused by random mechanical forces
Apparent: gyro changes position due to observer constantly changing position due to rotation of earth

Question 3

What is the formula for:
1-transport drift
2-transport topple

Answer 3

1-Rate of change of longitude per hour × sin latitude per hour
2-Rate of change of longitude per hour × cos latitude per hour