The Directional Gyro - Ch 14

Question 1

Accuracy

Answer 1

Short Term very accurate - better than compass

Long Term: Compass is more accurate

Question 2

Directional Indicator

Answer 2

Mounted Vertically - 2 gimbals 2 degrees of freedom
Displacement Gyro - electric or pneumatic
AC can move in pitch and roll with no disturbance

Question 3

Lubber Line

Answer 3

HDG reference

Shown on the moving card indicator

Question 4

Drives the motor

Answer 4

Air sucked in from external

Question 5

Coarse Erection

Answer 5

Air jet: precession

Question 6

Fine Erection

Answer 6

Wedge plate finalises adjustment with small adjustment

Question 7

Re-Align

Answer 7

Caging Gyro: caging knob lift = re-align ( every 10 minutes or after steep turn)

If left in, stops the gyro moving for aerobatics

Question 8

Electric Gyro Limits

Answer 8

Pitch and roll limits of 85 degrees

Question 9

Errors

Answer 9

Aligned gyro manoeuvre - gimbal lock - when the Gimbals are not at 90 degrees to each other

Drift - Apparent wander or Real/Random Wander