Attitude Indicator 2

Question 1

Attitude indicator

Answer 1

Earth tied gyro (true vertical spin axis pointing towards centre of earth achieved through rigidity and gravity on pendulous unit)

Freedom in three planes allows indication of pitch and roll
Horizon bar remains parallel with actual horizon (pivoted on outer gimbal)
Casing and aircraft move with ac horizon line stays steady

Question 2

AI errors

Answer 2

Acceleration error and turning error
Caused by pendulosity and erection error
Pendulosity swing due to acceleration or gravity (whole unit)
Erection error is swing of vanes due to acceleration or gravity or cpf
Acceleration is climbing right turn and deceleration is descending left for anti clockwise spinning rotor
Turning is climbing
Suction error not enough air means ai is sluggish

Question 3

AI limitations

Answer 3

Air driven Typically 55° in pitch 90° in roll
If exceeded rotor will topple