The Artificial Horizon Flashcards
What type of gyro does the AH use?
Earth gyro
In what axis is the AH gyro?
Vertical axis gyro
When considering the artificial horizon, the freedom of rotation about the lateral axis, inner gimbal, is how much?
55 degrees either side of the horizon
When the aircraft initiates bank, what are the movements of the inner and outer gimbals?
No movement, the inner and outer gimbals remain fixed to the true horizontal/vertical. Only the instrument case, the angle of bank scale and the miniature aircraft rotate about the aircraft’s longitudinal axis.
Movement of the outer gimbal indicates?
Roll
Movement of the inner gimbal indicates?
Pitch
Pendulous error during acceleration will result in a false?
Right bank indication
Pendulous error during deceleration will result in a false?
Left bank indication
Erection error during deceleration will result in a false?
Descent indication
RPM of the electrical artificial horizon?
22 000rpm
The electrical artificial horizon is held to the true vertical by?
torque motors controlled by mercury levelling switches
During a 360 degree turn, at what point will turning error be maximum?
At 180 degrees into the turn, thereafter reducing to zero
The RPM of a suction AH?
15 000 RPM
AH turning errors:
Turning through 90°:
Turning through 180°:
Turning through 270°:
Turning through 360°:
AH turning errors:
Turning through 90°: Under reads bank angle; Pitch error – indicating a climb
Turning through 180°: Bank angle correct; Pitch error – indicating a climb (maximum pitch up error)
Turning through 270°: Over reads bank angle; Pitch error – indicating a climb
Turning through 360°: Bank angle correct; Pitch correct
The layout of the vanes viewed from above, and the direction rotation of the gyro?
Top and bottom vanes are to the right, left vane at the top and right vanes and the bottom.
Anti-clockwise