Gyroscopic Instruments

Question 1

Gyroscopic instruments

Answer 1

• Heading Indicator
• Attitude Indicator
• Turn Coordinator
• Turn and Slip Indicator

Question 2

Heading indicator

Answer 2

• Relies on Rigidity on Space
• Primary source of Heading information
• Senses rotation along the vertical axis
• Gyro spins in the horizontal axis
• Support gimbals drive the compass card
• Works through gears and linkage
• Not north seeking

Question 3

Heading error precession

Answer 3

• Causes the heading to drift

* Should check every 15 minutes

Question 4

Heading error tumbling

Answer 4

Occurs after excessive pitch and roll.

Question 5

Attitude indicator

Answer 5

• Mechanical Substitute for the natural horizon
• Gives immediate and direct information of plane’s pitch and bank
• Gyro spins in the horizontal plane
• Double Gimbal
• Allows free motion in two planes around the gyro (using principle of rigidity in space)
• Self erecting mechanisms
• Vacuum Driven, normally

Question 6

Pendulous vanes

Answer 6

• Use the concept of Precession

* Exhaust air provides force to erect the gyro

Question 7

Turn and slip indicator

Answer 7

• Older version
• Only gives rate of turn
• Gyro rotates in the vertical plane
• A single gimbal limits the direction in which the gyro can tilt, and a spring tries to return it to center.
• Because of precession, a yawing force causes the gyro to tilt left or right as viewed from the pilot seat.

Question 8

Turn coordinator

Answer 8

• Newer version
• Shows both rate of turn and rate of roll

Gimbal is set at a 30 degree angle
•Allows gyro more movement
•Allows force to be felt

Question 9

Inclinometer

Answer 9

• Contains fluid and ball
• Kerosene type fluid
• Steel ball
• Shows the quality of the turn (Coordination)
• Shows forces acting ball in the turns

Question 10

Heading indicator should be aligned with magnetic compass

Answer 10

Every 15 min

Question 11

What causes heading indicator to precess

Answer 11

Friction, bad bearings, age