Turn And Direction Coord 2

Question 1

Turn indicator

Answer 1

Rate gyro
Uses vertical needle to indicate rate of turn
Neither TI nor TC give direct angle of bank
Balance ball to indicate slip skid
Mounted wing tip to wing tip tilting forced processed and geared to pointer to indicate rate of turn
Springs used to balance precession forces and stabilise indicator in one position throughout turn

Question 2

TI errors

Answer 2

Incorrect rotor speed: inaccurate
High g manoeuvres: high gs while yawing ti over reads
High AoB: increased movement in pitching plane renders TI somewhat useless

Question 3

Turn coordinator

Answer 3

Same info as it except needle becomes an aircraft
Usually electrically driven
Tc can show roll

Question 4

Coordination ball

Answer 4

The CB or balance ball indicates g forces (gravity and centripetal force)
In straight and level ball is in the centre in line with ac weight
Any skid means ac is banked and weight is not inline with the normal axis ball will no longer be centered

Shows resultant of weight and cpf
Balanced turn is equal
Slipping turn weight is more
Skidding turn cpf is more

Question 5

Heading indicator

Answer 5

When synchronised with compass provides heading info
Tied gyro
Aircraft turns around HI (outer gimbal moves 360° around normal axis inner gimbal remains stationary)
Caging synchronises system with compass ac must be level in pitch and bank
Rotor driven by jet of air on grooves
Air jet helps maintain the rotors vertical orientation through precession