Earth Gyro: Turbine Aeroplane Quiz

What causes the pitch bar or horizon disc to indicate the changing attitude of the aircraft?

The error signal is amplified and routed to the respective servomotor (correct)
The servomotor rotates to position the pitch bar or horizon disc
The synchro rotor is driven to the null position
The indicator synchro is connected to the gimbal synchro

What happens to the servomotors during attitude director operation?

They position the pitch bar or horizon disc
They amplify the error signal
They control the glide slope pointer
They drive the indicator synchro rotor to the null position (correct)

What is the purpose of the glide slope pointer?

To amplify the error signal
To direct the pilot to bring the aircraft down to the glide path (correct)
To indicate the localiser beam and runway centreline
To drive the servomotors

What happens to the localiser pointer if the aircraft is to the left of the localiser beam and runway centreline?

It is deflected to the right (B) Signup and view all the answers

What is the purpose of the ILS receiver on board the aircraft?

To detect signals beamed from ground transmitters in vertical and horizontal planes (B) Signup and view all the answers

What is the relation between the null position of the indicator synchro rotor and the null position of the synchro on the gimbal?

They are directly matched (C) Signup and view all the answers

What is indicated by the turn coordinator with a 30° canted gimbal?

Aircraft turn (C) Signup and view all the answers

What is written on the bottom of the turn coordinator?

No pitch information (B) Signup and view all the answers

Why must gyroscopes be handled delicately?

They are fragile (B) Signup and view all the answers

What happens if a gyro is removed while it is spinning or running down?

It will topple easily and cause damage (A) Signup and view all the answers

What is a good motto for the safe handling of gyros?

Handle like rotten eggs (B) Signup and view all the answers

Why should older systems not be moved for up to 30 minutes after disconnecting the power source?

To prevent damage to the bearings or gimbal assemblies (A) Signup and view all the answers

What is the purpose of a gyro erection system?

To maintain the gyroscope rotor and gimbals aligned at right angles to each other (C) Signup and view all the answers

What causes a gyro to precess from its normal position?

All of the above (D) Signup and view all the answers

What is the typical range of erection rates for a gyro?

1-5 degrees per minute (C) Signup and view all the answers

What is the purpose of a directional gyro?

To detect movement of the aircraft in azimuth (B) Signup and view all the answers

How does a gyro erection system maintain the rotor spin axis at the desired attitude?

By using the property of precession of the gimbal system (A) Signup and view all the answers

What is the orientation of the rotor spin axis in an attitude gyro?

Aligned vertically (C) Signup and view all the answers

What is required to control drift and transport wander in a gyroscope?

Conversion to an Earth gyro (A) Signup and view all the answers

What term is used to refer to a space gyro that is referenced to Earth?

Earth gyro (B) Signup and view all the answers

Why is the spin axis of a displacement gyro discounted?

It provides no useful attitude reference (C) Signup and view all the answers

What type of gyroscope uses rigidity in space to measure displacement around it?

Displacement gyro (D) Signup and view all the answers

In what way does a rate gyro determine the rate of movement?

By subjecting the gyro to precessive forces (C) Signup and view all the answers

What is the main difference between a displacement gyro and a rate gyro?

Measurement method of rate of movement (A) Signup and view all the answers

What happens when the gyro supplied with air pressure tilts to the left?

Door A opens and allows air to escape through orifice B (D) Signup and view all the answers

What is a major problem with air-driven gyro systems?

Dirt and dust (C) Signup and view all the answers

What type of power is required for high-speed rotors of displacement gyros?

115-V, 400Hz, three-phase AC (D) Signup and view all the answers

What is the purpose of the flapper door erection system?

To re-erect the gyro to the local vertical (C) Signup and view all the answers

Why are electrically-driven gyro systems used in high-performance aircraft?

To overcome the disadvantages of air-driven gyro systems (C) Signup and view all the answers

What is the rotational speed of high-speed rotors in displacement gyros?

21 000 rpm (B) Signup and view all the answers