Aircraft Systems and Aerodynamics: Gyroscopes and Gimbals

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What is the primary advantage of electrically powered gyros over air-driven gyros?

They provide a more rigid gyroscopic reference (correct)
They require less maintenance effort
They need less power from the aircraft power supply
They are smaller in size

What is the main difference between electrical gyros and vacuum-driven gyros?

The type of stator used (correct)
The type of rotor used
The number of bearings
The type of motor used

What is the purpose of designing the rotor and its bearings in a specific way in electrical gyros?

To reduce the power consumption of the motor
To reduce the weight of the motor
To increase the radius of gyration and inertia (correct)
To increase the speed of the motor

What type of motors can be used to create forces in attitude gyros?

Electrical torque motors (D) Signup and view all the answers

What is the purpose of a caging knob in a directional gyro?

To reset the gyro to the magnetic heading (B) Signup and view all the answers

What is the primary requirement of any gyroscope?

To have the mass of the rotor concentrated near the periphery (D) Signup and view all the answers

What is the limitation of pitch attitude in modern attitude gyro instruments?

85 degrees nose up or nose down (A) Signup and view all the answers

What components are used in electrically driven gyros that reduce the maintenance effort?

More solid-state components (A) Signup and view all the answers

Why should attitude and directional gyros be caged during aerobatic manoeuvres?

To avoid damage to the instrument (A) Signup and view all the answers

What is the purpose of the housing in the motor assembly?

To form the inner gimbal ring (A) Signup and view all the answers

What is the advantage of modern attitude gyro instruments?

They have high-speed, self-erecting mechanisms (D) Signup and view all the answers

What can supply air pressure or vacuum to air-driven gyro rotors?

An engine-driven pump or a venturi (C) Signup and view all the answers

What is the purpose of the course deviation bar on the horizontal situation indicator?

To display the offset distance from the selected track (A) Signup and view all the answers

What is the purpose of the heading bug on the horizontal situation indicator?

To show the desired heading (D) Signup and view all the answers

What is the source of the aircraft heading information on the horizontal situation indicator?

From different systems, including the inertial navigation system (A) Signup and view all the answers

What is the purpose of the flag with 'mag' or 'true' on the horizontal situation indicator?

To indicate the type of heading displayed (A) Signup and view all the answers

What is the additional feature that an Electronic Horizontal Situation Indicator (EHSI) may offer?

A moving map display with superimposed weather radar information (A) Signup and view all the answers

What is the representation of the aircraft on the horizontal situation indicator?

A small fixed symbol at the centre of the instrument (D) Signup and view all the answers

What happens to the precession force when the turning motion ends?

It is removed (C) Signup and view all the answers

What determines the direction of the pointer's movement?

The direction of turn (C) Signup and view all the answers

What is the purpose of the nozzle in the air-driven turn-and-slip indicator?

To direct air onto the rotor cups (B) Signup and view all the answers

What is the effect of an under-reading rate of turn on the rotor speed?

The rotor speed decreases (B) Signup and view all the answers

What is the function of the regulator in the air-driven turn-and-slip indicator?

To control the rotor speed (B) Signup and view all the answers

What determines the direction of the turn indicated by the pointer?

The position of the restraining spring (C) Signup and view all the answers

What happens when the aircraft is turning too fast for the bank angle?

The ball will move to the outside of the index marks (B) Signup and view all the answers

What is the primary indication of a slipping turn?

The ball drops below the index marks (D) Signup and view all the answers

What is the main difference between a turn coordinator and a turn-and-bank indicator?

The turn coordinator indicates rate of turn but indicates a turn more quickly (D) Signup and view all the answers

What does the rear view of an aircraft symbolize in a turn coordinator?

Alignment of the wings with the horizontal index marks (C) Signup and view all the answers

What is the result of an uncoordinated turn?

The aircraft will skid or slip (C) Signup and view all the answers

What is the purpose of a turn coordinator in small general aviation aircraft?

To replace the turn-and-bank indicator in a number of small types of general aviation aircraft (A) Signup and view all the answers