Turbine Autopilot Interlock Schematic Quiz and Flashcards

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Questions and Answers

What happens to the lift produced when a control surface is deflected down?

It decreases

It becomes zero

It increases (correct)

It remains the same

What is the primary function of the ailerons in an aircraft?

To control the yaw attitude

To control the airspeed

To control the roll attitude (correct)

To control the pitch attitude

Where are the ailerons typically located on the wing?

At the midpoint of the wing

Near the wing root

Near the wing tip (correct)

At the leading edge of the wing

What happens when the left aileron is raised?

The right aileron is lowered Signup and view all the answers

How do spoilers operate in relation to ailerons?

They operate on the same principle, but only extend upwards Signup and view all the answers

What is the effect of moving the control column to the left?

The aircraft will bank to the left Signup and view all the answers

What is the primary function of the engage interlock relay in the autopilot system?

To provide power to the autopilot's servo clutches Signup and view all the answers

What is the purpose of the Mach trim coupler relays in the autopilot system?

To ensure the serviceability of the Mach trim system Signup and view all the answers

What happens when the engage switch is moved to autopilot?

The engage interlock relay is energised, providing power to the servo clutches Signup and view all the answers

What is the function of the captain and co-pilot disengage button switches?

To disengage the autopilot in case of a malfunction Signup and view all the answers

What happens when there is a loss of power or operation of a disengage switch?

The engage interlock relay relaxes, causing the autopilot to disengage Signup and view all the answers

What is the purpose of the turn control switch being in detent?

To ensure the autopilot maintains the aircraft's initial attitude Signup and view all the answers

What is the function of the autothrottle in an aircraft?

To maintain airspeed through thrust control Signup and view all the answers

What is the role of the thrust management computer in an aircraft with digital fuel control?

To program the power setting of each engine Signup and view all the answers

How is the autothrottle output controlled on aircraft with mechanical fuel control?

Through a single servo motor to position the thrust levers collectively Signup and view all the answers

What is the condition for the autothrottle engage switch to be magnetically held in the on position?

If the autothrottle engage interlocks are valid Signup and view all the answers

What is the purpose of the green light next to the autothrottle engage switch?

To indicate the autothrottle is engaged Signup and view all the answers

When can the autothrottle be selected on an aircraft?

Only when the autopilot is engaged Signup and view all the answers

What happens to the outside wing as the airplane yaws?

Its speed is effectively increased Signup and view all the answers

What is the purpose of a yaw damper control system?

To automatically control the yawing of the airplane Signup and view all the answers

What is the advantage of hydraulically operated control surface actuators?

They require less effort to move the control valve spool Signup and view all the answers

What is the purpose of an artificial feel unit?

To replicate the opposition forces of a mechanically driven control surface Signup and view all the answers

Why is it important for pilots to feel the aerodynamic loading on the flight controls?

To properly and safely operate the aircraft Signup and view all the answers

What is the artificial feel system shown for?

Providing elevator feel Signup and view all the answers

What is the primary purpose of the aerodynamic feedback in an autopilot system?

To form an essential part of the autopilot's successful operation Signup and view all the answers

What happens when an aircraft flying with the autopilot engaged drifts from its original attitude?

A sequence of events occurs, involving the gyro stabilisation signal, amplifier, and follow-up system Signup and view all the answers

What is the purpose of the follow-up system in an autopilot?

To counter the input signal and reduce the amplifier output to zero Signup and view all the answers

Why do ground engineers encounter unusual responses during maintenance on an autopilot system?

Because the system is in an open-loop configuration Signup and view all the answers

What is the purpose of the correction unit in an autopilot system?

To move the control surface to correct the aircraft's attitude Signup and view all the answers

What is the result of the follow-up system countering the input signal in an autopilot?

The control surface movement stops Signup and view all the answers

Study Notes

Control Surfaces

Deflecting control surfaces changes the shape of the aerofoil, affecting lift production
Downward deflection increases lift, while upward deflection decreases lift

Primary Control Surfaces

Ailerons control roll attitude and are operated by sideways movement of the pilot's control column
Located on the trailing edge of the wing near the wing tip for greater leverage
Connected in opposition to each other, with one raised and the other lowered to create roll

Spoilers

Can be used as a substitute for ailerons, operating on the same principle
Only extend upwards, unlike ailerons

Autopilot Engagement

Requires captain and co-pilot disengage button switches to be closed
Power monitoring relays, mach trim coupler relays, auto-trim cut-out switch, and vertical gyro contacts must be closed
Turn control switch must be in detent, and mode selector switch must be in MAN
Engagement of autopilot energizes the engage interlock relay, providing power to servo clutches and the engage switch hold-in coil

Autothrottle

Designed to operate with autopilot to maintain aircraft speed and vertical path from take-off to landing
Maintains airspeed through thrust control when autopilot is controlling vertical path
Can be selected by a switch on the autopilot mode select panel when autopilot is engaged

Yaw Damper Control System

Automatically controls yawing of the airplane
Used to counteract effects of yaw on lift and roll

Artificial Feel System

Replicates opposition forces that occur in mechanically driven control surfaces
Provides the pilot with a sense of aerodynamic loading on the flight controls

Autopilot Servo Loops

Closed-loop system relies on aerodynamic feedback for successful operation
Lack of aerodynamic feedback (open-loop) can cause unusual responses during maintenance

Autopilot Operation

Autopilot uses external inputs, such as heading hold or Autoland function
Aerodynamic feedback is essential for successful operation of the autopilot

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Description

Learn about the conditions required to engage the autopilot system in a turbine aeroplane, including the status of captain and co-pilot disengage button switches, power monitoring relays, and other system components. Test your knowledge of aeroplane systems and CASA Part 66 regulations. This quiz is part of a comprehensive training program for aviation professionals.

Autopilot Interlock Schematic for Turbine Aeroplane

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