Electrical Rudder Control a330 -300 ( All/m/n/o/p/q/r/s/)
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Questions and Answers

What device controls the green hydraulic servo control under normal operation for rudder ?

  • BCM
  • SEC 1
  • PRIM 1 (correct)
  • PRIM 3

Which PRIM takes control of the yellow hydraulic servo control during normal operation for rudder

  • PRIM 2
  • PRIM 1
  • SEC 1
  • PRIM 3 (correct)

What happens if all three PRIMs fail for rudders ?

  • No control system operates the hydraulic servos.
  • SEC 1 activates the yellow hydraulic servo control.
  • The BLUE servo control is taken over by BCM.
  • The green hydraulic servo control is managed by SEC 1. (correct)

In case of a total electrical failure, or loss of rudder control due to flight control computers failure, , what control does the Backup Control Module (BCM) use if the yellow hydraulic servo control is unavailable?

<p>Blue hydraulic servo control (D)</p> Signup and view all the answers

Which PRIM controls the blue hydraulic servo control during normal operation?

<p>PRIM 2 (D)</p> Signup and view all the answers

What happens to rudder travel deflection as speed increases?

<p>It gradually reduces to avoid high structural loads. (D)</p> Signup and view all the answers

What occurs in the event of a failure that causes loss of the Rudder Travel Limit function?

<p>The rudder deflection limit stops at the last value reached. (D)</p> Signup and view all the answers

When is full rudder authority recovered?

<p>At slats' extension. (A)</p> Signup and view all the answers

What does the available rudder deflection ensure?

<p>It provides sufficient yaw control within the entire flight envelope. (A)</p> Signup and view all the answers

What remains available regardless of the aircraft speed?

<p>Maximum rudder deflection (B)</p> Signup and view all the answers

At what condition is maximum rudder deflection usually reached before full rudder pedal travel?

<p>At low speed (A)</p> Signup and view all the answers

What is the relationship between aircraft speed and maximum rudder deflection?

<p>Maximum rudder deflection remains unchanged regardless of speed (C)</p> Signup and view all the answers

When does full rudder pedal travel become available?

<p>Regardless of aircraft speed (B)</p> Signup and view all the answers

At what speed is maximum rudder deflection typically achieved in relation to rudder pedal travel?

<p>Only at low speeds (B)</p> Signup and view all the answers

What is a key factor concerning maximum rudder pedal travel as speed increases?

<p>Maximum rudder deflection is reached before pedal travel (A)</p> Signup and view all the answers

Which statement is true about maximum rudder deflection at various speeds?

<p>It is typically reached before pedal travel fully engages (B)</p> Signup and view all the answers

How is rudder trim adjusted in manual flight?

<p>Through the RUD TRIM rotary switch (A)</p> Signup and view all the answers

What happens to rudder trim commands when the autopilot is engaged?

<p>They are computed by PRIM and transmitted to SEC (A)</p> Signup and view all the answers

What component is used to reset the rudder trim to zero?

<p>RUD TRIM reset pushbutton (C)</p> Signup and view all the answers

Which motors operate normally for rudder trim during operation?

<p>SEC 1 and MOTOR 1 (B)</p> Signup and view all the answers

artificial feel and rudder trim are achieved by ?

<p>two electric motors that position the artificial feel unit inside PFTU (D)</p> Signup and view all the answers

What mechanism computes rudder trim orders when the autopilot is engaged and what executes ?

<p>PRIM computes transmutes to sec to execute (C)</p> Signup and view all the answers

What happens to the rudder trim switch and reset pushbutton under autopilot operation?

<p>They become inactive. (D)</p> Signup and view all the answers

Which of the following is NOT involved in the rudder trim process while autopilot is engaged?

<p>Rudder trim reset pushbutton (C), Rudder trim switch (D)</p> Signup and view all the answers

Flashcards

Primary Rudder Control

PRIM 1, PRIM 2, and PRIM 3 control respective hydraulic servos (green, blue, yellow).

Secondary Rudder Control

SEC 1 controls the green hydraulic servo if all PRIMs fail.

Total Electrical Failure

Backup Control Module (BCM) takes over rudder control in complete electrical loss.

Backup Control Module (BCM)

Controls the yellow or blue hydraulic servo in electrical failure or flight control computer failure.

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Flight Control Computers Failure

Causes rudder control loss, activating the backup control system.

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Rudder Travel Limit

A system that limits the maximum rudder deflection, decreasing as the aircraft speed increases to prevent structural damage.

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Rudder Travel Limit Failure

If this system fails, the rudder will be limited to the last deflection value reached before failure.

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Slats Extension and Rudder Authority

Extending the slats fully restores the rudder's full deflection capabilities.

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Rudder Deflection for Yaw Control

The available rudder deflection provides sufficient control for yawing the aircraft within all flight conditions, including maximum engine thrust differences.

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Asymmetric Thrust

A situation where one engine produces significantly more thrust than the other, causing the aircraft to yaw (turn).

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Rudder Pedal Travel

The amount of movement of the rudder pedals in the cockpit. It remains constant across all aircraft speeds.

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Rudder Deflection

The actual angle of the rudder in relation to the aircraft. It increases with airspeed, but reaches a maximum before full pedal travel.

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Sideslip

A technique used to control yaw by intentionally tilting the aircraft sideways, reducing the need for rudder input.

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Low Speed Rudder

At low speeds, the rudder reaches its maximum deflection at the same time as full pedal travel.

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High Speed Rudder

At high speeds, the rudder reaches its maximum deflection before full pedal travel.

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Rudder Deflection Limit

The maximum angle the rudder can reach, preventing structural damage during high speeds.

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Rudder Deflection vs. Pedal Travel

At high speeds, the rudder reaches its maximum deflection before the rudder pedals are fully pushed.

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Rudder Deflection and Speed

Rudder deflection changes with airspeed, reaching its maximum before full pedal travel at high speeds.

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Rudder Trim

A system that adjusts the rudder's position to counteract forces that cause the aircraft to yaw, like wind or engine asymmetry. It can be controlled by the pilot manually or by the autopilot.

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Artificial Feel Unit

A device in the PFTU (Primary Flight Control System) that provides the pilot with artificial feedback when using the rudder pedals. It simulates the feeling of pressure on the rudder.

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Rudder Trim Reset

A button on the RUD TRIM panel that returns the rudder trim setting to zero.

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Rudder Trim in Autopilot

The autopilot automatically calculates and adjusts the rudder trim to maintain a straight flight path without pilot input.

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Rudder Trim Synchronization

In normal operation, two separate electric motors (SEC 1/MOTOR 1 and SEC 2/MOTOR 2) work together to control the rudder trim, with one acting as a backup to the other.

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Rudder Trim Orders

In autopilot mode, the PRIM (Primary Rudder Control) calculates and sends rudder trim orders to the SEC (Secondary Rudder Control) for actuation.

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Inactive Rudder Controls

When autopilot is engaged, the pilot cannot manually adjust the rudder trim using the rudder trim switch or reset button.

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Rudder Trim Actuation

The SEC (Secondary Rudder Control) receives rudder trim orders from the PRIM and actuates the rudder to the calculated position.

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PRIM and SEC in Rudder Trim

PRIM calculates rudder trim adjustments, while SEC executes them, ensuring the aircraft stays on course.

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Study Notes

Electrical Rudder Control

  • Primary control (PRIM 1, 2, and 3) operates hydraulic servos.
    • PRIM 1 controls green servo.
    • PRIM 2 controls blue servo.
    • PRIM 3 controls yellow servo.
  • Secondary control (SEC 1) takes over if all PRIMs fail; it controls green servo.
  • Backup Control Module (BCM) takes over if electrical system fails or flight control computers fail.
    • BCM controls yellow servo in priority.
    • BCM controls blue servo if yellow servo is unavailable.

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Description

Test your knowledge on the electrical rudder control systems. This quiz covers the operation of primary, secondary, and backup control modules in hydraulic servo systems. Understand how each component interacts and prioritizes for optimal performance.

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