Roll control - A330
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Questions and Answers

What is the maximum deflection angle of the ailerons?

  • 30 °
  • 25 ° (correct)
  • 15 °
  • 20 °

How many spoilers are on each wing of the aircraft?

  • 10
  • 2
  • 5 (correct)
  • 7

What happens to the ailerons when the flaps are extended?

  • They extend (aileron droop) (correct)
  • They detach from the wing
  • They remain static
  • They retract

Which control surfaces aid in controlling the aircraft about the roll axis?

<p>Two ailerons and five spoilers (B)</p> Signup and view all the answers

Which computers primarily control the inner ailerons?

<p>PRIM 1 and PRIM 2 (C)</p> Signup and view all the answers

What provides backup control for the inner ailerons in case of PRIM failure?

<p>SEC 1 and SEC 2 (C)</p> Signup and view all the answers

Which PRIM computer is responsible for controlling the outboard ailerons?

<p>PRIM 3 (B)</p> Signup and view all the answers

Which spoilers are controlled by the SECs?

<p>N° 3 and 6 spoilers (D)</p> Signup and view all the answers

What happens if PRIM 3 fails for outboard ailerons?

<p>SEC 1 and 2 activate (D)</p> Signup and view all the answers

What control mode do the servojacks use when the respective computer fails for ailerons

<p>Damping mode (D)</p> Signup and view all the answers

What is the condition under which the outboard ailerons are controlled to zero deflection?

<p>Above 190 kt in CONF 0 (D)</p> Signup and view all the answers

What do the outer ailerons automatically switch to when hydraulic power consumption needs to be reduced?

<p>Damping mode (D)</p> Signup and view all the answers

Which condition leads to the activation of damping mode for the servojacks?

<p>Both B and C (D)</p> Signup and view all the answers

How many control modes do the servojacks possess?

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

What speed limit is applied to the use of outboard ailerons in autopilot mode during certain failure cases?

<p>300 kt (C)</p> Signup and view all the answers

What happens to the spoilers if the system loses hydraulic pressure?

<p>They maintain their current deflection or lesser due to aerodynamic forces. (C)</p> Signup and view all the answers

What occurs if a spoiler surface on one wing fails?

<p>The opposite spoiler surface on the other wing is inhibited. (C)</p> Signup and view all the answers

Which hydraulic systems can supply power to the servojack?

<p>Green, yellow, and blue systems. (D)</p> Signup and view all the answers

What is the function of the servojack in relation to spoilers?

<p>To position each spoiler and respond to control signals. (A)</p> Signup and view all the answers

What occurs if the system detects a fault or loses electrical control?

<p>Spoilers automatically retract to their zero position. (A)</p> Signup and view all the answers

Flashcards

Aileron Deflection

The maximum angle ailerons can move is 25°.

Spoiler Deflection

Spoilers can move up to 35°.

Aileron and Spoiler

Used for rolling an aircraft.

Aileron Droop

Ailerons are extended when flaps are extended.

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Role of Controls

Ailerons and spoilers are wing controls that adjust the aircraft's roll, a critical maneuver.

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Aileron Control

Inner ailerons are controlled by two primary computers (PRIM 1 & 2), each capable of controlling both sides. Secondary computers (SEC 1 & 2) provide backup if the primary computers fail.

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Outboard Aileron Control

Outboard ailerons are primarily controlled by PRIM 3, with SEC 1 & 2 as backup.

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Spoiler Control

Secondary computers (SEC 1 & 2) control the number 3 and 6 spoilers, while primary computers (PRIM 1, 2, & 3) control number 2, 4, and 5 spoilers.

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What happens if PRIM 1 fails?

SEC 1 and SEC 2 take over control of the inner ailerons.

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What do ailerons and spoilers do?

Ailerons control roll (turning the aircraft left or right), and spoilers are used for braking and reducing lift.

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What controls ailerons?

Two electrically-controlled hydraulic servojacks drive each aileron, with each servojack having two control modes: active (electrically controlled) and damping (follows surface movement).

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How does the system select damping mode?

The system automatically switches to damping mode if there's low hydraulic pressure (green/yellow or blue/green) or if the respective computer fails.

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What happens to outboard ailerons at high speed?

At speeds above 190 knots (in CONF 0), the outboard ailerons are controlled to zero deflection.

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How are outboard ailerons used in autopilot?

In some failure cases, while in autopilot mode, the outboard ailerons are used up to 300 knots.

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Why are outer ailerons in damping mode when using the RAT?

When the emergency generator is powered only by the RAT (Ram Air Turbine), the outer ailerons are controlled in damping mode to reduce hydraulic power consumption.

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Outboard Ailerons in Autopilot

In some failure scenarios, while in autopilot mode, the outboard ailerons can be used up to 300 knots to assist with aircraft control.

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Why Use Outboard Ailerons?

In certain autopilot failure cases, the outboard ailerons can be used to help maintain control of the aircraft, even at high speeds.

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Outboard Aileron Limit

The outboard ailerons can be used up to a speed of 300 knots in autopilot mode during specific failure scenarios.

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Outboard Aileron Function

The outboard ailerons help control the aircraft's roll, which is the movement of the aircraft around its longitudinal axis.

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Outboard Aileron Emergency

The use of outboard ailerons in autopilot mode signifies a failure scenario where the autopilot needs additional help to maintain control.

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Spoiler System Fault

If the spoiler system detects a fault or loses electrical control, the spoilers automatically retract to their zero position.

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Spoiler Hydraulic Pressure Loss

If the spoilers lose hydraulic pressure, they retain their current deflection or a lesser deflection due to aerodynamic forces.

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Spoiler Symmetry

If a spoiler surface on one wing fails, the symmetrical one on the opposite wing is inhibited, except for spoilers 4 and 6.

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Spoiler Control Systems

Each spoiler is controlled by a servojack that is powered by either the green, yellow, or blue hydraulic system.

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Who Controls Spoilers?

The PRIM (primary) or SEC (secondary) computer systems control the hydraulic systems that power the spoilers.

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Study Notes

Aircraft Control Surfaces

  • Ailerons and spoilers control roll (rotation) of the aircraft.
  • Two ailerons and five spoilers per wing are used.
  • Aileron maximum deflection: 25°.
  • Spoilers have a maximum deflection of 35°.
  • Ailerons extend with flaps (aileron droop).

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Description

This quiz covers the fundamental aspects of aircraft control surfaces, specifically focusing on ailerons and spoilers. You'll learn how these components affect the roll and rotation of the aircraft and their maximum deflection capabilities. Perfect for aviation enthusiasts and students alike!

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