Aircraft Systems: Flight Control Systems Summary
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Questions and Answers

What is the main purpose of the primary flight control systems in a commercial aircraft?

  • To control the aircraft's fuel and hydraulic systems
  • To control the aircraft's safe flight during various maneuvers (correct)
  • To control the aircraft's thrust and engine power
  • To control the aircraft's electrical systems

What type of motion is defined as the movement of the aircraft from one point to another in space?

  • Pitch motion
  • Yaw motion
  • Translational motion (correct)
  • Rotational motion

What are the three main axes around which the aircraft experiences rotational motion?

  • Pitch, yaw, and power
  • Pitch, roll, and yaw (correct)
  • Lift, drag, and thrust
  • Pitch, roll, and thrust

How are the primary flight control surfaces, such as ailerons, elevator, and rudder, attached to the aircraft's airframe?

<p>They are attached to the airframe on hinges or tracks so that they can deflect the airstream. (C)</p> Signup and view all the answers

Which of the following is not considered a primary flight control system in a commercial aircraft?

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

What is the purpose of the primary flight control systems in controlling the aircraft's motion?

<p>To control the aircraft's translational and rotational motion (B)</p> Signup and view all the answers

What does FADEC stand for in the context of aircraft engines?

<p>Full Authority Digital Engine Control (C)</p> Signup and view all the answers

In an aircraft with a fixed-pitch propeller, how does the pilot control the propeller rotational speed?

<p>By adjusting the throttle/power lever based on RPM indicator readings (D)</p> Signup and view all the answers

What is the purpose of secondary flight controls in an aircraft?

<p>To improve aircraft performance characteristics or relieve control loading (D)</p> Signup and view all the answers

What is the role of FADEC in modern jet aircraft?

<p>Controlling all aspects of engine performance digitally (B)</p> Signup and view all the answers

What does the term 'Vent Systems' refer to in aircraft fuel management systems?

<p>Mechanisms for venting trapped air from fuel tanks (D)</p> Signup and view all the answers

Why is hydraulic power essential in most modern aircraft?

<p>To assist in landing gear retraction and extension (C)</p> Signup and view all the answers

Flashcards

Primary flight control systems purpose

To control safe flight during maneuvers.

Translational motion definition

Aircraft movement from one point to another in space.

Aircraft rotational axes

Pitch, roll, and yaw.

Primary flight control surface attachment

Attached via hinges or tracks to deflect airflow.

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Non-primary flight control system

Flaps.

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Primary flight control motion control

Both translational and rotational motion.

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FADEC meaning

Full Authority Digital Engine Control.

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Fixed-pitch propeller control

Throttle/power lever adjusts RPM.

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Secondary flight controls purpose

Improve performance or reduce control strain.

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FADEC jet aircraft role

Digitally controls engine performance.

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Vent Systems function

Vents trapped air from fuel tanks.

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Hydraulic power's role in aircraft

Assists in landing gear operation (retraction/extension).

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Study Notes

Aircraft Systems

Flight Control Systems

  • Aircraft motion is defined by translational motion and rotational motion around a fixed set of axes (pitch, roll, and yaw)
  • Primary flight control systems consist of ailerons, elevator, and rudder, which are attached to the airframe on hinges or tracks to deflect the air stream and generate an unbalanced force to rotate the plane
  • Secondary flight controls improve aircraft performance characteristics or relieve excessive control loading, and include high lift devices, flight spoilers, and trim systems

Engine Control Systems

  • Aircraft engine controls allow the pilot to control and monitor the operation of the powerplant
  • In fixed-pitch propeller aircraft, propeller rotational speed depends on airspeed and loading, and the pilot adjusts the throttle/power lever to maintain desired constant speed
  • In jet aircraft, FADEC (Full Authority Digital Engine Control) employs a digital computer to control all aspects of engine performance
  • FADEC replaces analog electronic controls and is used in modern commercial and military aircraft

Fuel Systems

  • Modern aircraft fuel management systems may include fuel pressurization, engine feed, fuel transfer, refuel/defuel, fuel storage, vent systems, use of fuel as heat sink, and fuel jettison
  • Fuel systems vary from aircraft to aircraft, and the storage and assured supply of fuel during flight are critical issues
  • Typical fuel system components include filters, drains, fuel vents, and aerial refueling systems

Hydraulic Systems

  • Most aircraft today require hydraulic power for various tasks
  • Hydraulic systems are used to power various aircraft functions, including landing gear, brakes, and flight control systems

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Description

Explore the principles and components of flight control systems in aircraft, covering topics such as translational and rotational motion. Learn about the different systems including engine control, fuel, hydraulic, and electrical systems. This quiz provides a summary discussion on the fundamental aspects of aircraft systems.

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