Primary Flight Controls Flashcards
What is a manual control system?
Control surfaces are mechanically connected to control imputs.
Whats a power assist control system? What is used to assist?
Hydraulic pressure used to assist.
What is a fully powered flight control?
Electro-hydraulic actuators command flight controls.
What control systems are reversable?
Manual and power assist.
What control system is irreversible?
Fully powered.
What are two factors that increase control force in regards to natural feel.
- Increased speed 2. Increased deflection.
Why do we have yaw dampers?
Dutch roll.
Why do we have rudder ratio changers?
Changes the range of deflection based on forward speed.
What does a q system feel sense?
Dynamic pressure.
Whats a method of counteracting adverse aileron yaw?
Rudder or move the alerion higher up then down.
What do roll spoilers prevent compared to ailerons?
Adverse aileron yaw.
To limit the range of movement available on the control surface, what are fitted?
Primary control stops.
To limit the range of movement avalibke secondary control stops are used. Where are they located?
On the flight controls.
Where are primary control stops located?
Control surface.
If the elevator is up, what position is the trim tab?
Down.
What does ths stand for ?
Trim able horizontal stabiliser.
Whats a blow back device?
Prevent overstress.
Fly by wire is a what type of system?
Irreversible.
Is fly by wire heavier or lighter than conventions control systems?
Lighter.
Primary Computers ‘vote’ by blank their blank– only the most valid calculation is used as an output
signal
Comparing their calculations.
What type of flyby wire law is– Full suite of protection features and normal aircraft operating limits
Normal law
What law on flyby wire is - Basic range of stabilities with the protections lost.
Alternate law
What type of law in flyby wire is the following - Any input into the sidestick translates to direct movement on the control surface; no stabilities or protections.
Direct law
What law in flyby wire is - Sidestick and Flight Control Computers lost; Pitch via the trim wheels and yaw from rudders.
Mechanical law.
How do you prevent a stabiliser or aileron moving in the wind on the ground?
Ground lock.
Whilst flying an Airbus fitted with FBW flight controls, you encounter windshear. What should you do with the sidestick? Pull the stick…
all the way back, and keep it fully back.
Trailing edge flaps on large transport aircraft are normally powerd blank with blank back-up.
Hydraulically with electrical.
Which of these statements about a gust lock system are correct?
- There should be suitable design precautions to prevent flight with the gust lock engaged
- There is no need for a gust lock on reversible flight controls
1 correct 2 incorrect
What does a fully powered system require compared to a partially-powered system?
Artificial feel system.
A flight control surface actuator is said to be “irreversible” when…
there is no feedback to the pilot`s controls of the aerodynamic forces acting on the control surface.
Which of these statements are correct, as regards trimming in an irreversible flight control system of a conventional aeroplane equipped with a trimmable horizontal stabiliser?
- The zero force position of the control column changes when using the pitch trim
- The zero force position of the control wheel changes when using the aileron/rudder trim
1 incorrect 2 correct
An aeroplane equipped with irreversible flight controls requires what?
An artificial feel system
If a higher pressure is needed within the canin, what will happen to the outflow valve?
It will close.
The purpose of the pack cooling fans in the air conditioning system is to supply the heat exchangers with cooling air during
Slow flight and ground opps
The most common method for anti-icing the wings of large jet transport aeroplanes in flight is…
Hot air.
True or false : The resulting control input of a dual control input from both sidesticks is electronically limited to the maximum deflection limit of one sidestick
True
True or false : Under direct Law, roll and pitch augmentation are lost but you still have aural and visual alerts.
True or false : A rudder ratio changer system limits both rudder and rudder pedal deflection as the IAS increases.
False - yes for the rudder but not for rudder pedals
The rudder is trimmed in a fully powered flight control system by… altering the neutral position of the
Artificial feel unit.
How can sufficient control-capability be maintained in case of a malfunction/jam in the flight control system? Add multiple blank.
Add multiple acuators.
During final approach in a jet aircraft with Fly-By-Wire flight controls, ATC instructs you to go around as there is still an aircraft on the runway. In the cockpit, the term “alpha floor” is mentioned. What will alpha floor protection do?
Increase thrust to reduce stall
What is the function of the hydraulic control valves in a fullypowered flight control system? The control valves control the movement of the hydraulic blank.
Accuators
How does a pilot disconnect the autopilot in an aircraft equipped with a sidestick?
1- By pushing or pulling the sidestick hard
2- By pressing the A/P button on the glareshield
3- By pressing the takeover pushbutton
4- By moving the thrust levers
123
An aircraft is powered down, and the rudder is at full left deflection, but the rudder pedals are centred. What can we say about the aircraft’s control system? Reversible/irreversible flight controls
Irreversible
An electrical connection from the Fly-By-Wire (FBW) system to the left-hand aileron has become broken in flight. How can directional control be maintained? Through a second/separate identical, actuator.
Seperate
Blank controls allow the pilot to feel some of the actual aerodynamic loads of the control surface.
Partially powered
What are the advantages of Fly-By-Wire control?
- Reduction of the electric and hydraulic power required to operate the control surfaces
- Lesser sensitivity to lightning strike
- Direct and indirect weight saving through simplification of systems
- Immunity to different interfering signals
- Improvement of piloting quality throughout the flight envelope
35
In a Fly-By-Wire (FBW) aircraft controlled by sidesticks, how can a pilot lock out the flight control inputs of the other pilot? By performing a blank blank on the sidestick priority button.
Long push
On a large transport aeroplane, the auto-slat system…
Extends slats when large aoa is detected
