Flight Controls Flashcards
Which flight controls are normally control tab operated?
The elevator, rudder, and ailerons.
What is the maximum rudder travel?
22 degrees
What is the purpose of the Q-Limiter?
To limit rudder travel as speed increases.
At 177 kts what is rudder movement restricted to?
17 degrees of travel
At 304 kts what is rudder travel limited to?
2.5 degrees progressively
What is the purpose of the yaw damper?
To reduce Dutch roll.
At what point will the gear warning horn sound in regards to the flap handle if the gear are not down, and can this horn be silenced?
20 degrees, it can’t be silenced (B2 8-236)
How is the control wheel connected to the ailerons?
With use of cables that are connected to control tabs.
What links the control wheels together? What is this devices purpose?
A torque tube which allows operation of one control wheel if the other jams. You need at least 50 lbs of force to operate the control wheel when one side is jammed.
If one control tab jams will the other one operate?
Yes
What is the purpose of the control tab?
The purpose of the control tab is to use aerodynamic force to reposition the ailerons appropriately.
Where is the aileron trim tab located in regards to the control tab?
Outboard of the control tabs.
When do the spoilers assist with lateral control?
When the control wheel is moved beyond 5 degrees.
Where are the elevators connected?
At the torque tube, this is the only place on the airplane.
How is the control wheel connected to the elevator?
With use of cables that are connected to the control tabs.
Which tab is the elevator control tab?
The most inboard tab.
What is the purpose of the geared tabs? What are they geared to?
They are used to assist the control tab. Each one is geared to the actual movement of the elevator tab.
Where is the elevator geared tab located?
In the middle.
What is the purpose of the elevator anti-float tabs?
To assist with control during high pitch up, typically beyond 10 degrees.
Where are the elevator anti-float tabs located?
They are the most outboard tabs.
How many elevator trim motors are there in the rudder?
There are two, a primary and alternate.
At what rate do each of the elevator trim motors operate?
1/3 of a degree per sec for the primary. 1/10 of a degree per sec for the alternate.
Which elevator trim motor does the autopilot use?
The alternate trim motor.
Will trim motors overheat and come back?
Yes, prolonged movement or several short rapid bursts of trim will overheat the motor.
Why does the MD80 have engine strakes?
To assist with air flow up around the fuselage.
What are engine strakes heated with?
13th stage bleed air augmented by 8th stage bleed air.
How many takeoff warnings are there and what are they?
Stab trim not set for takeoff Auto brakes not armed Auto spoilers not armed Brakes are set Flaps not set for takeoff Slats not extended Spoiler lever not fully retracted
SAAB FSS
What is the max steering angle with the tiller?
82 degrees
What is the max steering angle with the rudders on the ground?
17 degrees
What activates the autobrakes?
Ground spoiler deployment.
At what speed do the autobrakes switch from max to min?
At 70 kts.
How do you deactivate the autobrakes?
Manual brakes Throttles up Flaps < 28 degrees above 70 kts Stowing the spoilers Switch off
When does the gear warning horn activate that can not be silenced?
Radio altimeter below 1000 ft with thrust at idle and no gear. Flaps beyond 26 degrees with no gear down.
When must the rudder travel illuminate light come on during approach?
It must be on by 144/165 kts for the MD82/MD83 respectively.
If the rudder travel unrestricted light does not come on what limitations apply?
No more that 12 kts of crosswind, and a minimum speed of 135 kts will be used until landing is assured.
