Flight Controls Flashcards
What are the primary flight controls on the T-6B?
conventional ailerons, elevator, and rudder.
What are considered secondary flight controls on the T-6B?
electrically actuated pitch/roll/yaw trim systems and a rudder trim aid device (TAD)
How do you control pitch and roll trim?
With a combined aileron/elevator trim switch on each control grip
How do you control rudder trim?
With the rudder trim switch located on each PCL
Which pilot has priority if both are putting in trim inputs at the same time?
The rear cockpit trim inputs will be given priority
What are two ways to stop runaway trim?
Pressing and holding the trim interrupt button or activating the trim disconnect switch will remove power from all trim actuators and disengage the trim aid device (TAD).
What indications will you get if you activate the trim disconnect switch?
Green TRIM OFF and TAD OFF advisories on EICAS
What depicts the aircraft trim condition?
Triple-trim indicators on the left console in each cockpit
How do you know if trim is within the acceptable range for takeoff?
Green bands for each trim axis depict takeoff trim on the triple-trim indicator
What pairs the front and rear control sticks?
An interconnect tube.
How are the ailerons mass balanced?
Weights on the leading edge of each aileron
How is aileron trim accomplished in the T-6B?
An electromechanical actuator installed in the center wing is connected to a spring box assembly and the centerline bellcrank to provide aileron roll trim by actually moving the ailerons. (NOT the ground adjustable trim tabs)
Who can adjust the trim tabs on the ailerons?
Maintenance
How is the elevator mass balanced?
weights in the elevator horns.
What provides control feel for the elevator?
Downsprings fitted to the elevator bellcrank and a bobweight installed on the front control stick
What component in the elevator control system helps prevent overstressing the airframe?
The bobweight on the front control stick does this by increasing stick forces as G-load on the aircraft increases.
How is elevator trim accomplished in the T-6B?
An electromechanical actuator which drives a tab surface installed on the right side of the elevator
How do you adjust rudder pedal position?
Handcrank located on the center console of each cockpit
How is the rudder mass balanced?
With a balance weight installed in the rudder horn
How is rudder trim accomplished in the T-6B?
An electromechanical actuator located in the vertical stabilizer drives an anti-servo tab surface on the trailing edge of the rudder.
What is the purpose of the rudder trim aid device (TAD)?
The TAD assists directional trimming during airspeed and power changes
What does the TAD sense?
engine torque
altitude
airspeed
pitch rate
What indication will you get if the trim aid device is disengaged?
a green TAD OFF advisory on EICAS
What indication will you get if the TAD system fails internally?
An amber TAD FAIL caution on EICAS
What affect does pressing the trim disconnect or activating the trim disconnect switch have on the TAD?
It will cause the TAD to disengage, the TRIM AID switch to move to OFF, and the TAD OFF advisory is displayed on EICAS
How do you reset the system if you have a TAD FAIL message?
Set the TRIM AID switch to OFF and then back to TRIM AID.
How is takeoff trim for the rudder set?
The TAD automatically sets takeoff trim when it is switched on after engine start.
When will the TAD change trim settings after setting trim for takeoff?
When the aircraft exceeds 80 KIAS and there is no weight on wheels (WOW)
Does the TAD trim the aircraft perfectly in the yaw axis?
No, pilot input is still necessary.
What does the Gust lock do?
Locks the aileron and rudder in the neutral position, and the elevator in a nose-down configuration when the aircraft is parked.
How is the gust lock set?
Lift the spring-loaded yoke on the center console, position the control stick so that the gust lock yoke can engage an adapter on the control stick, and lower the yoke to the lock position on the column.
How does the gust lock engage the rudder?
A flexible cable, connected to a latch assembly locks the rudder cable when the gust lock yoke is lifted.
How is the gust lock disengaged?
Lift the yoke, move the control stick to the side and then aft ,and lower the yoke to the stowed position
What might happen if the gust lock is not properly stowed?
It may prevent flight controls from operating and may result in damage to the flight control assemblies
