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41 Cards in this Set
- Front
- Back
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What are primary flight controls generally made of |
In light aircraft all aluminum In heavy aircraft composite |
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What is a frise aileron |
ailerons are so shaped that when the aileron goes down, the complete top surfaces of the main plane and the aileron have a smooth, uninterrupted contour, causing little drag. |
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What is a flaperon |
Flaperons are control surfaces on the wing of an aircraft that help to stabilize the plane during low-speed flying during take-off and landing. Flaperons combine the functions of flaps and ailerons. |
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What are differential ailerons |
Function in the same manner as symmetrical ailerons except that the upward deflecting aileron is displaced a greater distance than is the downward deflecting aileron. |
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In an aircraft with servo tabs, putting on a ground lock on the main control surface would it stop you moving the control column |
No. The control column would still move the servo tabs |
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What is the bearing used in fibre pulleys |
Ball bearing |
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What are the signs of pulley wear |
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A universal protractor used to measure degree of travel in an aileron should be zeroed when |
Aileron in the neutral position |
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A flying control static friction check shows |
The force needed to overcome the system interia to move flight controls |
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What is an aileron balance cable for |
The allow the cable to be tensioned |
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With the elevator trim wheel fully aft (nose up) what direction of elevator movement is restricted |
'Up' travel movement is restricted You are already trimming up. |
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On the ground spoilers and speekbrakes deploy to how many degrees |
60 Needed more on ground |
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A horn balance at high speed will |
Increase the degree of movement |
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On an aircraft with elevons if the control column is move forward which way will the elevons move |
Move down |
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Another term for load alleviation |
Symmetrical flight control trim |
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Yaw damper gain increases sensitivity with what |
Increased speed |
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If ground locks we put between balance tabs and the control surfaces what would happen |
You can't move the control column |
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If the flaps are sluggish and erratic on finals what is the probable cause |
Flap motor internal leakage |
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Main purpose if a frise aileron |
Decrease drag on the up going wing The fringe of the down going wings aileron cause more drag on that side |
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Stick shakers activate at what % above stalling speed |
7% |
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A wing mounted stalling vane does what when a stall is impending |
Moves up at impending stall |
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During an autopilot control turn which flight controls move |
All of them Aielrons elevators rudder |
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Mass balance weights are used for what |
Counteract flutter |
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The purpose of the autopilot servomotot torque setting is |
To prevent control surfaces runaway |
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What controls the spoilers |
Aileron control wheel Speed brake lever |
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Differential aileron control gives limits on what travel of the ailerons |
Larger travel on the Up aileron Less travel on the down aileron |
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Pulleys in a flight control system are made of what |
Tufnol or aluminum alloy |
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What is the purpose of balance panels |
Reduce the force needed to move and hold the control surface |
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How do Krueger flaps work |
LE flaps ⬆️ wing area and camber |
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What is the effect of temp changes on rigged controls |
Increase in temp causes an increase in tension |
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What are the advantages of lockclad cables |
Less affected by temp Less stretch |
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What are turnbuckles used for |
Minor adjustment in cable length and cable tension |
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What are spring connectors used for |
Quick disconnection |
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What are primary and secondary stops used for |
Prevent over stress of the control run |
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What is differential aileron travel |
The downward aileron(high wing) doesn't travel as far as the upward aileron(low wing). This stops the aircraft yawning towards the downward aileron (high wing). |
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What is the purpose of bell cranks |
Change direction of motion in a push pull rod system |
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What is aileron lock out |
Use on large aircraft when the outboard ailerons are locked out |
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What is the effect of slots in the TE flap |
Replenish boundary layer. More efficient flap |
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What is the purpose of aileron droop |
To ensures ailerons don't lock up when the wings flex. Give then some slack!! Also ensures they are flared during flight |
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What is the painted line around the end of a swaged cable fitting |
To identify if the swage is slipping |
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Extending a LE slat will change AOA how |
Decrease AOA |
