Control

Question 1

Pulling the control column aft moves the elevator ____ ?

Answer 1

UP

Question 2

Primary effect of elevator

Answer 2

PITCH

Question 3

Secondary effect of elevator

Answer 3

AIRSPEED

Question 4

How does faster airflow effect elevator responsiveness

Answer 4

Better elevator responsiveness
Smaller movements required

Question 5

With a Forward CoG, what effect does this have on the elevator sensitivity?

Answer 5

LESS sensitive

Requires more pilot input to achieve same effect

Question 6

In relation to the elevator, what is a danger on landing with a forward CoG

Answer 6

Not enough elevator authority
Not enough elevator to roll out or maintain nose up

Question 7

What effect does Reward CoG have on elevator

Answer 7

MORE sensitive

Requires less pilot input to achieve same effect

Question 8

In relation to the elevator, what is a danger on take-off with a rearward CoG

Answer 8

Overly sensitive elevator
Over rotation / Tail strike

Question 9

In a roll to the right, what position are the ailerons on the left and right wings

Answer 9

Left wing = Up Going wing = Aileron DOWN
Right wing = Down Going wing = Aileron UP

Aileron down makes more camber, producing more lift, resulting in the outer wing in a roll creating more lift
Review here

Question 10

What type of aileron is defined below

The up-going aileron goes up MORE than the down going aileron, trying to produce more drag

Answer 10

Differential Aileron

Question 11

What type of aileron is defined below

Designed to penetrate into the airflow beneath the wing when the aileron is moved up

Answer 11

Frise Aileron

Small part of the aileron hangs below the wing when it is moved up into the airflow

Question 12

What is the definition of adverse yaw
What causes it to happen

Answer 12

yaw moment towards the upgoing wing

Down going aileron produces more lift than upgoing aileron.
More lift creates more induced drag

Question 13

What are 2 aileron designs to help counteract adverse yaw

Answer 13

1. Differential Aileron
2. Frise Aileron

Question 14

Primary effect of rudder

Answer 14

YAW

Question 15

Secondary effect of rudder

Answer 15

ROLL

Yaw causes one wing to travel faster than the other
Increased speed causes increase lift on the wing traveling faster

Question 16

What does the following define

Small up and down movements felt on the control surface due to airflow

Answer 16

FLUTTER

Question 17

What are 2 methods used for flying control balance

Answer 17

Mass Balance
Aerodynamic Balance

Question 18

Where in relation to the hinge point is a mass balance (horn) situated

Answer 18

IN FRONT

Mass balance is situated infront of the hinge point

Question 19

What are 2 benefits of a mass balance

Answer 19

Alleviate FLUTTER
Alleviate CONTROL HEAVINESS

help reduce flutter at high speed
aid pilot control manipulation at low speed

Question 20

How does an aerodynamic balance work

Answer 20

20% of elevator surface protrudes into airflow below the hinge point
Airflow striking this part of the elevator counter acts the forces of airflow striking the bigger surface area

Review here

Question 21

When the trailing edge of the tailplane moves UP, what tendancy does the nose have

Answer 21

NOSE UP

Question 22

When the trailing edge of the tailplane moves DOWN what tendancy does the nose have

Answer 22

NOSE DOWN

Question 23

What position is the anti-balance tab when the trailing edge of the tailplane is
1. UP
2. DOWN

Answer 23

Trailing edge UP = Anti Balance tab UP = Nose UP
Trailing edge DOWN = Anti Balance tab DOWN = Nose DOWN

Question 24

Aircraft trimming systems apply to which controls, and what is their trim name called

Answer 24

Elevator - Pitch Trim
Rudder - Yaw Trim
Aileron - Roll Trim

Question 25

What are 3 conventional types of trim

Answer 25

1. Fixed
2. Simple
3. Spring loaded

Question 26

Fixed Trim Tabs & Simple Trim Tabs

Which direction will the control surface deflect in relation to the trim tab itself

Answer 26

OPPOSITE DIRECTION

Question 27

General Knowledge

When trimming nose DOWN, the trim tab moves UP into the airflow.
This pushes the elevator DOWN.
Remembering that the tailplane is an upside down wing, this has reduced the camber, reducing lift on the tailplane.
Remember that CoG is typically forward of CoL and has a typical nose down tendancy. This is normally counter acted by tailplane down force.
By reducing downforce on the tailplane, nose down tendancy takes precedence.
Hence, trimming nose DOWN makes the trim tab go UP and elevator go DOWN

Answer 27

When trimming nose UP, the trim tab moves DOWN into the airflow.
This pushes the elevator UP.
Remembering that the tailplane is an upside down wing, this has increased the camber, increasing lift on the tailplane.
Remember that CoG is typically forward of CoL and has a typical nose down tendancy. This is normally counter acted by tailplane down force.
By increasing downforce on the tailplane, nose down tendancy is counteracted.
Hence, trimming nose UP makes the trim tab go DOWN and elevator go UP

Question 28

What are 2 issues of the stabilator Anti Balance Tab

Answer 28

1. No pilot feedback to control loading
2. “snatch” due to airflow changes

Question 29

What is a stabilator

Answer 29

ALL FLYING TAILPLANE

All-moving tail surface