Flight Controls

Question 1

what is rotation around the lateral axis known as?

Answer 1

pitch

Question 2

what is rotation around the longitudinal axis known as?

Answer 2

roll

Question 3

what is rotation around the vertical/normal axis known as?

Answer 3

yaw

Question 4

what motion does the elevator control?

Answer 4

pitch

Question 5

what motion do the ailerons control?

Answer 5

roll

Question 6

what motion does the rudder control?

Answer 6

yaw

Question 7

what are the two types of elevators?

Answer 7

normal and all-moving tailplane

Question 8

what is the secondary effect of roll?

Answer 8

yaw

Question 9

what is the secondary effect of yaw?

Answer 9

roll

Question 10

to roll to the left, the left aileron goes (up/down) and the right aileron goes (up/down)

Answer 10

up, down

Question 11

roll - (slip/skid) - yaw

Answer 11

slip

Question 12

yaw - (slip/skid) - roll

Answer 12

skid

Question 13

what is a differential aileron?

Answer 13

an type of aileron which where the up aileron rises more than the down aileron drops, reducing the difference in drag

Question 14

what is a frise-type aileron?

Answer 14

an aileron which drops the front edge of the up aileron in order to balance the generation of drag

Question 15

slipstream rotates (clockwise/anticlockwise)

Answer 15

clockwise

Question 16

slipstream results in the nose yawing (left/right)

Answer 16

left

Question 17

what is a canard configuration?

Answer 17

a control configuration where the horizontal stabiliser is in front of the wings

Question 18

what is a vee (butterfly) tail?

Answer 18

a control surface which combines the elevator and rudder

Question 19

what are elevons?

Answer 19

a control surface which combines the elevator and the ailerons

Question 20

what are tailerons?

Answer 20

elevons but on the tailplane

Question 21

what is a trim tab?

Answer 21

a tab that usually opposes the elevator (occasionally on more advanced aircraft also ailerons and rudders) to relieve the pilots of an excess of stick feel

Question 22

why are inset hinges used?

Answer 22

to move the CoP closer to the hinge line, lessening the stick feel

Question 23

what is are the types of horn balance? why are they used?

Answer 23

unshielded and shielded horns are used to reduce the distant between the CoP and the hinge line, decreasing stick feel

Question 24

a balance tab goes in the (same/opposite) direction of the control surface, which automatically moves with the control surface in order to (aid/lessen) its motion

Answer 24

opposite, aid

Question 25

what is flutter?

Answer 25

a high speed vibration or oscillation of a control surface which can severely damage the aircraft

Question 26

what is flexural flutter?

Answer 26

when the control surface lags behind the motion of an aerofoil, which increases wing flex when hit by gusts of wins

Question 27

what is tortional flutter?

Answer 27

when the wing twists around its lateral axis. occurs more heavily on the control surface than on the aerofoil

Question 28

mass balancing is placing a ___ on the control surface, moving the CoG (closer to/further from) the hinge line, to reduce flutter

Answer 28

weight, closer