Quiz

Question 1

Chord

Answer 1

The straight line distance from the leading to the trailing edge of an airfoil

Question 2

Camber

Answer 2

The curvature of an airfoil

Question 3

Relative wind

Answer 3

The oncoming airflow as seen by the airfoil

Question 4

Angle of Attack

Answer 4

the acute angle formed between the chord line and the relative wind

Question 5

Angle of incidence

Answer 5

the acute angle formed between the chord line and the longitudinal axis

Question 6

Bernoulli’s Principle

Answer 6

Pressure is inversely proportional to velocity when fluid flowing through a tube passes through a constriction

Question 7

Forces Affecting Flight

Answer 7

Gravity (or weight)
Lift
Thrust
Drag

Question 8

Lift (3)

Answer 8

Produced when an airfoil meets the relative wind at a small angle of attack

The force which opposes gravity

An increase in lift will always be associated with an increase in drag

Question 9

Thrust (2)

Answer 9

Forward propulsive force provided by engines

The center of thrust is located below the center of drag

Question 10

Drag

Answer 10

Resistance to forward motion caused by friction between air and aircraft

Question 11

Types of Drag

Answer 11

Induced Drag
Parasite Drag

Question 12

Induced Drag

Answer 12

Drag caused by the production of lift

Question 13

Parasite Drag

Answer 13

Drag caused by non lift producing structures ( wheels, struts, windscreen, etc…)

Question 14

Equilibrium

Answer 14

A condition where lift equals gravity and thrust equals drag

Aircraft is in a straight line and level flight at a constant speed

Question 15

Longitudinal Axis

Answer 15

Runs from the nose to the tail

Question 16

Lateral Axis

Answer 16

Runs from wing tip to wing tip

Question 17

Vertical Axis

Answer 17

Runs from the belly to the top

Question 18

Axis Intersection

Answer 18

At the center of gravity

Question 19

Ailerons

Answer 19

Controls “roll,” motion around the longitudinal axis

Question 20

Ailerons Location

Answer 20

Located at the trailing edge of the wind near the wing tips

Question 21

Ailerons Operation

Answer 21

Rotation of the control wheel or side to side motion of the control stick

Question 22

Control Stick Left

Answer 22

Left aileron up, right down

Question 23

Control Stick Right

Answer 23

Right aileron up, left down

Question 24

Ailerons Differential

Answer 24

A rigging that causes the upward moving aileron to deflect farther than the downward moving aileron

Question 25

Elevators

Answer 25

Controls “pitch,” motion around the lateral axis

Question 26

Elevators Location

Answer 26

Located at the trailing edge of the horizontal stabilizer

Question 27

Elevators Operation

Answer 27

Forward or Reward motion of the wheel or stick

Question 28

Control Stick Forward

Answer 28

Elevator down, nose down

Question 29

Control Stick Rearward

Answer 29

Elevator up, nose up

Question 30

Elevators Function

Answer 30

Changes the angle of attack, which changes lift and drag

The elevator is the primary speed control

Aircraft climbs or descends primarily as the result of power changes

Question 31

Rudder

Answer 31

Controls “yaw,” motion around the vertical axis

Question 32

Rudder Location

Answer 32

Located on the trailing edge of the vertical stabilizer

Question 33

Rudder Operation

Answer 33

Operated by the rudder pedals

Left Foot = left rudder

Cancels the unequal drag caused by aileron deflection

Question 34

Rudder Function

Answer 34

Streamlines fuselage

Reduces drag and improves the quality of a turn, but does not turn the aircraft

Question 35

Longitudinal Stability

Answer 35

Stability around the lateral axis

Question 36

How is Longitudinal Stability Achieved?

Answer 36

Maintaining the center of lift behind the center of gravity on the aircraft wing nose heavy

Question 37

Lateral Stability

Answer 37

Stability around the longitudinal axis

Question 38

How is Lateral stability achieved?

Answer 38

Lateral stability is maintained by wing dihedral

Question 39

Wing Dihedral

Answer 39

The upward bend or the wings stretching out from the wing base to the wing tip

Question 40

Wing Dihedral Benefit

Answer 40

Gives the aircraft the tendency to return wings to level after rolling

Question 41

Flaps

Answer 41

Deployed to increase the camber of the airfoil

Question 42

Flaps Benefits

Answer 42

Increases lift and drag

Reduces stall speed for reduced landing speed or takeoff roll

Question 43

Plain flaps

Answer 43

Hinged at the trailing edge of the wing

Will move down and into airflow (least efficient)

Question 44

Split Flap

Answer 44

Section of the lower wing surface hinged forward of trailing edge

Question 45

Fowler Flap

Answer 45

Flap moves aft and down when deployed

increases wing area first before increasing wing angle of attack (most efficient)

Question 46

Slotted Flap

Answer 46

As flap deploys and air slot is created between the trailing edge of the wing and the leading edge of the flap

Question 47

Leading Edge Flaps

Answer 47

Serve the same function as the trailing edge flaps and are deployed in addition to the trailing edge flaps

Question 48

Variable Camber Leading Edge

Answer 48

The entire edge is mounted and drops down to increase the camber of the airfoil

Question 49

Slots

Answer 49

Permanent fixtures located just aft of the leading edge of a flight surface.

Delays the air separation off the top of the wing.

Question 50

Slotted Leading Edge

Answer 50

Increases the angle of attack which may be maintained without stall

Question 51

Slats

Answer 51

A Section of the leading edge is mounted on tracks moving forward and down creates an air slot

These may be aerodynamically or mechanically controlled

Question 52

Slotted Flight Controls

Answer 52

Slots located ahead of primary flight control surfaces usually ailerons

Incorporated to increase roll control during slow flight

Question 53

Airfoil

Answer 53

Any structure designed to manipulate the flow of a fluid to produce a reaction, which in an aircraft’s case, is aerodynamic lift