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A&P General > Quiz > Flashcards

Quiz Flashcards

1
Q

Chord

A

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

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2
Q

Camber

A

The curvature of an airfoil

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3
Q

Relative wind

A

The oncoming airflow as seen by the airfoil

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4
Q

Angle of Attack

A

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

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5
Q

Angle of incidence

A

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

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6
Q

Bernoulli’s Principle

A

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

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7
Q

Forces Affecting Flight

A

Gravity (or weight)
Lift
Thrust
Drag

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8
Q

Lift (3)

A

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

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9
Q

Thrust (2)

A

Forward propulsive force provided by engines

The center of thrust is located below the center of drag

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10
Q

Drag

A

Resistance to forward motion caused by friction between air and aircraft

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11
Q

Types of Drag

A

Induced Drag
Parasite Drag

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12
Q

Induced Drag

A

Drag caused by the production of lift

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13
Q

Parasite Drag

A

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

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14
Q

Equilibrium

A

A condition where lift equals gravity and thrust equals drag

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

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15
Q

Longitudinal Axis

A

Runs from the nose to the tail

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16
Q

Lateral Axis

A

Runs from wing tip to wing tip

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17
Q

Vertical Axis

A

Runs from the belly to the top

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18
Q

Axis Intersection

A

At the center of gravity

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19
Q

Ailerons

A

Controls “roll,” motion around the longitudinal axis

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20
Q

Ailerons Location

A

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

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21
Q

Ailerons Operation

A

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

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22
Q

Control Stick Left

A

Left aileron up, right down

23
Q

Control Stick Right

A

Right aileron up, left down

24
Q

Ailerons Differential

A

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

25
Q

Elevators

A

Controls “pitch,” motion around the lateral axis

26
Q

Elevators Location

A

Located at the trailing edge of the horizontal stabilizer

27
Q

Elevators Operation

A

Forward or Reward motion of the wheel or stick

28
Q

Control Stick Forward

A

Elevator down, nose down

29
Q

Control Stick Rearward

A

Elevator up, nose up

30
Q

Elevators Function

A

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

31
Q

Rudder

A

Controls “yaw,” motion around the vertical axis

32
Q

Rudder Location

A

Located on the trailing edge of the vertical stabilizer

33
Q

Rudder Operation

A

Operated by the rudder pedals

Left Foot = left rudder

Cancels the unequal drag caused by aileron deflection

34
Q

Rudder Function

A

Streamlines fuselage

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

35
Q

Longitudinal Stability

A

Stability around the lateral axis

36
Q

How is Longitudinal Stability Achieved?

A

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

37
Q

Lateral Stability

A

Stability around the longitudinal axis

38
Q

How is Lateral stability achieved?

A

Lateral stability is maintained by wing dihedral

39
Q

Wing Dihedral

A

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

40
Q

Wing Dihedral Benefit

A

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

41
Q

Flaps

A

Deployed to increase the camber of the airfoil

42
Q

Flaps Benefits

A

Increases lift and drag

Reduces stall speed for reduced landing speed or takeoff roll

43
Q

Plain flaps

A

Hinged at the trailing edge of the wing

Will move down and into airflow (least efficient)

44
Q

Split Flap

A

Section of the lower wing surface hinged forward of trailing edge

45
Q

Fowler Flap

A

Flap moves aft and down when deployed

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

46
Q

Slotted Flap

A

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

47
Q

Leading Edge Flaps

A

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

48
Q

Variable Camber Leading Edge

A

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

49
Q

Slots

A

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

Delays the air separation off the top of the wing.

50
Q

Slotted Leading Edge

A

Increases the angle of attack which may be maintained without stall

51
Q

Slats

A

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

52
Q

Slotted Flight Controls

A

Slots located ahead of primary flight control surfaces usually ailerons

Incorporated to increase roll control during slow flight

53
Q

Airfoil

A

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

A&P General (18 decks)

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