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PRELIM AAMT 1-10 > aircraft flight controls > Flashcards

aircraft flight controls Flashcards

1
Q

are aerodynamic devices that allow a pilot to adjust
and control the aircraft’s flight attitude.

A

Aircraft flight control surfaces

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2
Q

rotation about lateral axis

A

pitch ( elevator )

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3
Q

rotation about vertical axis

A

yaw ( rudder )

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3
Q

rotation about longitudinal axis

A

roll ( ailerons )

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4
Q

credited with developing the first practical control
surfaces

A

Wright brothers

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5
Q

modern control surfaces used what?

A

warping

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6
Q

he made hinged control surfaces, the same type of concept first patented some four decades earlier in the United Kingdom.

A

Glenn Curtiss

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7
Q

what is the technique used and patented by wright brothers?

A

consisted of a system of pulleys and cables to twist the trailing edges of the wings in opposite directions.

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8
Q

it has the advantage of not causing stresses that are a problem of wing warping and are easier to build into structures.

A

Hinged control surfaces

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9
Q

was an early system for lateral (roll) control of a fixed-wing aircraft.

A

Wing warping

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10
Q

it is an imaginary line about which a body rotates

A

axis

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11
Q

The simplest way to understand the axes is to think of them as long rods passing through the aircraft where each will intersect at the aircraft

A

center of gravity

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12
Q

axis that extends lengthwise ( nose through tail )

A

longitudinal axis “roll”

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13
Q

axis that extends crosswise ( wing tip through wing tip )

A

lateral axis “pitch”

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14
Q

what are the three airplane movements?

A

pitch, roll, and yaw

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15
Q

what are the three primary control surfaces?

A

aileron, elevator/stabilator, and rudder

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16
Q

what are the three axes of rotation?

A

longitudinal, lateral, and vertical

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17
Q

are means by which a pilot controls the direction and attitude of an aircraft in flight.

A

Aircraft flight controls

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18
Q

Flight control systems are subdivided into?

A

primary and secondary flight controls.

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19
Q

are required to safely control an aircraft during flight and consist of ailerons, elevators (or, in some installations,
stabilator) and rudder

A

primary flight controls

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20
Q

are intended to improve the
aircraft performance characteristics or to relieve excessive control loading

A

secondary flight controls

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21
Q

consist of high lift devices such as slats and flaps as well as flight spoilers and
trim systems.

A

secondary flight controls

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22
Q

carefully designed to provide adequate responsiveness to control inputs while allowing a natural feel.

A

Aircraft control systems

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23
Q

the controls usually feel soft and sluggish, and the aircraft responds slowly to control applications.

A

low airspeeds

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24
Q

It controls roll about the longitudinal axis

A

Ailerons

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25
Q

the controls become increasingly firm and aircraft response is more rapid.

A

higher airspeeds

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26
Q

connected by cables, bell cranks, pulleys, and/or push-pull tubes which are controlled by a control/cyclic stick.

A

Ailerons

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27
Q

It is attached to the outboard trailing edge of each wing and move in the opposite direction from each other.

A

Ailerons

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28
Q

Since the downward deflected aileron produces more lift as
evidenced by the wing raising, it also produces more drag.

A

Adverse Yaw

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29
Q

this added drag causes the wing to slow down slightly.

A

adverse yaw

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30
Q

a result of differential drag and the slight difference in the velocity of the left and right wings.

A

adverse yaw

31
Q

more pronounced at low airspeeds.

A

adverse yaw

32
Q

when pressure is applied to the control wheel, or control stick, the aileron that is being raised pivots on an offset hinge

A

fries-type ailerons

32
Q

one aileron is raised a greater distance than the other aileron and is lowered for a given movement of the control wheel or control stick.

A

differential ailerons

33
Q

This projects the leading edge of the aileron into the airflow and creates drag

A

fries-type ailerons

33
Q

It helps equalize the drag
created by the lowered aileron on the opposite wing and reduces adverse yaw.

A

fries-type ailerons

34
Q

what are the four common types of flaps

A

o Plain Flap
o Split Flap
o Slotted Flap
o Fowler Flap

35
Q

It is attached to the trailing edge of the wing, increase both lift and induced drag
for any given AOA.

A

flap

36
Q

It is the most common high-lift devices used on aircraft.

A

flap

37
Q

It is deflected from the lower surface of the airfoil and produces a slightly greater increase in lift than the plain flap.

A

split flap

37
Q

it is the most popular flap on aircraft today.

A

slotted flap

38
Q

It increases the lift coefficient significantly more than plain or split flaps.

A

slotted flap

39
Q

It contains a gap that vastly increases airflow across the entire flap, enhancing its effectiveness.

A

slotted flap

40
Q

this flap design not only changes the camber of the wing, it also increases the wing area.

A

fowler flaps

41
Q

instead of rotating down on a hinge, it slides backwards on tracks. In the first portion of its extension, it increases the drag very little, but increases the lift a great deal as it increases both the area and camber.

A

fowler flaps

42
Q
A
43
Q
A
44
Q

High-lift devices also can be applied to the leading edge of the airfoil. The most common types are?

A

o Fixed Slots
o Movable Slats
o Leading Edge Flaps
o Leading Edge Cuffs

45
Q

it directs airflow to the upper wing surface and delay airflow separation at higher angles of attack.

A

Fixed slots

46
Q

The slot does not increase the wing camber, but allows a higher maximum CL because the stall is delayed until the
wing reaches a greater AOA.

A

fixed slot

47
Q

Consists of leading edge segments that move on tracks. At low angles of attack, each slat is held flush against the wing’s leading edge by the
high pressure that forms at the wing’s leading edge

A

movable slats

48
Q

Are used to increase both CL-MAX and the camber of the
wings. This type of leading edge device is frequently used in conjunction with trailing edge flaps and can reduce the nose-down pitching movement produced
by the latter.

A

Leading Edge Flaps

49
Q

Are also used to increase both CL-MAX and the camber of the wings. Unlike leading edge flaps and trailing edge flaps, leading edge cuffs
are fixed aerodynamic devices.

A

Leading Edge Cuffs

50
Q

Are used to relieve the pilot of the need to maintain constant pressure on the flight controls, and usually consist of flight deck controls and small hinged devices attached to the trailing edge of one or more of the primary flight control surfaces.

A

trim system

50
Q

deployed from the wings to spoil the smooth airflow,
reducing lift and increasing drag.

A

Spoilers

51
Q

The most common installation on small aircraft is a single trim tab attached to the trailing edge of the elevator.

A

trim tabs

51
Q

Common types of trim systems include what?

A

trim tabs, balance tabs, antiservo tabs, ground adjustable tabs, and an adjustable stabilizer.

52
Q

Looks like trim tabs and are hinged in approximately the same places as trim tabs.

A

balance tabs

53
Q

MUST REMEMBER!!

A

The essential difference between the two is that the balancing tab is coupled to the
control surface rod so that when the primary control surface is moved in any
direction, the tab automatically moves in the opposite direction.

54
Q

it is a small portion of a flight control surface that deploys in such a way that it helps to move the entire flight control surface in the direction that the pilot wishes it to go.

A

SERVO TABS

55
Q

is a dynamic device that deploys to decrease the pilots work load and de-stabilize the aircraft.

A

SERVO TABS

56
Q

Are sometimes referred to as flight tabs and are used primarily on large aircraft.

A

SERVO TABS

57
Q

work in the same manner as balance tabs except, instead of moving in the opposite direction, they move in the same direction as the trailing
edge of the stabilator.

A

ANTISERVO TABS

58
Q

also functions as a trim device to relieve control pressure and maintain the stabilator in the desired position.

A

ANTISERVO TABS

59
Q

This tab is bent in one direction or the other while on the ground to apply a trim force to the rudder. The correct displacement is determined by trial and error.

A

ground adjustable tabs

60
Q

Rather than using a movable tab on the trailing edge of the elevator, some aircraft have an?

A

adjustable stabilizer

61
Q

what is used to control the movement of yaw

A
62
Q

what is the movement controlled by the elevator

A

pitch

63
Q

what is the type of stability controlled by the rudder?

A

directional

64
Q

what is the axes of rotation of the elevator

A

lateral

65
Q

what primary flight control is used to control the movement roll

A

aileron

66
Q

what is the axes of rotation of aileron

A

longitudinal

67
Q

what is the type of stability controlled by aileron

A

lateral

68
Q

where is rudder located

A

vertical stabilizer

69
Q

which primary flight control is located in vertical stabilizer

A

rudder

70
Q

what is the most popular flap on aircraft today

A

slotted flap

PRELIM AAMT 1-10 (2 decks)

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