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M11 Aircraft Systems > 11.9 > Flashcards

11.9 Flashcards

flight controls

1
Q

what effect does pulling the control column rearwards

A

elevators deflect upward, aircraft nose up

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2
Q

what does inner loop of auto pilot control

A

controls attitude of aircraft and is always active

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3
Q

signal used to dampen Dutch roll oscillations

A

yaw rate

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4
Q

what is used to disconnect auto throttle system

A

pushing throttle lever disconnect button

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5
Q

what is acars used for

A

manual and automatic data transfers between aircraft and ground in both directions

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6
Q

how is cable tension regulated

A

cable tension regulator

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7
Q

How is flutter and vibration elimated

A

Hydraulic damping or static balancing

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8
Q

When do spoilers assist flap system

A

As ground spoilers lift dump

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9
Q

Movement around lateral axis does what

A

Change angle of attack

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10
Q

Effect of speed brakes selected in a turn

A

Both sets of spoilers extend by a set amount

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11
Q

What prevents aerodynamic loads from pushing screwjack operated flaps back up

A

No back break used to

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12
Q

How is over run in a trimmanle horizontal stabaliser prevented

A

Switches and mechanical stops

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13
Q

What happens at control column of aileron trim is activated

A

Moves control colomn in same direction

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14
Q

What is turn co-ordination

A

Control surfaces act in conjunction with each other

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15
Q

What happens if only 1 side of flaps deploy

A

Flap extension automatically stops

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16
Q

How is airflow maintained at high angles of attack of the aerofoil

A

Using slotted slats

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17
Q

Result of left and right wing inboard ailerons both deflecting downwards together

A

Droop assist for the flaps

18
Q

Flaps and slats deployed what happens to air loads on aircraft

A

Increase lift and drag

19
Q

What flight controls activate a take off warning

A

Flaps , slats , speed brakes or trimmable horizontal stabiliser out of position

20
Q

Extending flaps and slats does what to a wing profile

A

Increase camber and wing surface area

21
Q

How does fly by wire control system develop a control input

A

Electrical signals transmitted to servo valves which regulate pressure at actuator

22
Q

Which way will surface move to give left co-ordinated turn

A

Left aileron and roll spoilers up , right down and rudder left

23
Q

In fly by wire system how is actuator hydraulic pressure regulated

A

Servo - valves

24
Q

What prevents excessive rudder limiter control movement at high speeds

A

Rudder limiter

25
Q

Purpose of trimmable horizontal stabiliser

A

Compensate for unbalance along longitudinal axis

26
Q

How are spoilers retracted if hydraulic pressure is lost, if deployed

A

Blown down by airflow

27
Q

What axis is roll around

A

Longitudinal

28
Q

What level of flight control is used to increase lift

A

Secondary

29
Q

Speed brakes double as what

A

Roll assist spoilers

30
Q

Rudder trim switch counters imbalances around what axis

A

Vertical

31
Q

What flap gives the most lift

A

Flower 95%

32
Q

What is manouver load control

A

Moves centre of lift inboard during maneovers using the wing surface

33
Q

What is gust load allevation

A

Reduces effect of gust loads on the aircraft by deflecting control surfaces

34
Q

How is gust load allevation used

A

With fly by wire

35
Q

When are power assisted controls used

A

High speeds and the pilot is connected

36
Q

What’s is artificial feel

A

Pilot feels resistance when using power operated flight controls

37
Q

What’s the purpose of servo operation

A

Converts electrical input into proportional hydraulic movement

38
Q

What’s fly by wire

A

Pilot inputs are transducer into electrical signal and sent to flight computer

39
Q

How is flutter prevented

A

Hydraulically powered control surface or static balancing

40
Q

What happens in stall warning

A

Nose down in put to elevator
Stick shake

41
Q

When are outboard ailerons locked out

A

High speed flight

M11 Aircraft Systems (23 decks)

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