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DAFCS Flashcards

1
Q

What DAFCS functions are provided under the core features?

A
  • Damping of angular rates
  • Control response augmentation
  • Bank Angle Hold
  • Heading Hold
  • Directional Static Stability
  • Automatic Turn Coordination above 40 KCAS
  • Limited Automatic Turn Coordination below 40 KCAS
  • Roll Axis Attitude Command/Attitude Hold (ACAH) response below 40 KCAS
  • Longitudinal Static Stability
  • Airspeed Stability above 40 KCAS
  • Pitch Attitude Stability below 40 KCAS
  • LCT scheduling (WHEN IN AUTO)

Core features enhance stability and control of the aircraft

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2
Q

What DAFCS functions are provided under the native (pilot selectable) features?

A
  • DECEL to hover
  • Position Hold (PSN)
  • Inertial Altitude Hold (ALT-INRT)
  • Radar Altitude Hold (ALT-RAD)
  • Descent
  • Roll Wings Level Mode (LEVEL or RWL)
  • Velocity Hold

Native features allow pilots to manually select control modes

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3
Q

Where are Native features selected by the pilot?

A

The TCL

TCL stands for Thrust Control Lever

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4
Q

When do the Core features become active?

A

When DAFCS selector switch is placed in 1, 2 or both positions

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5
Q

What programs the LCTs based on airspeed and WOW condition when in AUTO?

A

LCTs are programmed by the DAFCS

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6
Q

When the LCT switch is in MANUAL, how are the LCTs controlled?

A

Manually by the pilot

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7
Q

Which components are controlled by DAFCS to make inputs into the pitch, roll, yaw and thrust axes?

A
  • Extensible link portion
  • Differential Airspeed Hold Actuator (DASH)
  • Thrust Cockpit Control Driver Actuator (CCDA)
  • Pitch Cockpit Control Driver Actuator (CCDA)
  • Longitudinal Cyclic Trim Actuators (LCTs)
  • Control Position Transducers (CPTs)

These components work together to manage flight control inputs

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8
Q

What are the different DAFCS regimes?

A
  • Ground
  • Low Speed
  • FWD Flight
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9
Q

When accelerating from a hover, what is the max airspeed that can be flown to remain within the Low-Speed Regime?

A

45 KCAS

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10
Q

What is Rate Damping?

A

The Resistance to a rate motion not caused by the pilot in the pitch, roll and yaw axes

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11
Q

What is Control Response Augmentation/ Quickening?

A

Amplification of the pitch, roll and yaw control inputs

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12
Q

What does the acronym CPT stand for?

A

Control Position Transducers

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13
Q

What does the acronym LVDT stand for?

A

Linear Variable Differential Transducer

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14
Q

What information does each LVDT inside the CPTs send to each FCC?

A

Position and rate of motion (if in motion) to each FCC

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15
Q

If the aircraft moves without CPT movement, the FCCs know the movement was caused by what?

A

Outside force (wind, turbulence etc.)

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16
Q

What information do the EGIs provide to the FCCs?

A

Pitch, roll and yaw information

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17
Q

What should you do if the LCT actuators fail to position to GND during taxi or slope operations?

A

Select manual Adjust manually

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18
Q

Will the Longitudinal Cyclic Trim Actuators (LCT’s) function with the DAFCS switch in the off position?

A

Yes

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19
Q

Do not manually extend the LCT actuators beyond the GND position on the cyclic trim indicators at airspeeds below ______ KCAS.

A

60 KCAS

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20
Q

When does the Ground Regime become active?

A

When the L and R GND CONT light is active

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21
Q

Which CPT input is cancelled when both WOW switches are engaged?

A

Pitch CPT

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22
Q

When the landing gear proximity switches/WOW switches are activated, the DAFCS input into the pitch ILCA is reduced by what percent?

A

50%

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23
Q

How does this reduction help the pilot control the aircraft?

A

Reduces porpoising while 2-wheel taxiing

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24
Q

When does Low-Speed Turn coordination become active?

A

When accelerating above 45 KCAS

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25
Q

What is the maximum back angle for Low-Speed Turn Coordination?

A

45 Degrees

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26
Q

When does Turn Coordination become active?

A

Above 40 Knots

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27
Q

VEL can be armed at any speed but will activate only below ___ knots forward groundspeed.

A

35 knots

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28
Q

It will remain active up to ___ knots forward groundspeed.

A

45 knots

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29
Q

Below ____ knots total groundspeed, the aircraft will automatically be slowed to a zero-velocity hover.

A

3 knots

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30
Q

Deceleration/Position Hold (DECEL/PSN) can be armed at any speed but will activate only below ___ knots forward GS.

A

65 knots

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31
Q

It will remain active at up to ___ knots GS.

A

70 knots

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32
Q

At what groundspeed does the PSN feature become captured?

A

Less than 1 knot

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33
Q

In DECEL, the AFCS TRIM switch biases the speed by ___ knot/sec in the direction of actuation.

A

1 knot/sec

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34
Q

In PSN, discrete presses of the AFCS TRIM switch provide a position change of ___ foot per click in the direction of actuation.

35
Q

In PSN, Holding the AFCS trim switch produces a fixed translational rate of ___ feet per second in the direction of actuation.

A

5 feet per second

36
Q

What features are active when in the Forward Flight Regime?

A
  • DASH
  • Bank Angle Hold
  • Heading Hold
37
Q

What pilot-selectable modes are available on the Thrust Control Lever?

A
  • PSN / DECEL
  • ALT INRT / ALT-RAD / ALT+R / DESCENT
  • VEL / LEVEL
  • OFF
38
Q

When can Altitude Hold be selected?

A

When TCL DAFCS SEL SWITCH is engaged

39
Q

What is the name of the DAFCS component which the #1 Flight Control Computer (FCC 1) controls to provide the Altitude Hold feature?

A

Not specified

40
Q

Which DAFCS Computer controls the radar and inertial altitude hold feature?

A

Not specified

41
Q

If the Thrust CCDA magnetic brake fails to release, how does the pilot move the Thrust Lever?

A

By slipping it

42
Q

How do you momentarily disengage altitude hold when changing altitude?

A

By pressing thrust trigger

43
Q

When selecting ALT on the DAFCS Mode Select Switch, what altitude source is selected first?

44
Q

What are the three ALT Hold modes available when toggling through the ALT Hold Switch?

A
  • ALT INRT
  • ALT-RAD
  • ALT+R
45
Q

What mode of ALT Hold will the pilot be in when selecting ALT twice on the DAFCS Mode Select Switch?

A

Not specified

46
Q

Define what the term ARMED means, and how is it displayed?

A

Means a feature is turned on and ready to operate when parameters required are met. Displayed in white

47
Q

Define what the term CAPTURED means, and how is it displayed?

A

Means the feature is ARMED and now within parameters required. Displayed in green

48
Q

Define what the term CYCLIC DETENT?

A

Means Cyclic is not in motion

49
Q

Is it necessary for the cyclic to be mechanically centered for the cyclic to be in detent?

50
Q

What supporting systems are required for DAFCS to operate?

A
  • # 1 or #2 AC or DC
  • # 1 #2 FLT HYD CONTR HYD / DAFCS
  • Two EGI’s #1 #2 DAFCS
51
Q

Where are the pilot-selectable switches that control DAFCS?

A
  • OFF
  • 1
  • 2
  • BOTH
52
Q

What are the different controls on the AFCS Panel?

A
  • Flight Director
  • Cyclic Trim
  • System Select
53
Q

How will the aircraft react if DAFCS is turned off at one airspeed and back on at a different airspeed?

A

Nose up or Down

54
Q

What are the different controls on the Cyclic Stick?

A
  • AFCS Trim Switch
  • Centering Device Release Switch (CD REL)
  • FD CPLR REL
55
Q

Should you allow the cyclic to move when the DAFCS trim switch is moved forward or aft?

56
Q

Describe one way you can change the aircraft bank angle without moving the cyclic?

A

Trim Switch

57
Q

What DAFCS Core functions are provided by the four-way AFCS Trim Switch?

A

Not specified

58
Q

What does pressing the CD Rel switch do?

A

Release mag brakes in pitch, roll and yaw axes

59
Q

What are the different controls on the Thrust Control Lever?

A
  • Hover Altitude Beep Switch
  • DAFCS Hover mode select Switch
  • Thrust Brake Trigger Switch
60
Q

What is the basic function of the Thrust Altitude Beep switch?

A

To adjust altitude when any Alt Hold features are active

61
Q

Altitude hold will level-off and capture a new reference when the vertical velocity is less than ___ feet/min.

62
Q

At what Pitch or Roll attitude will DAFCS altitude hold change to ARMED?

A

Not specified

63
Q

When utilizing the Hover Altitude UP/ DOWN Switch, altitude is changed at what rates?

A

Not specified

64
Q

With Velocity (VEL) captured (aircraft hovering), what happens to the status of VEL when either weight-on-wheel switch engages?

A

Not specified

65
Q

When can VEL mode be ARMED?

A

Not specified

66
Q

When does VEL mode become LEVEL mode?

A

Above 45 KGS

67
Q

When does PSN become captured/ ACTIVE?

A

With groundspeed less than 1 knot

68
Q

How does the pilot select DECEL?

A

By selecting PSN on TCL

69
Q

When does DECEL become ACTIVE?

A

Below 65 knots

70
Q

How does the pilot arm DESCENT mode?

A

3rd click of ALT Switch

71
Q

When does DESCENT mode become ACTIVE?

A

Less than 65 KGS

72
Q

Once the aircraft reaches 1 KGS or less and approx. 20 ft AGL, it will terminate the DESCENT mode; what modes will the aircraft be in?

A

Not specified

73
Q

If the pilot enters into the DESCENT mode at altitudes greater than 200 ft AGL, will the aircraft terminate at approx. 20 ft AGL?

A

Not specified

74
Q

What are the DESCENT mode glide path limitations?

A

Not specified

75
Q

How can the pilot adjust the DESCENT mode glide path angle?

A

Not specified

76
Q

What is the purpose of SHIP mode?

A

Not specified

77
Q

What does SHIP mode disable?

A

Not specified

78
Q

What sensors provide information to the FCCs?

A

Not specified

79
Q

If you have a hard-over with both DAFCS on, how will you know when you have the operational system selected on and the malfunctioning system off?

A

Not specified

80
Q

What visual indication will you see when the DASH actuators are re-centering when DAFCS is first turned on?

A

Not specified

81
Q

The RETRIM REQUEST Advisory is active when either the roll or yaw ILCA is using more than 40% or 50% of its available authority for trim. The pilot should re-trim the controls with the ____ switch to allow the actuators to re-center?

82
Q

Which mode of LCT operation should you select during flight in moderate or above turbulence?

83
Q

When flying in moderate turbulence or above, should BARO ALT be engaged?

84
Q

Will the cyclic move when the DAFCS trim switch is moved laterally?

Ch47 (8 decks)

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