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Uh 60m > AFCS > Flashcards

AFCS Flashcards

1
Q

4 signals of the stabilator actuator inputs to the fcc’s

A

“CLAP” -think “nerves of the system”

  • Collective position transducers- (if collective goes up, stab goes down and vice versa).
  • Lateral accelerometers-
  • Airspeed x 2
  • Pitch rate gyros
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2
Q

stab full up, full down

A

6to10 full up, 34-42 full down

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3
Q

AFCS does what?

A
  • minimize workload

- enhances stability and handling qualities of the helicopter and provides autopilot workload.

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4
Q

Trim does what?

FPS does what?

A

holds aircraft in place

uses trim actuators to adjust

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5
Q

where is pitch trim?

A

gold actuator in the pilot assist area.

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6
Q

SAS 1 controls X%?
SAS 2 controls X%?
together X%?
most one SAS can have if either SAS fails? X%?

A

5
5
10
5

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7
Q

SAS acts ___ and then ___ resets it?

A

first

trim

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8
Q

Sensors are the ___/____ that feed the ____/FCC’s. Muscles are the ___.

A

nerves/inputs
Processers/FCC’s (CPTR 1/2)
trim

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9
Q

how many stabilator actuators?

A

2

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10
Q

how many trim actuators? what are they?

A

4

pitch, roll, yaw, collective

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11
Q

__ FCC is the only one that sends signals to the ____ actuators for flight

A

2

trim

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12
Q

_FCC receives AC power from the #_AFCS computer

A

1,1

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13
Q

what FCC operates off the battery?

also operates the #_ AFCS computer and #_ primary bus with the #_ AFCS circuit breaker

A

2

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14
Q

stabilator is?

A

variable angle of incidence

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15
Q

stabilator range is?

A

6to10 full up, 34to42 full down

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16
Q

inner loop

outer loop

A

SAS - short term (no movement to flight controls)

TRIM - long term (moves flight controls)

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17
Q

2FCC?

A

-sends signals to trim actuator for flight dynamic flight control inputs.

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18
Q

both FCC’s

A
  • provide self monitoring
  • fault isolation
  • failure alerts
  • advisory and caution indications.Sensor inputs to each FCC are compared via the Cross Channel Data Link (CCDL).
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19
Q

Outputs of stabilator

A

“SCALP”

  • Streamlines-downwash of main rotor during airspeeds <30kts.
  • Collective coupling (up of collective, down with stabilator and vise versa)
  • Angle of Incidence- decreases as A/S increases.
  • Lateral sideslip- left pedal-stab goes down; right pedal and stab goes up (like blinker) (has to do with induced flow to stabilator.
  • Pitch Rate- Pitch rate feedback. STABILATOR GOES OPPOSITE OF WHAT NOSE IS DOING (gyros control it)
20
Q

what speed range is stab down?

A

30-40kts

21
Q

SAS controls?

and is connected to?

A

pitch, yaw, roll

pilot assist

22
Q

Pitch trim is which actuator?

it is the only one that needs ___ ____

A

gold

hydraulic assistance

23
Q

inner loop?

A

sas

24
Q

below what speed will pedal turn adjust to a new heading?

A

50

25
Q

FPS operates above _kts?

recovery operates above _ kts?

A

50

60

26
Q

What are the main rotor subsystems

A

m/r blades, hub, flight controls, bifilar vibration absorber.

27
Q

Conical Elastomeric bearings permit what movements?

A

Flap, lead, lag

28
Q

Cylindrical Elastomeric bearings permit what movements?

A

Provides the pitch change axis

29
Q

Main module chip detector has a ____ time delay to allow fuzz burn to work?

A

30 seconds

30
Q

The _____ accessory module has a low oil pressure switch and chip detector.

A

Left

31
Q

Main XSMSM oil capacity?

A

7 gallons

32
Q

The main transmission is made up of ____ modules.

A

five (Two input modules, the main module, and two accessory modules)

33
Q

Each accessory module has a mounting flange for the installation and drive of the :

A

Main ac generator and Main hydraulic pump

34
Q

Where is the low oil pressure switch located

A

Left accessory module

35
Q

The main transmission may run at cruise flight for ____ with loss of oil?

A

30 Minutes

36
Q

The ac generators on the accessory modules also receive oil for what?

A

Cooling

37
Q

The oil temperature senor is also the chip detector located where?

A

Main module, intermediate module, tail rotor module.

38
Q

What range should oil pressure remain steady in to ensure any fluctuations occur they remain in the acceptable range?

A

45 to 60 psi

39
Q

What is used to cool the main transmission oil

A

oil cooler fan and radiator

40
Q

What caution appears if a chip detector fails the PBIT during power up

A

chip ibit fail

41
Q

The oil filter has _____ stages?

A

Two

42
Q

Does deactivation of the fuzz burn-off feature disable detection and cautions?

A

No

43
Q

The fuzz burn-off feature is deactivated when oil temperature reaches ___?

A

140 C

44
Q

Does the engine have fuzz burn capability?

A

No, only the tranny

45
Q

When inspecting the flexible couplings, check for ____, _____, and ______.

A

Buckling, Cracks, and Security.

Uh 60m (14 decks)

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