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MH > Aircraft Systems > Flashcards

Aircraft Systems Flashcards

1
Q

T5

A

Free power turbine inlet temperature

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2
Q

Nr

A

Main rotor speed

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3
Q

Low rotor tone limits

A

98% +/- .5%

Steady tone at 91% +/-.5%

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4
Q

Tail gearbox or intermediate gearbox chip detector limits

A

Chip too big to burn off or 140°C +/-6°C

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5
Q

Usable fuel

A
  1. 4 lbs pressure

4234. 8 lbs gravity

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6
Q

Boost pumps fail

A

16.5 psi

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7
Q

Low-level fuel caution light

A

170-200 hover

210-280 3° nose down

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8
Q

Fuel dump rates

A

600 both
315 forward
365 aft

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9
Q

On engage droop stops go out at

And do what?

A

75% Nr

Prevent downward motion of main rotor blades

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10
Q

Sources of AC power

A

External
Inverter
Two generators

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11
Q

Sources of DC power

A

Battery

2 TRUs

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12
Q

One TRU fail, or both fail

A

One - monitored bus dropped

Both - monitored bus and primary bus dropped, essential run off battery

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13
Q

DC busses

A

Essential bus for DC flight instruments and all equipment necessary for safety of flight
Primary bus for all equipment essential for Mission completion
Monitored bus for equipment not required for safety of flight
Battery bus for the pilot domelight cockpit spotlights and CPI

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14
Q

Radio bus 1

Power from and to

A

Powered by the essential bus via the radio master one switch and supplies power to: ILS/VOR, VHF/AM, ICS, Secure voice, IFF, TACAN, UHF
(IVISITU)

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15
Q

Radio bus 2

Power from and to

A

Powered by the primary bus via the radio master 2 switch and provides power to: Doppler, OTPI, UHF antenna, HF, ASN-123, UHF/ADF, LF/ADF
(DO U HAUL)

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16
Q

What is the purpose of the tail rotor

A

To counteract the forces of the main rotor

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17
Q

Max speed

A

151 KIAS

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18
Q

Fuel consumption

A

1000 fwd

1200 hover

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19
Q

Basic weight and Max gross weight

A

14,500

20,500

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20
Q

Engine type

Components

A

2x GE T58-GE-8F axial flow gas turbine engines of the turboshaft type

Gas generator
free power turbine

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21
Q

Ng

A

Gas generator compressor speed which is dependent upon fuel flow and monitored by the fuel control unit

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22
Q

Anti-flap restrainers

A

Released at 25% Nr

Prevent upward motion of main rotor blades

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23
Q

Ibis

A

Pressure indicator at blade root combined with detector assembly gives visual and in-flight indication (master caution) of blade serviceability

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24
Q

Main gearbox

A

Couples both engines through single planetary gear assembly (which reduces engine RPM)to the rotor head

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25
Q

How many hydraulic systems and what are they

A

Three
Primary
auxiliary or ASE
utility

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26
Q

Accessory section

Driven by and supplies power to

A

Number one engine
Primary utility and AUX hydraulic pumps, HP torque meter oil pump, 2 AC generators, and two main gearbox lubricating oil pumps

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27
Q

MGB oil indications

Temp & presure

A

120°C

12 psi

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28
Q

Nf

A

Free power turbine speed, dependent upon speed selector level position and rotor load

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29
Q

Inverter, powered by, power to?

A

Powered by DC battery or external DC, to provide 115 volt VAC to pre-start instruments

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30
Q 
AC power distribution
#2 gen load
A 
Pilot VGI
Heater blower
No.2 fuel pump
Copilot windshield anti-ice
AC utility receptacle
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31
Q

No. 1 gen fail

A

No.2 drops load (except pilot VGI and sonar) and picks up No.1’s load

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32
Q

No.2 gen fail

A

Entire load dropped, No.1 picks up pilot VGI

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33
Q

Battery power

Purpose? Recharged by?

A

24 volt 22 amp
Limited ground ops and emergency power source in event of dual TR failure
Charged by TRs during normal ops

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34
Q

No 3 radio bus

A 
Powered from primary bus, no switch
VHF/FM
KY-75
RadAlt
Sonobouy Rxs
Sonar power 
Sonar guillotine
35
Q

ASE

A

Provides in flight stability
Some automatic flight control using various inputs
Fed into Flight controls using AUX servocylinders

Affects pitch, roll, yaw, and BarAlt

36
Q

Utility hydraulic system pressure

A

3000 psi

Rescue hoist 1250

37
Q

Utility hydraulic system powers

A 
Landing gear
Blade (1st) and pylon fold
Rotor brake
Windshield wiper
Rescue hoist
Haul down
Cable reeling machine
38
Q

Landing gear up powers what system

A

Armament system

39
Q

Weight on wheels for what

A

Landing gear locked in down position

40
Q

Landing gear emergency extension

A

3000psi air blow down
Gauge of pressure on broom closet
Emergency release handle: vents hydraulics and gear is lowered by gravity

41
Q 
Rescue hoist capacity 
Length
Psi
Power
Shear power
A 
600lbs
1250 psi utility hydraulics
100ft usable cable
First and last 10 ft red
Shear powered by DC essential bus
42
Q

Radar blind arc

A

20°fwd

10°aft

43
Q

Radar freq

A

9.375GHz

44
Q

Gain

A

Varies intensity of displayed video radar returns (clutter)

45
Q

STC

A

Sensitivity time control. Used to reduce sea clutter -decreases receiver gain for close targets

  • varies between 0 to 20 nautical miles
  • reduces effect of gain
46
Q

FTC

A

Fast time constant.

  • Allows only leading edge of contact to be displayed
  • reduces clutter with no effect on gain
47
Q

Radar power req’s

A

28VDC from primary bus
115 VAC from #1 gen
26VAC for heading reference

48
Q

GHARS fail radar limit

A

15° roll, 10° pitch

49
Q

Radar TX warning

A

10’ rotating

50’ not rotating

50
Q

Doppler feeds

A

ASE
GHARS
123
GVIs

51
Q

OTPI channels

A

1-16

17-31

52
Q

GHARS components

A
  • GRU
  • Flux valve
  • CRA-2-2A
  • EU
  • CRA-3
  • MHIC
  • Gyro controller
53
Q

-CRA-2-2A

A

-CRA-2-2A - compass repeater amplifier provides Mag hdgs from flux valve to RMI, CDI, BDHI

54
Q

-Flux valve

A

-Flux valve-Mag hdg ref, located in tail, 30° pitch/roll movement

55
Q

GRU

A

Gyro reference unit

Fully gimballed gyro free or slave mode

56
Q

EU

A

Electronic unit

located in electronics compartment in the nose interface of all GHARS systems and supplies power to the system

57
Q

CRA-3

A

Compass repeater amplifier
Floor between pilots
Amplifies true or grid headings from GRU to ASE, ASN 123, Doppler antenna, radar and BDH I S

58
Q

What’s the difference between slave and free modes

A

Slave-flex valve slaves GRU

Free-GRU as free directional Gyro
Variation is automatically updated to the Flux valve heading
Max change of 6°/hr

59
Q

GHARS outputs

A

TRUE (BRAD)

  • BDHIs
  • Radar
  • ASN 123
  • DOPPLER

MAG to BDHIs, RMIs, CDI

Pitch & roll to Pilots VGI & Radar
Hdg ref to ASE yaw channel

60
Q

How accurate is the trimpack GPS

A

100 m at least

61
Q

If high-level shut off’s are not serviceable when do you cease fueling

A

When either fuel gauge reaches 2000 lbs when fuelling JP-5 or at 1900 lbs when fuelling JP-4

62
Q

What are the NATO equivalents for JP4 and JP5

A

F 40 and F 44 respectively

63
Q

Accessory drive section drives what systems

A

Primary utility and auxiliary hydraulic pumps; the high-pressure torque meter oil pump; two AC generators; two MGB lubricating oil pumps; Nr tach generator; and tail Drive shaft take off

64
Q

Tail rotor pitch limit

A

10° either side

65
Q

Inverter

A

Three phase 400 Hz 115 V AC inverter located on the left-hand side of eBay
Energized by DC power from the DC essential bus
Converts it to AC power to the pre-start engine instruments during starting from DC external power or battery power
When one or both generators are operating the inverter is automatically shut off

66
Q

HF warnings

A

Do not transmit when: anyone is on or near the helicopter, the transmission access doors are open, the blades are folded, personnel are seated within 30 cm of the window, or personnel are seated within 60 cm of the HF coupler

67
Q

HF coupler limitation

A

2.0 -23.0 MHz

68
Q

Typical UHF comms panel set up

A

ON, OP, Plain

69
Q

ICS ALT modes
ALT 1
ALT 2

A

1- audio and Microphone signals pass through the isolation amplifier
2- audio and microphone signals pass through the microphone amplifier

70
Q

VHF/AM range

A

116.0-151.975

71
Q

VHF/FM range

A
  1. 0-173.9975

* 2.5Khz increments

72
Q

How many channels does the VHF/FM Sabre radio provide and what are its main uses

A

12 preselected channels

Mainly used to provide hoisting and back up LSO communications as required as well as SAR Ops

73
Q

Emergency frequencies

A

121.5 Mhz VHF/AM
Ch 16 VHF/FM
243Mhz UHF
406 MHz UHF

74
Q

What radar control panel settings affect ASP

A

Gain, STC, tilt

75
Q

What must happen prior to the radar being switched to standby

A

Number one and two engines running

76
Q

When should the radar be switched to standby

A

Post landing, hot fuelling, HIFR check, prior to hoisting or slinging

77
Q

Is the ASP certified for navigation

A

No

78
Q

ASP inflight inputs

A 
GPS px info
TH from GHARS via radar
Radar
AIS
Camera

G TRAC

79
Q

ASP power

CBs?

A

28VDC direct from primary bus

3CBs

80
Q

ASP post flight outputs

A 
GTI RAG
Gold (OTH plot)
TH data
Images from camera
Radar raw data
AIS data
GPS data
81
Q

Doppler outputs

A 
GAG A Ho
Ground velocity indicator (GVI)
ASN 123
GHARS
ASE
Hover indicator
82
Q

Which systems use direction finding

A

VHF AM and FM, UHF, OTPI

83
Q

What is the hall down sheer limit

A

6000 PSI + or -500

MH (9 decks)

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