Mis. Flashcards

1
Q

FUEL SYSTEM consists of

A

consists of two interchangeable crashworthy tanks, self sealing fuel lines, firewall mounted selector valves, prime boots pump and fuel tanks, engine drive pumps, quantity gauging and low level warning system

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2
Q

Fuel travel path

A
Pumps
Fuel Filter
HMU
Liquid to Liquid cooler
ODV
Nozzels
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3
Q

How much fuel is unusable

A

360 lbs gravity

359 pressure

356 closed circuit

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4
Q

fueling psi limits

A

gravity - none
pressure 300 gpm, 55 psi
closed circuit 110 gpm, 15 psi

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5
Q

when does fuel low come on

A

172 lbs of fuel

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6
Q

What does the LDI do

A

negative pressure

pump or lines

fuel boost can isolate leak or make it worse

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7
Q

MMU - collective to pitch

A

compensates for rotor downwash

collective increases provides fwd input

aft input if collective decreases

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8
Q

MMU - collective to roll

A

compensates for translating tendency

left lateral input when collective increases

right lateral input when collective decreases

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9
Q

MMU - collective to yaw

A

compensates for changes in torque effect

increases tail pitch as collective increases

decreases tail pitch as collective decreases

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10
Q

MMU - Yaw to Pitch

A

compensates for vertical thrust

aft input as tail rotor pitch increases

fwd input as tail rotor decreases

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11
Q

Collective / airspeed to yaw (electronic coupling)

A

Compensates for torque effect function of SAS/FPS computer

decreases tail pitch as airspeed increases - and opposite

tail rotor pitch change is proportional to airspeed

0-40 maximum mixing

40-100 mixing decreases

100+ no mixing

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12
Q

TORQUE COMPENSATION

A

MMU
Electronic Coupling
Cambered Fin

changes to nominal pitch setting in tail rotor from 7.5 to 10

wind, PA, temp not considered

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13
Q

CAMBERED FIN

A

helps streamline fuselage as airspeed increases

tapers off as airspeed increases

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14
Q

AFCS

A

SAS 1 & 2, TRIM, FPS, Stabilator

provides oscillation dampening (dynamic)
maintains desired attitude, speed, and handling (static)

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15
Q

SAS

A

enhances dynamic stability by providing short term rate damping in the pitch

SAS 1 - analog
SAS 2 - digital

Both have 5% control if one fails remaining sas will double its gain and the control authority of SAS is reduced by one half

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16
Q

TRIM

A

maintain position of cyclic and tail rotor.

requires boost to be on

17
Q

FPS - Flight Path Stabilization

A

FPS enhances static stability - long term rate damping

will not function without TRIM

Basic Auto Pilot Functions
<60 kts
Attitude hold - pitch, roll / hdg hold - yaw

> 60 kts
airspeed & attitude hold - pitch
attitude hold - roll
heading hold / turn coordination - yaw

18
Q

Stabilator manual slew

A

is possible with battery only

19
Q

Pneumatic system

A

bleed air furnished by the main engines, the APU, or an external pneumatic power source

drives the starter, heating system operation, external extended range tank fuel transfer

anti ice on - lose 18% torque

heater on lose 4%

20
Q

Powertrain system - input module

A

freewheeling unit allows engine disengagement during autorotation, accessory module will continue to be driven by main rotor

21
Q

Powertrain system - accessory module

A

electrical generator, and hydraulic pump

rotor speed sensor mounted on the right accessory module

22
Q

Powertrain system - main module

A

provides reduction in speed for the input module

23
Q

Intermediate gear box

A

mounted on tail pylon, can run 30 minutes at cruise with loss of all oil

24
Q

tail gear box

A

may run at cruise flight for 30 minutes with loss of all oil

25
Main Rotor system
fully articulated, main rotor blades, hub, flight controls, and bifilar vibration absorbers elastomeric bearing permits flap, lead, and lag damper supplied with pressurized hydraulic fluid BIM - nitrogen filled blades, red bad
26
tail rotor system
canted 20 degrees upward, provides 2.5 % of lift at hover
27
What if APU generator is sole source of ac power
backup pump and windshield anti ice cannot be used simultaneously
28
emergency power is provided by the
APU generator can also supply blade deice if one main generator fails if second fails blade deice load will drop
29
Primary source of power is DC or AC
Alternating Current
30
When only battery power is available the battery life is
38 minutes day, 24 minutes night for 80% battery