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SYSTEMS > Drives & Rotors > Flashcards

Drives & Rotors Flashcards

0
Q

When the engines are not running, where does the drive system get power IOT drive components?

A

APU

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1
Q

What is the purpose of the Drive Chain System?

A

Change the angle of drive and converts the output RPM of the engines into usable power to drive the Main Rotor System, Tail Rotor System, and gear-driven components.

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2
Q

Under emergency conditions, the NGB, Main XMSN, IGBO, and TRGB will operate for a minimum of _______ without lubrication

A

30 minutes

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3
Q

The Nose Gear Box (NGB) of each engine _______ RPM and changes the output drive angle ___ degrees.

A

Reduces

90 degrees

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4
Q

The NGB oil system is a ______________ system, holding approx __ pints of oil.

A

Self-Contained

5 pints

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5
Q

The NGB oil filter has an impending bypass indicator (little red button) which will pop when the differential pressure is greater than ______ psid

A

23 +/- 2 psi differential

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6
Q

___________ is installed for emergency lubrication of the NGB bearings in the event the oil supply or oil pressure is lost.

A

Felt Wicking

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7
Q

The main transmission reduces the output speed from the NGB to ___ RPM at the main rotors and ______ at the tail rotor drive at 100% Np.

A

289 RPM main rotor (approx 300)

4815 RPM tail rotor (approx 5000)

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8
Q

There are _ complete oil systems installed in the main XMSN. The No _ side supplies oil to the AGB

A

2

No. 2 - AGB

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9
Q

The rotor brake is ___________ operated.

A

Hydraulically

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10
Q

If XMSN 1 or 2 exceed ______, the APU must be shut down and XMSN fluid allowed to cool for _____ prior to resuming APU ground operations; or fluid may be cooled by ________.

A

130*C
30 minutes
Operating an engine with rotor turning

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11
Q

The components that drive the electrical and hydraulic power are attached to and driven by __________.

A

The Accessory Gearbox (AGB)

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12
Q

Felt wicking provides the Main XMSN a minimum of _________ operation if the oil supply is lost.

A

30 minutes

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13
Q

The ________ reduces XMSN RPM from 4815 to 3636 RPM. The ____________ reduces it further to 1403 RPM before applying it to the Tail Rotor.

A

Intermediate Gearbox

Tail Rotor Gearbox

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14
Q

The intermediate gearbox uses __________ instead of oil for lubrication and is cooled by ___________.

A

Grease

Cooling Fan. Air is draw from the TRGB, routed down the vertical stabilator, and vented after passing over the IGB

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15
Q

The TRGB uses ______ for lubrication.

A

Grease

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16
Q

The APU driveshaft is Driveshaft No. _ and connects the APU to the Accessory Gearbox on the Main XMSN.

A

7

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17
Q

The main rotor driveshaft accepts ________ loads only.
The main transmission accepts ________ loads only.
The static mast accepts __________ loads only.

A

Main Rotor Driveshaft - Torsional Loads
Mains XMSN - Drive Loads
Static Mast - Flight Loads

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18
Q

The main rotor driveshaft is designed to ________ in the event of a gear train seizure. This will allow the aircrew to attempt an __________.

A

Shear

Autorotation

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19
Q

The __________________ is a non rotating shaft that provides an electrical connection between the aircraft and the FCR (UR).

A

Torque Tube and Reaction Bar

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20
Q

The ______________ is a non rotating mount for the MMA.

A

Derotation Unit (DU)

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21
Q

What oil level on the NGB sight gauge indicates proper servicing?
Main XMSN?

A

1/2 full

An average between the two of 1/2 full each

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22
Q

The accessory gearbox (AGB) receives lubricating oil from the _____________.

A

Main XMSN No. 2 pump

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23
Q

[CAUTION] - ACC OIL PSI LOW

What occurred?

A

Accessory Pump Oil PSI has been detected as low

28 +/- 5 psi while Nr > 10%

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24
Q

[CAUTION] - GEARBOX TEMP HIGH

What occurred?

A

IGB or TRGB temp has been detected as HOT by the thermal alarm unit

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25
Q

[CAUTION] - GEARBOX VIBRATION

What occurred?

A

IGB or TRGB has been detected with excessive vibration

26
Q

[CAUTION] - GEARBOX 1(2) CHIPS

What occurred?

A

Metallic chips detected in NGB 1(2)

27
Q

[CAUTION] - GEARBOX 1(2) OIL HOT

What occurred?

A

NGB 1(2) oil temp has been detected as HOT by the thermal sensing switch

28
Q

[CAUTION] - GRBX 1(2) OIL PSI LOW

What occurred?

A

NGB 1(2) oil PSI has been detected 65%

29
Q

[CAUTION] - ROTOR BRAKE ON/LK

What occurred?

A

The rotor brake is on or locked; at least one power lever is not off and Nr > 0%

30
Q

[CAUTION] - XMSN CHIPS

What occurred?

A

Metallic chips detected in the main XMSN

31
Q

[CAUTION] - XMSN 1(2) OIL HOT

What occurred?

A

Mail XMSN 1(2) oil temp has been detected as HOT by the thermal sensing switch

32
Q

[CAUTION] - XMSN 1(2) OIL PSI LOW

What occurred?

A

Main XMSN 1(2) oil psi has been detected as low

Psi < 28, Nr > 65% for 30 sec

33
Q

The rotor system consists of what two assemblies?

A

Main rotor assembly and tail rotor assembly

34
Q

The two rotor assemblies interface with what two systems IOT provide lift, thrust, directional flight control, and anti-torque control?

A

Drive system

Flight control system

35
Q

The rotor system consists of a 4-bladed, _____________ main rotor assembly and a 4-bladed tail rotor assembly with two ______________.

A

Fully articulated

Teetering rotor hubs

36
Q

The main rotor system is mounted on the ______________ and driven by the ___________.

A

Static mast

Main rotor driveshaft

37
Q

The diameter of the main rotor assembly is __ feet.

A

48 feet

38
Q

The main rotor hub assembly allows ______, ________, and __________ motion of the rotor blades and system. It holds the entire main rotor assembly to the ___________ and accepts driving torque transmitted to the _____ from the main XMSN by a driveshaft inside the ________.

A

Feathering, Flapping, and Lead-Lag motion
Static Mast
Hub - Static Mast

39
Q

What do the Strap Pack Assemblies do?

A

Permit flapping and feathering motion and transmit centrifugal loads from the main rotor blades to the hub.

40
Q

The strap pack assemblies consist of __ steel laminates.

A

22

41
Q

What assembly provides the means for controlling the main rotor pitch angle?

A

Pitch Housing Assemblies

42
Q

The ___________ at the inboard end of the Pitch Housing Assembly receives control inputs from a pitch change link attached to the rotating swashplate.

A

Pitch Arm

43
Q

What do the Lead-Lag Dampers do?

A

Control the lead-lag motion of the rotor blades and prevent mass imbalance (un-equal blade spacing)

44
Q

What is the purpose of the Lead-Lag Links?

A

Transmit blade lead-lag loads into the dampers, blade centrifugal force into the strap pack assembly, and control inputs from the pitch housing to the main rotor blade

45
Q

What component provides the pivot point for the main rotor blade flapping and feathering action and provides the mounting point for the pitch housing assembly?

A

Feathering Bearing Housing Assembly

46
Q

The ________________ restrict downward blade flap excursion. They are in constant contact with the striker plate when the rotor is not producing lift.

A

Droop Stop Followers

47
Q

What does the Droop Stop Ring do?

A

Restrict main rotor blade downward coning and downward blade flap excursion

48
Q

What transfers static electricity from the main rotor hub to the static mast?

A

Electrical Brush Assembly

49
Q

What secures the hub to the static mast?

What secures this component?

A

Hub Retention Nut

Lock Ring secures the Hub Retention Nut

50
Q

What transfers rotating motion from the main rotor drive shaft to drive the man rotor head assembly?

A

Main Rotor Drive Plate

51
Q

When an FCR / UR (mast mounted assembly) is not installed, the _______________ provides environmental protection.

A

Driver Plate Close Out Assembly

52
Q

The ____________ provides a stationary mounting point for the mast mounted assembly.

A

Derotation Unit (DU)

53
Q

The main rotor blades are ___ feet long and incorporate a negative ___ degree twist.

A
  1. -9 degree
54
Q

Is there a voice warning for low rotor RPM?

High rotor RPM?

A

Yes. Yes. 95% > Nr > 105%

55
Q

The main rotor assembly is mounted on what component?

A

Static Mast

56
Q

What component carries the centrifugal force load?

A

Strap Pack Assemblies

57
Q

What is used to attach the main rotor blade to the lead lag link?

A

Blade Attachment Pin

58
Q

The ______________ is a four bladed, semi-rigid, teetering, single head design.

A

Tail Rotor Assembly

59
Q

The ____________ provides attaching points for the tail rotor blades and the means to drive the blades.

A

Tail Rotor Head Assembly

60
Q

The _________ is mounted to the output shaft of the tail rotor gearbox and provides mounting points for the two tail rotor hubs

A

Fork Assembly

61
Q

What is the purpose of the elastomeric bearings?

A

Allow the hubs to teeter on the fork

62
Q

What assembly provides for attachment of the tail rotor blades to the hubs and transmit centrifugal force to the head assembly? This component also allows for feather motion by allowing the blade to twist

A

Strap Assemblies

SYSTEMS (5 decks)

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