Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

CH-47 academics exam 3 > Rotor > Flashcards

Rotor Flashcards

1
Q

Number of lube tanks on the rotor system?

A

7

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

How long is the blade cord and how much of it is spar?

A

Blade cord 32” firt 8” is spar

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Which component in the rotor system uses commands from the FCCs of the DAFCS to provide inputs to the rotor system?

A

LCT’s

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is the purpose of the Centrifugal Droop Stop Assembly?

A

Provide an additional limit to the drooping of the aft rotor blades during low rotor RPM

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What component of the Centrifugal Droop assembly pulls the balancing arm outward as the NR increases from GROUND to FLIGHT?

A

Weight

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What does a rotor blade drooping significantly lower than the other blades possibly indicate?

A

Could indicate a missing droop stop

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What flight condition must be avoided if lightning
cables and straps are damaged or missing from the
rotor blade?

A

If any lightening cables or straps are missing or broken, avoid flight in or near thunderstorms, especially in areas of observed or anticipated lightning discharges

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Which component controls the rate and limits the amount of lead and lag for the blade assemblies?

A

Blade shock absorbers

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Name the three types oil hubs on the rotor head and describe what they lubricate.

A

Central Oil Tank: Lubricates the six horizontal hinge pin bearings (ensure blade is at 90deg)
Three Pitch Varying Housing Tanks: Lubricate the pitch varying housing bearings on the shaft (blade level)
Three vertical hinge pin tanks (6 tanks): Lubricate vertical hinge pin bearings (check oil when level)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Which component is mounted inside the Pitch Shaft,
passes through the Horizontal Hinge Pin, and connects
to the outboard end of the Pitch Varying Housing?

A

Tie Bar (Allows for feathering)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is the maximum transient (power on) rotor RPM

(NR) with the engines driving the rotors?

A

106%

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Name the 6 major components of the rotor head and their purpose.

A

(1) Rotor hub: Provides the mounting base for the components of the rotor head.
(2) Horizontal hinge pin (HHP): attaches the Pitch Varying Shaft to the Rotor Hub and allows for flapping
(3) Tie bar: (a) Connects the pitch varying housing to the pitch varying shaft. (b) Allows the pitch varying housing to rotate around the pitch varying shaft, changing the pitch in the rotor blades. (Feathering)
(4) Pitch varying shaft: Provides the mount for the pitch varying housing.
(5) Pitch Varying Housing (PVH): Provides the mounting points for: (a) Pitch change links (b) Damper (c) Rotor blade (d) Lighting protection cables (bonding jumpers). The pitch varying housing is the final point of flight control input allowing pitch inputs
(6) Vertical hinge pin (VHP): The pin allows the blade to lead and lag.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Describe the rotor system limitations (NR) IAW TM 1-1520-271-10-1

A

he digital readout is green if NR is between 97% and 101%, yellow if NR is between 91% and 97% or between 101% and 106%, and red if NR is < 91% or > 106%. The digital readout and tape display appears green when in normal range, changes to yellow, then to red when maximum or minimum NR limit is exceeded.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Where is the rotor blade positioned when checking for the proper oil level of the VHP oil tank?

A

Blade is level (oil tank level)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

During preflight you discover that a rotor blade shock absorber appears to be low on hydraulic fluid. Where is that rotor blade positioned to check for proper
fluid level?

A

90 degrees from the fuselage

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What components provides rotor speed indications to CAAS?

A

Permanent Magnet Generator (PMG) within the main generators, signal then sent to ECU

17
Q

When rotor speed (NR) is displayed on the Vertical Situation Display (VSD) on the Multifunction Display (MFD) in the normal operating range, what does the display show?

A

Display is blank when NR is normal operating range

18
Q

What is the normal rotor RPM (NR) operating

range?

A

97-101%

19
Q

Name the four major components that make up the

swashplate assembly?

A

Rotating Ring
Spherical Ball (uniball)
Bearing (ball bearing)
Stationary Ring

20
Q

What components are designed into the rotor blade and provide a ground for the blade to the aircraft? If damaged, what flying restriction applies?

A

Lightning protection Cables and Straps (avoid flight into known or forecasted thunderstorms)

21
Q

Describe the purpose of the Fixed Droop Stops.

A

Prevent blades from Drooping (Always limit the amount of droop)

22
Q

What is the purpose of the Kevlar filament windings

on the rotor blade?

A

Kevlar filament windings secure the shock absorber bracket to the spar

Secure dampner bracket to the blade

23
Q

What component of the rotor head allows the blades to lead and lag?

A

Vertical Hinge Pin

24
Q

What condition may occur if ground control limitations are exceeded?

A

Droop stop pounding

25
Q

An entry in DA Form 2408-13-1 must be made if the rotor system exceeds what percentage?

A

111.5%

26
Q

rotor head that allows the blades to lead, lag, feather, and flap is what type of rotor head?

A

Fully articulated

27
Q

Name the following Components and their purpose

A

A. Limiters
Purpose: restrict the distance the weight and arm assembly can extend outward.

B. Springs
Purpose: pull the weight and arm assembly back into place as the rotor RPM decreases from FLIGHT to GROUND

C. Weight
Purpose: used to pull the arm outward as the rotor RPM increases

28
Q

Name the three actuators that are connected to the stationary ring of the swashplate.

A

Pivoting and swiveling or

2 upper dual boost actuators,

LCT

29
Q

What drives the rotating ring of the swashplate?

A

Drive arm (from drive collar assembly)

30
Q

What administrative action is required if the rotor

system accelerates above 111.5 % NR?

A

Write it up in the 2408-13-1

31
Q

What components ground the rotor blade to the rotor head?

A

Lightning protection cables and straps

32
Q

fully articulated heads means that each blade can _______, _________, _______ and ___________.

A

Lead, lag, feather and flap

33
Q

During preflight, the sight gauges on the rotor head are inspected for proper oil level. What oil level visual indication determines that the oil tank is full?

A

Half full on the sight gauge

CH-47 academics exam 3 (5 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions