Rotor

Question 1

Number of lube tanks on the rotor system?

Answer 1

7

Question 2

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

Answer 2

Blade cord 32” firt 8” is spar

Question 3

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

Answer 3

LCT’s

Question 4

What is the purpose of the Centrifugal Droop Stop Assembly?

Answer 4

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

Question 5

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

Answer 5

Weight

Question 6

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

Answer 6

Could indicate a missing droop stop

Question 7

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

Answer 7

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

Question 8

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

Answer 8

Blade shock absorbers

Question 9

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

Answer 9

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)

Question 10

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?

Answer 10

Tie Bar (Allows for feathering)

Question 11

What is the maximum transient (power on) rotor RPM

(NR) with the engines driving the rotors?

Answer 11

106%

Question 12

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

Answer 12

(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.

Question 13

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

Answer 13

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.

Question 14

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

Answer 14

Blade is level (oil tank level)

Question 15

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?

Answer 15

90 degrees from the fuselage

Question 16

What components provides rotor speed indications to CAAS?

Answer 16

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

Question 17

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?

Answer 17

Display is blank when NR is normal operating range

Question 18

What is the normal rotor RPM (NR) operating

range?

Answer 18

97-101%

Question 19

Name the four major components that make up the

swashplate assembly?

Answer 19

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

Question 20

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

Answer 20

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

Question 21

Describe the purpose of the Fixed Droop Stops.

Answer 21

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

Question 22

What is the purpose of the Kevlar filament windings

on the rotor blade?

Answer 22

Kevlar filament windings secure the shock absorber bracket to the spar

Secure dampner bracket to the blade

Question 23

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

Answer 23

Vertical Hinge Pin

Question 24

What condition may occur if ground control limitations are exceeded?

Answer 24

Droop stop pounding

Question 25

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

Answer 25

111.5%

Question 26

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

Answer 26

Fully articulated

Question 27

Name the following Components and their purpose

Answer 27

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

Question 28

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

Answer 28

Pivoting and swiveling or 2 upper dual boost actuators, LCT

Question 29

What drives the rotating ring of the swashplate?

Answer 29

Drive arm (from drive collar assembly)

Question 30

What administrative action is required if the rotor | system accelerates above 111.5 % NR?

Answer 30

Write it up in the 2408-13-1

Question 31

What components ground the rotor blade to the rotor head?

Answer 31

Lightning protection cables and straps

Question 32

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

Answer 32

Lead, lag, feather and flap

Question 33

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?

Answer 33

Half full on the sight gauge