Rotary Review
What are the gear systems inside the transmission of the Hughes 500 Transmission?
One stage of spiral bevel gears and one stage of Planetary gears
One stage of spiral bevel gears and two stages of planetary gears
Two stages of planetary gears
Two stages of spiral bevel gears
Which gear directly drives the output shaft for the tail rotor in the Hughes 500 Transmission?
The first stage input pinion gear
Engine Gearbox output
The second stage pinion gear
The second stage bevel ring gear
What is the purpose of the tail rotor system?
To counteract torque forces created by the engine driving the main rotor
To counteract thrust forces created by the engine driving the main rotor
To counteract lift forces created by the engine driving the main rotor
To control the teetering forces created by the engine driving the main rotor
Which of the following is NOT one of the standard requirements of the system driving the tail rotor?
Transmit rotational from the transmission to the tail rotor
Allow for flexibility at very high rotational speeds due to loads and forces acting on the tail boom
Change the directional plane of rotation to meet the requirements for location and orientation of the tail rotor.
Allow the system to rotate independently form the main rotor transmission during in flight emergency or “hot loading” of the helicopter
Which type of couplings does the Bell 47 use on the forward tail rotor drive shaft?
Rigid couplings
Flexible constant velocity joint coupling
Flexible curvic splined couplings
Flexible universal joint couplings
What does the Bell 47 pitch change drum and screw assembly, attached to the tail rotor gearbox, move to create T/R blade angle changes?
A threaded sleeve and Tee head attached to the blades through adjustable pitch link
A threaded nut and Dee tube attached to the blades through adjustable pitch links
A bellcrank assembly and pitch links attached to a sliding sleeve assembly
A bellcrank assembly and sliding rod assembly attached to a Tee head and pitch links
What is the forward short shaft on the T/R system made of and how are the flanges attached?
Aluminum alloy shaft has the flanges bonded to the ends of the shaft
Stainless steel shaft has the flanges bonded to the ends of the shaft
Stainless steel shaft has the flanges bonded and solid riveted to the ends of the shaft
Aluminum alloy shaft has the flanges bonded and solid riveted to the ends of the shaft
How does the Bell 206 transmission drive shaft assembly provide flexibility of the shaft as the tail boom deflects?
A universal joint coupling attached to the each end of the shaft
A splined end on the shaft where it attaches to both ends
A Curvic coupling assembly where each shaft segment attaches to each other
A Thomas coupling where shaft segments attach to each other
How do you know if the bonding at one of the coupling flanges or splined plugs has failed?
The knurled headed shear pin will not be able to spin freely inside the fitting and shaft.
The tail rotor will turn independently free of the drive shaft
The tail rotor drive shaft will lock up and not be able to turn the tail rotor
The solid rivets will not spin freely inside the coupling flanges or splined plugs
What is the type of gearing inside the Bell 206 T/R gearbox and what does it do?
Single stage planetary gears used to reduce the rpm and change the plane of rotation 90 degrees
Single stage helical bevel gears used to increase the rpm and change the plane of rotation 180 degrees
Single stage helical bevel gears used to reduce the rpm and change the plane of rotation 90 degrees
Single stage helical bevel gears used to increase the rpm and change the plane of rotation 90 degrees
How does the Bell 212 transmission drive shaft assembly provide flexibility of the shaft as the tail boom deflects?
A universal joint coupling attached to the each end of the shaft
A splined end on the shaft where it attaches to both ends
A Thomas coupling where shaft segments attach to each other
A Curvic coupling assembly where each shaft segment attaches to each other
What is the purpose of the gearbox located at the base or bottom of the tail fin?
Change the plane of rotation 90 degrees and decrease the speed of rotation
Change the plane of rotation 42 degrees and maintain the same speed of rotation
Change the plane of rotation 42 degrees and decrease the speed of rotation
Change the plane of rotation 90 degrees and maintain the same speed of rotation
How does the Hughes 500 transmission drive shaft assembly limit flexibility of the shaft?
A universal joint coupling attached to the each end of the shaft
A drive shaft damper assembly attached mid-way along the span of the shaft
A Thomas coupling where shaft segments attach to each other
A Curvic coupling assembly where each shaft segment attaches to each other
What is the type of gearing inside the Hughes T/R gearbox and what does it do?
Single stage planetary gears used to reduce the rpm and change the plane of rotation 90 degrees
Single stage helical bevel gears used to increase the rpm and change the plane of rotation 180 degrees
Single stage helical bevel gears used to reduce the rpm and change the plane of rotation 90 degrees
Single stage helical bevel gears used to increase the rpm and change the plane of rotation 90 degrees
How is dissymmetry of lift dealt with on the rigid main rotor head?
Flapping hinge
Teetering hinge
Underslung head design
Blade flexing
What is the meaning of the term "Dry Head" on the Bell 206 MRH?
The MRH is lubricated by oil using self-contain oil reservoirs
The MRH is not lubricated, as there are no moving parts
The MRH is Teflon lined and requires no lubrication
The MRH is lubricated by grease using various grease fittings
During the forward movement of a helicopter, which of the following conditions exist?
Lift and thrust are both vertical and they are greater than weight and drag
Lift and thrust are both vertical and they are equal to weight and drag
Lift is straight up, thrust is forward and weight and drag are downward
Lift is straight up, thrust is forward, weight is downward and drag is aft
How is pitch change accomplished on a Semi-rigid main rotor head?
Blade grips and pitch horn
Flapping hinge and pitch horn
Blade flexing
Teetering hinge and pitch horn
What is item number 7?
Frequency adapter
Blade bolt
Self-lubricating oscillating bearing
Balance washers
What is the purpose of the rotor brake system?
To hold the rotor from tuning during start-up
Prevent the rotor from turning during high winds while helicopter parked
Stop the helicopter from moving forward while on the ground
To stop the rotation of the rotor with engine running to disembark passengers
How is the lead/lag action accomplished on the AS350/355 MRH?
Vertical mounted hinge pins or bolts
Lead/lag link assembly
Flexing of the upper and lower sleeves at the spherical thrust bearing and the frequency adapter
Flexing of the spindle assembly inside the elastomeric retention and thrust bearings
How is the flapping action accomplished on the Hughes 500 MRH?
Horizontally mounted hinge pins or bolts
Flexing of a strap pack assembly
Flexing of the star arm assembly
Flexing of the spindle assembly inside the elastomeric retention and thrust bearings
As the blade of a fully articulated main rotor head flaps up, what does this blade want to do?
Speed up
Change pitch angle
Slow down
Nothing
In which of the following flight conditions is lift symmetrical over the entire rotor disc?
Vertical Climb
Forward flight
No-wind hover
No-wind forward flight
What is the resultant of the combination of increasing the blade pitch and lift and the centrifugal force acting on the main rotor blades?
Blade flapping
Blade hunting
Blade feathering
Blade coning
As the blade of a semi-rigid underslung main rotor head teeters up, what does this blade want to do?
Speed up
Slow down
Change pitch angle
Nothing
What will occur if one blade is not flying through the same tip path plane as the other blades?
The helicopter will yaw to the right
The helicopter will pitch to the left
Nothing this is a normal situation
The helicopter will vibrate
Why can a rotor brake system only be used below a certain rpm?
Brake system will not work due to the engine torque
Can cause the engine to overheat
Pads will not generate enough friction to slow down above this speed
Pads will overheat at higher speeds due to transforming kinetic energy into heat
What causes dissymmetry of lift in a helicopter rotor system during forward flight?
Increase in airspeed over the retreating blade
Both blades are turning at the same speed therefore; lift is always symmetrical in any flight condition
Decrease in airspeed over the advancing blade
Increase in airspeed over the advancing blade
How is the flapping action accomplished on the AS350/355 MRH?
Flexing of the spindle assembly inside the elastomeric retention and thrust bearings
Horizontally mounted hinge pins or bolts
Flexing of the star arm assembly
Flexing of a strap pack assembly
What is the purpose of the pendulum weights installed on the rigid rotor head system blades?
To act as flap restraint devices at the blade roots
To maintain inertial of the blades for autorotation
To eliminate the harmonic vibrations created by the blades
To eliminate the out of track vibrations
If the main rotor blade tips all follow the same tip path plane, this is referred to as which of the following conditions?
Out of track
In phase
Out of balance
In track
In helicopter theory of flight, as lift is produced it is always perpendicular to which of the following?
Drag
Weight
Relative wind
Thrust
What force causes the rotor blades to straighten out as they begin to rotate?
Circumferential force
Centripetal force
Centrifugal force
Coriolis force
What is item number 5?
Balance washers
Self-lubricating oscillating bearing
Blade bolt
Frequency adapter
What is item # 113 as identified by the box around the number in the picture?
Lead/lag hinge assembly
Hub assembly
Sleeve-spindle assembly
Flapping hinge pin
What is the definition of the term Chord?
The distance from the blade root to the blade tip along the centerline of the blade
The distance from the leading edge to the trailing edge
The angle between the chord line and the reference plane determined by the rotor hub
The acute angle between the relative wind and the chord line of the blade
What is the fundamental principle of the stabilizer bar installed on the Bell 47?
Gyroscopic rigidity in space
Gyroscopic precession
Gyroscopic precession
Gyroscopic angular momentum
What is the purpose of the latch bolt assembly on the Bell 206 MRH?
Holds the blade in the head
It secures the grip to the tension torsion strap assembly
It allows for blade flapping
It is the lead/lag hinge
What type of rotor head is the Sikorsky S-58 MRH?
Semi-rigid main rotor head
Semi-articulated main rotor head
Fully articulated main rotor head
Rigid main rotor head
What is item # 14 on the Bell 47 MRH?
Grip
Drag Brace
Gimbal Ring
Counterweight Assembly
What is the maximum amount of twist allowed for the tension torsion strap Bell 206 on the Main Rotor Head?
10 degrees
45 degrees
90 degrees
180 degrees
What is item # 1 on the Bell 47 MRH?
Counterweight Assembly
Gimbal Ring
Drag Brace
Grip
What is the meaning of the term "Wet Head" on the Bell 206 MRH?
The MRH is lubricated by hydraulic fluid using the airframe hydraulic system
The MRH is lubricated by oil using the main rotor gearbox oil system
The MRH is lubricated by oil using self-contain oil reservoirs
The MRH is lubricated by grease using various grease fittings
If one of the main rotor blade tips is not follow the same tip path plane as the others, this is referred to as which of the following conditions?
Out of balance
In track
Out of track
In phase
When a rotor system is at rest, what will occur due to the weight of the blade over their span?
Blade coning
Blade droop
Blade hunting
Blade Flapping
How is dissymmetry of lift dealt with on the fully articulated main rotor head?
Flapping hinge
Teetering hinge
Underslung head design
Blade flexing
What is the purpose of the latch assemblies on the Bell 206 MRH?
It is the lead/lag hinge
Allows blade sweeping for balance
Holds the blade in the head
Secures the grip to the yoke assembly
What is item # 12 as identified by the box around the number in the picture?
Lead/lag hinge assembly
Damper assembly
Sleeve-spindle assembly
Flapping hinge pin
What is item # 75 as identified by the box around the number in the picture?
Lead/lag hinge assembly
Flapping hinge pin
Hub assembly
Sleeve-spindle assembly
For the fully articulated main rotor head, for which force is the lead lag hinge designed to compensate?
Dissymmetry of lift
Colander effect
Coriolis effect
Coronation effect
What is item # 2 on the Bell 47 MRH?
Drag Brace
Grip
Gimbal Ring
Counterweight Assembly
How is the flapping action accomplished on the Sikorsky S-76 MRH?
Horizontally mounted hinge pins or bolts
Flexing of a strap pack assembly
Flexing of the star arm assembly
Flexing of the spindle assembly inside the elastomeric retention and thrust bearings
What is item number 4?
Balance washers
Frequency adapter
Self-lubricating oscillating bearing
Blade bolt
What is the definition of the term Angle of Attack?
The distance rom the blade root to the blade tip along the centerline of the blade
The distance from the leading edge to the trailing edge
The angle between the chord line and the reference plane determined by the rotor hub
The acute angle between the relative wind and the chord line of the blade
Which of the following items is not included on the five bladed Hughes 500nMRH assemblies?
Pitch housing
Lead/lag link
Damper assembly
Two-part pendulum assembly
What is the definition of the term Pitch Angle?
The distance rom the blade root to the blade tip along the centerline of the blade
The distance from the leading edge to the trailing edge
The angle between the chord line and the reference plane determined by the rotor hub
The acute angle between the relative wind and the chord line of the blade
What is the purpose of the drag brace on the Bell 47 MRH?
Holds the blade in the head
Used as a collapsible strut for blade retraction
To allow blade sweeping for balance
It is the lead/lag hinge
How is the lead/lag action accomplished on the Sikorsky S-76 MRH?
Lead/lag link assembly
Flexing of the upper and lower sleeves at the spherical thrust bearing and the frequency adapter
Flexing of the spindle assembly inside the elastomeric retention and thrust bearings
Vertical mounted hinge pins or bolts
What is item number 9?
Spherical thrust bearing
Star assembly
Sleeve flange assembly
Droop restraint
What impact does increased weight of the helicopter have on the blade coning angle?
Nothing
Negative coning angle
Decrease in coning angle
Increase in coning angle
What is item # 15 as identified by the box around the number in the picture?
Hub assembly
Sleeve-spindle assembly
Flapping hinge pin
Lead/lag hinge assembly
What type of main rotor head is installed on the Bell 47 Helicopter?
Rigid main rotor head
Semi-rigid main rotor head
Semi-articulated main rotor head
Fully articulated main rotor head
How does the rigid main rotor head deal with the Coriolis Effect?
Lead/Lag or hunting hinge
Teetering hinge
Underslung head design
Blade flexing
Why are the blade bolts hollow?
Why are the blade bolts hollow?
To allow a place to add weight for balancing
Increase structural strength
All of the above
What is item # 40 on the Bell 47 MRH?
Yoke
Pillow Block
Gimbal Ring
Trunnion
What type of main rotor head is installed on the Bell 206 Helicopter?
Rigid main rotor head
Semi-rigid main rotor head
Semi-articulated main rotor head
Fully articulated main rotor head
What is item number 3?
Droop restraint
Star assembly
Spherical thrust bearing
Sleeve flange assembly
What is the purpose of the rotor brake system?
To hold the rotor from tuning during start-up
To stop the rotation of the rotor with engine running to disembark passengers
Stop the helicopter from moving forward while on the ground
To slow the rotor down quickly during shutdown
Which of the following will produce induced drag?
Generation of lift
Weight
Airflow over the fuselage
The extended landing gear
How is pitch change accomplished on the rigid main rotor head?
Flapping hinge and pitch horn
Teetering hinge and pitch horn
Blade grips and pitch horn
Blade flexing
How is Pitch change achieved on the Sikorsky S-76 MRH?
Metal Spindle and pitch horn assembly rotating inside multiple ball type thrust bearings mounted to a teetering hub
Metal Spindle and pitch horn assembly rotating inside multiple elastomeric bearings mounted to a fixed hub
Two composite sleeve assemblies with two elastomeric bearings, and a metallic pitch horn mounted to a flexible star assembly/hub
Metal Spindle and pitch horn assembly rotating inside multiple elastomeric bearings mounted to a flexible strap pack assembly
What is item # 26 on the Bell 47 MRH?
Grip
Counterweight Assembly
Gimbal Ring
Drag Brace
How does the Semi-rigid main rotor head deal with the Coriolis Effect?
Lead/Lag or hunting hinge
Teetering hinge
Underslung head design
Blade flexing
How is Pitch change achieved on the AS350/355 MRH?
Two composite sleeve assemblies with two elastomeric bearings, and a metallic pitch horn mounted to a flexible star assembly/hub
Metal Spindle and pitch horn assembly rotating inside multiple elastomeric bearings mounted to a fixed hub
Metal Spindle and pitch horn assembly rotating inside multiple ball type thrust bearings mounted to a teetering hub
Metal Spindle and pitch horn assembly rotating inside multiple elastomeric bearings mounted to a flexible strap pack assembly
How does the fully articulated main rotor head deal with the Coriolis Effect?
Blade flexing
Teetering hinge
Lead/Lag or hunting hinge
Underslung head design
What is item # 33 on the Bell 47 MRH?
Yoke
Trunnion
Pillow Block
Gimbal Ring
What is item # 18 as identified by the box around the number in the picture?
Sleeve-spindle assembly
Hub assembly
Flapping hinge pin
Lead/lag hinge assembly
What is the purpose of the trunnion assembly on the Bell 47 Main Rotor Head?
Acts as the lead/lag hinge point
Acts as the feathering hinge point
Acts as the teetering hinge point
Both a & b are correct
What type of rotor head is the Sikorsky S-76 MRH?
Rigid main rotor head
Semi-rigid main rotor head
Semi-articulated main rotor head
Fully articulated main rotor head
What is the definition of the term Span?
The distance rom the blade root to the blade tip along the centerline of the blade
The distance from the leading edge to the trailing edge
The angle between the chord line and the reference plane determined by the rotor hub
The acute angle between the relative wind and the chord line of the blade
What type of rotor head is the Hughes 500 MRH?
Rigid main rotor head
Semi-rigid main rotor head
Semi-articulated main rotor head
Fully articulated main rotor head
During the hover of a helicopter, which of the following conditions exist?
Lift and thrust are both vertical and they are greater than weight and drag
Lift and thrust are both vertical and they are equal to weight and drag
Lift is straight up, thrust is forward and weight and drag are downward
Lift is straight up, thrust is forward, weight is downward and drag is aft
What is centrifugal force trying to do to the main rotor blades?
Pull the blades out of the head
Force the blades into the center of the head
Make the blades bend upwards
Make the blades flex downwards
What is the purpose of the Counterweight assemblies on the Bell 47 MRH?
Static balance
Dynamic balance
Assist with pitch change
Reduce teetering
How is pitch change accomplished on the fully articulated main rotor head?
Blade flexing
Blade grips and pitch horn
Teetering hinge and pitch horn
Flapping hinge and pitch horn
What is item number 2?
Star assembly
Spherical thrust bearing
Droop restraint
Sleeve flange assembly
What is item # 21 on the Bell 47 MRH?
Pillow Block
Trunnion
Gimbal Ring
Yoke
What limits the amount of downward flexing of the blades when they are static or turning slowly?
Droop restraints
Flapping restraints
Primary stops
Hunting restraints
How are centrifugal loads from the blades supported in the Hughes 500 MRH?
An elastomeric bearing assembly at each end of the pitch housing assembly
Tension torsion straps installed between the pitch housing and hub assembly
A gland nut secures the spindle to the gimbal assembly
Stainless steel and Teflon impregnated cloth layers in a strap pack
What is item number 1?
Spherical thrust bearing
Star assembly
Sleeve flange assembly
Droop restraint
What type of bearing assembly supports the hub assembly on the stationary mast of the Hughes 500?
Needle bearings
Roller bearings
Tapered roller bearings
Ball type thrust bearings
What type of rotor head is the Eurocopter AS350/355 MRH?
Fully articulated main rotor head
Rigid main rotor head
Semi-rigid main rotor head
Semi-articulated main rotor head
How is dissymmetry of lift dealt with on a Semi-rigid main rotor head?
Flapping hinge
Teetering hinge
Underslung head design
Blade flexing
What is the purpose of the tension torsion strap in the Bell 206 MRH?
It is the lead/lag hinge
Transfers the centrifugal force from the grip to the head
Secures the grip to the yoke assembly
All of the above
In helicopter theory of flight, as drag is produced it is always parallel to which of the following?
Lift
Relative wind
Chord line
Weight
During an autorotation descent with the collective full down, what direction is the airflow through the main rotor system?
Down through the blades from the top to the bottom
Up through the blades from the bottom to the top
There is no air flow through the rotor system during the autorotation descent
There is only air flow through the rotor system when the collective is pulled up at the bottom of the descent
What is the purpose of an autorotation?
To allow the pilot to land helicopter safely under full engine power
To ensure that the helicopter rotor system automatically tilts forward as the cyclic is pushed forward
To ensure that the various components are rotated through the correct duty cycle during maintenance activities
To allow the pilot to land the helicopter safely with no engine power
According to the instructions for Autorotation Test Flights, which of the following is NOT one of the three pieces of information are required to be recorded during the Autorotation Decent?
Outside Air Temperature at the start of the procedure
Altimeter Reading at the start of the procedure
N1 Tachometer Reading during the procedure
Nr Tachometer Reading during the procedure
During the Autorotation Speed Calculation, which of the following is NOT one of the three parameters that you require to determine if the rotor RPM is correct based upon the Autorotation Chart?
Direction and speed of the wind at take-off
Helicopter Weight during the procedure
Density Altitude during the procedure
Nr Tachometer Reading during the procedure
{"name":"Rotary Review", "url":"https://www.quiz-maker.com/QPREVIEW","txt":"What are the gear systems inside the transmission of the Hughes 500 Transmission?, Which gear directly drives the output shaft for the tail rotor in the Hughes 500 Transmission?, What is the purpose of the tail rotor system?","img":"https://www.quiz-maker.com/3012/CDN/94-4576703/item-number-7.png?sz=1200"}
More Quizzes
Mennyire ismered a Marvel-moziverzumot?
520
Køkkenhavequiz
15820
Do you really know Nunu?
740
UT Events
320
כיצד לדעתכם הממשלה צריכה לפעול בתגובה לפיגועים?
100
Survey: (M3)
1585
Hygiene Quiz
11632
Natyrë/Biologji
840
Am I smarter than my weeb sensei?
1585
���નલાઇન ક્વિઝ
840
Agile Approach Assessment
27140
English Test for Hachu (10 questions)
1050