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Rotary Wing Control > Week 1 & 2 > Flashcards

Week 1 & 2 Flashcards

1
Q

Three Main Flight Controls of a fixed wing aircraft

A

Ailerons, Elevators, Rudders

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2
Q

What is the rotary wing equivalent to Rudder Pedals

A

Tail Rotor Pedals/Anti-torque pedals

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3
Q

What are the two flight controls that control the flight of a helicopter through the MAIN ROTOR

A

Cyclic and Collective

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4
Q

What is the full rotating of the blades called on a helicopter?

A

Disk

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5
Q

What does the CYCLIC give you?

A

Pitch/Roll

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6
Q

When you pull collective, each blade generates more ______

A

lift

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7
Q

When you PULL the COLLECTIVE, the engine would need to input

A

More Power

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8
Q

When the collective is pulled hard, and not enough counter-torque pedal can be applied, ______ ___ _______ __________ _________________ occurs

A

Loss of Tail Rotor Effectiveness

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9
Q

On a North American Helicopter, the pilot uses _______ pedal to fight torque

A

Left

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10
Q

What is in between the two swash plates, allowing the top plate to turn?

A

Swash Plate Bearing

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11
Q

The compressor turbines turn the _______ _____ set of turbines

A

Power Shaft

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12
Q

The top swash plate is connected to the blades through ______ _____

A

Pitch Links

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13
Q

The lift vector is at…?

A

Right angles to the rotor disk

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14
Q

The Collective is responsible for two things…?

A

Altitude and Forward Airspeed

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15
Q

As the Main Rotor rotates, the helicopter wants to spin in the opposite direction, this is called…?

A

Torque Reaction

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16
Q

What do helicopters tend to do when hovering without any inputs from the pilot?

A

Drift sideways, Fly forwards

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17
Q

Main Rotor Pitch links are attached to the?

A

Rotating Swash Plate

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18
Q

How does the Mast and the Rotating Swash Plate rotate in sync?

A

Through the use of Scissor Links

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19
Q

The Final Link to the blades from the Flight Controls are called?

A

Pitch Links

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20
Q

_________ _________ connect the Pilot and Co-Pilot Flight Controls

A

Torque Tubes

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21
Q

_____ ________ are designed to change the direction of a push/pull tube

A

Bell Cranks

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22
Q

Cyclic makes the Swash Plates ______

A

Tilt

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23
Q

Cyclic attachments have to be ___ _________ apart

A

90 Degrees

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24
Q

On the Cyclic, the Red Trigger is for _______________

A

Communication (PTT)

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25
Q

What are the two different switches on the collective stick?

A

Landing Lights and Starter Switch

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26
Q

Collective Sticks also often have a _______ - ______ throttle

A

Twist - Grip

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27
Q

True or False: Main rotor RPM Remains Constant?

A

True

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28
Q

_________ _________ slows the up and down movement of the collective

A

Friction Control

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29
Q

Ground Effect occurs when the helicopter is within _____ _________ __________ from the ground

A

1/2 Rotor Diameter

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30
Q

If the Main rotor on a Helicopter spins CLOCKWISE, which direction does the tail rotor BLOW air?

A

To the RIGHT of the helicopter

31
Q

What does “IGE” stand for?

A

In Ground Effect

32
Q

What does “OGE” Stand for?

A

Out of ground effect

33
Q

If you can see the white nav light of an aircraft, where is it moving,relative to your position?

A

Away from you

34
Q

If the green nav light is on the left side, where is the aircraft moving, relative to your position?

A

Towards you

35
Q

Can you hover at higher altitudes in IGE or OGE?

A

IGE

36
Q

__________ _____________ - a force occurs 90 degrees from the force applied in the direction of rotation

A

Gyroscopic Precession

37
Q

When does Translational Lift occur?

A

At the transition period between hover and horizontal flight

38
Q

_______________ occurs when the engine fails, allows the blades to spin freely to allow a safe landing

A

Autorotation

39
Q

What does the rotor system do when the engine power train fails?

A

Disengages from the engine to allow free spinning in the direction of rotation

40
Q

Which of Newton’s laws is torque and torque reaction?

A

Newton’s Third Law

41
Q

Which rotor configuration is this?

A

Tandem

42
Q

Which rotor configuration is this?

A

Coaxial

43
Q

Which rotor configuration is this?

A
44
Q

To give the helicopter fuselage Directional Control,a __________ _______ _________ is vertically mounted on the tail. In order to keep the fuselage straight when increasing power, thepitchof the tail rotor is increased, using thefoot pedals

A

Variable Pitch Rotor

45
Q

During normal operation, the direction of the flow of air is __________

A

Downward

46
Q

During autorotation, the direction of the airflow through the main rotor is __________

A

Upwards

47
Q

During Autorotation, the ______ must be maintained at a safe level

A

RPM

48
Q

What is the problem with having a high Nr during autorotation?

A

Overspeed and structural damage

49
Q

What is the problem with a Low Nr during autorotation?

A

Helicopter can’t slow rate of descent/ will crash

50
Q

When the engine fails, and the blades begin to autorotate, what must the pilot do?

A

Drop the collective stick

51
Q

Which factors affect the RPM of the blades during autorotation

A

Air Density(Altitude), Temperature, weight

52
Q

_____________ __________ is the tendency for the whole helicopter to drift in the direction of the tail rotor thrust

A

Translational Tendency

53
Q

What type of tail-rotor configuration is this?

A

Fenestron

54
Q

What type of tail-rotor is this?

A

NOTAR

55
Q

Locate the servos, push/pull tubes, bell cranks

A
56
Q

On a free turbine helicopter, what is the twist-grip used to control?

A

Compressor RPM

57
Q

A ________ _____ is often placed on top of the collective, containing engine trim switches, landing lights, searchlights, and the starter button.

A

Switch box

58
Q

Bell cranks are used for…

A

Changing Direction of force + Mechanical Advantage

59
Q

What does the torque tube to?

A

Connects two components// eg// collective control for pilot and copilot

60
Q

What is Item 21.?

A

Outer Ring/Upper Swash Plate

61
Q

What is Item 20?

A

Lower Swash Plate/Inner Ring

62
Q

What is Item 11?

A

Drive Link

63
Q

What connects to the Upper Swash Plate/Outer Ring?

A

Pitch Links

64
Q

What connects to the Lower Swash Plate/Inner Ring?

A

Flight Controls

65
Q
A
66
Q

The mast is sometimes ________ to combat the translating tendency

A

Tilted

67
Q

Another way to combat translational tendency is to….

A

Offset the Vertical Fin, keeping the fuselage straight in forward flight. This unloads the tail rotor

68
Q

Which type of Main Rotor Head is most susceptible to ground resonance?

A

Fully Articulated

69
Q

How can the pilot immediately correct ground resonance?

A

Pull on the collective lever

70
Q

What components of the helicopter help prevent ground resonance?

A

Shock Absorbers

71
Q

What can a technician/AME do to reduce ground resonance?

A

Service shock struts

72
Q

What causes ground resonance?

A

Blade lead/lag (Out of Phase)

73
Q

What does the swashplate do?

A

Transfers the movement of the cyclic and collective from stationary push-pull to rotating push-pull movements

74
Q
A

Rotary Wing Control (3 decks)

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