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AAMT2-8 > 2104 > Flashcards

2104 Flashcards

1
Q

forces acting on the aircraft

A

drag, lift, weight, thrust

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2
Q

opposes the downward force of weight, is produced by the dynamic effect of the air acting on the airfoil and acts perpendicular to the flightpath through the center of lift.

A

lift

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3
Q

the combined load of the aircraft itself, the crew, the fuel, and the cargo or baggage. Weight pulls the aircraft downward because of the force of gravity. It opposes lift and acts vertically downward through the aircraft’s center of gravity (CG).

A

weight

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4
Q

the force produced by the power plant/ propeller or rotor. It opposes or overcomes the force of drag. As a general rule, it acts parallel to the longitudinal axis. However, this is not always the case, as explained later.

A

thrust

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5
Q

a rearward, retarding force caused by disruption of airflow by the wing, rotor, fuselage, and other protruding objects. Drag opposes thrust and acts rearward parallel to the relative wind.

A

drag

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6
Q

the total lift and thrust forces of a rotor are perpendicular to the rotor disk.

A

powered flight

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7
Q

most challenging part of flying a helicopter. This is because a helicopter generates its own gusty air while in a hover, which acts against the fuselage and flight control surfaces.

A

hovering flight

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8
Q

Increasing the angle of incidence of the rotor blades (pitch) while keeping their rotation speed constant generates additional lift and the helicopter ascends. Decreasing the pitch causes the helicopter to descend. In a no-wind condition in which lift and thrust are less than weight and drag, the helicopter descends vertically. If lift and thrust are greater than weight and drag, the helicopter ascends vertically.

A

vertical flight

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9
Q

the tip-path plane is tilted in the direction that flight is desired. This tilts the total lift-thrust vector sideward. In this case, the vertical or lift component is still straight up and weight straight down, but the horizontal or thrust component now acts sideward with drag acting to the opposite side.

A

sideward

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10
Q

the tip-path plane is tilted rearward, which, in turn, tilts the lift-thrust vector rearward. Drag now acts forward with the lift component straight up and weight straight down.

A

rearward flight

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11
Q

upward sweeping angle of the rotor blades as a result of lift and centrifugal force. In order for a helicopter to generate lift, the rotor blades must be turning.

A

coning

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12
Q

It states that the value of angular momentum of a rotating body does not change unless an external force is applied. In other words, a rotating body continues to rotate with the same rotational velocity until some external force is applied to change the speed of rotation. Angular momentum is the moment of inertia (mass times distance from the center of rotation squared) multiplied by the speed of rotation.

A

coriolis effect / law of conservation of angular momentum

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13
Q

state of flight where the main rotor disk of a helicopter is being turned by the action of air moving up through the rotor rather than engine power driving the rotor. In normal, powered flight, air is drawn into the main rotor disk from above and exhausted downward, but during autorotation, air moves up into the rotor disk from below as the helicopter descends.

A

autorotation

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14
Q

most common type of helicopter

A

single rotor system

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15
Q

anti-torque device

A

tail rotor or other anti-torque system

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16
Q

has two main rotor systems and no tail rotor. Usually the rear rotor is mounted at a higher position than the front rotor, and the two are designed to avoid the blades colliding, should they flex into the other rotor’s pathway.

A

tandem rotor helicopter

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17
Q

The rotor discs are slightly tilted toward each other to provide control along the vertical axis during the hover. This configuration, which is mainly used for larger helicopters, has the advantage of being able to support more weight with shorter blades.

A

tandem rotor helicopter

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18
Q

two main rotors mounted on one mast, sharing the same axis of rotation but turning in opposite directions, one on top of the other. The control along the vertical axis is produced as a result of different lifts, thus differential torque, of the two rotor discs.

A

co-axial rotor system

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19
Q

The helicopter will yaw to the left if the clock wise rotating rotor produces more lift, and it will yaw to the right if more lift is produced by the counter-clock wise rotating rotor.

A

co-axial rotor system

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20
Q

two rotors turning in opposite directions and mounted on two masts slightly inclined towards each other, so that the blades intermesh (without colliding)

A

synchropter

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21
Q

two horizontals, counter-rotating rotors are mounted side-by-side on a helicopter (or transverse rotorcraft). The anti-torque effect is provided by the opposing rotation of the two main rotors.

A

side by side configuration

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22
Q

The rotors are mounted at the edge of the wings, on nacelles that rotate in order to transition the rotors from the vertical position (to provide vertical lift like a side by side rotor configuration helicopter), to the horizontal position (where they provide horizontal lift, or thrust, just like in airplanes).

A

tilt rotor configuration

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23
Q

is a helicopter system which avoids the use of a tail rotor. uses jet thrust rather than blades to provide directional stability and reduce noise, providing the world’s quietest helicopters.

A

NOTAR (NO TAIL ROTOR CONFIGURATION)

24
Q

basic helicopter flight control system

A

cyclic control, collective control, anti-torque pedals

25
Q

changes the tilt of the main rotor for control about the longitudinal axis (roll) and lateral axis (pitch).

A

cyclic pitch control

26
Q

varies the lift of the main rotor by increasing or decreasing the pitch of all blades at the same time. It is also used in coordination with cyclic pitch control to regulate the airspeed of the helicopter.

A

collective pitch control

27
Q

mounted on the collective pitch grip and is operated by rotating the motorcycle–type grip.

A

throttle control

28
Q

Rotating the grip outboard ________ rpm, and rotating it inboard _________ rpm.

A

increases, ecreases

29
Q

provides for movement about the vertical axis (yaw). This movement is controlled by the directional control pedals in the cockpit.

A

anti-torque pedals

30
Q

The Anti-Torque Pedals, also known as

A

“torque control”

31
Q

is a sensing device that senses rotor and engine r.p.m. and makes the necessary adjustments in order to keep rotor r.p.m. constant. In normal operations, once the rotor r.p.m. is set, the governor keeps the r.p.m. constant, and there is no need to make any throttle adjustments.

A

governor

32
Q

mechanical connection between the collective lever and the engine throttle. When the collective lever is raised, power is automatically increased and when lowered, power is decreased. This system maintains r.p.m. close to the desired value, but still requires adjustment of the throttle for fine tuning.

A

correlator

33
Q

is a heavier- than-air flying machine that generates lift using rotary wings or rotor blades, which revolve around a mast.

A

rotorcraft

34
Q

is a heavier- than-air flying machine that generates lift using rotary wings or rotor blades, which revolve around a mast.

A

Rotorcraft

35
Q

Several rotor blades mounted on a single mast are referred to as a

A

Rotor

36
Q

The earliest references for vertical flight came from
China.

A

Chinese top

37
Q

Chinese bamboo helicopters have been here sinc

A

400 BC

38
Q

Chinese children have played with

A

Bamboo flying toys or Chinese top

39
Q

This bamboo-copter is spun by _____ a stick attached to a rotor

A

Rolling

40
Q

Trade from the Far East resulted in the Chinese toys reaching Europe in the early Renaissance, likely inspiring Leonardo da Vinci to create a drawing called the

A

Aerial Screw

41
Q

Year of Aerial Screw

A

1483 to 1486

42
Q

Designed a model flying machine using coaxial propellers and a coiled spring for propulsion

A

Gustave Vicomte de Ponton d’Amècourt

43
Q

a model flying machine using coaxial propellers and a coiled spring for propulsion

A

Helicopteres

44
Q

The helicopter that considered as America’s first production helicopter.

A

SIKORSKY’S XR-4

45
Q

A helicopter that used two 6.1 meters (20 ft) counter-rotationg rotors driven by a 24 hp (18 kW) Antoniette Engine

A

Cornu Helicopter

46
Q

The machine that achieved its first vertical ascent on either
August 24 or September 29

A

Gyroplane No. 1

47
Q

Most common type of helicopter configuration.

A

Single Rotor Configuration

48
Q

Two main rotors mounted on one mast, sharing the same axis of rotation but turning in opposite directions.

A

Co-axial rotor

49
Q

When was the AH-64 “Apache” helicopter performed well as both a tank killer and fast-assault vehicle.

A

1991 Gulf War

50
Q

has two main rotor systems and no tail rotor, usually the rear rotor is mounted at a higher position than the front rotor.

A

Tandem Rotor

51
Q

considered to be the first controlled helicopter flight.

A

Autogiro No. 4

52
Q

most popular helicopter in the U.S. military

A

UH-60

53
Q

On what datw Sikorsky took the VS-300 flight

A

September 14, 1939

54
Q

A separate rotor that overcomes torque.

A

Tail rotor

55
Q

Where is collective pitch control located

A

left side of the pilot’s seat and is operated with the left hand.

56
Q

The rotorcraft had a 45-horsepower engine, just powerful enough to hover for 2 minutes.

A

Gyroplane No.1

AAMT2-8 (10 decks)

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