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block 1&2 > 10 LP Principles Of Flight > Flashcards

10 LP Principles Of Flight Flashcards

1
Q

What is the primary source of lift

A

Pressure differential around an airfoil

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2
Q

What is the result of Bernoulli’s principle

A

Lift

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3
Q

What is a secondary source of lift

A

And upward force generated by air striking the underside of an airfoiland being deflected downwards

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4
Q

What is generated when an upward force of airstrikes the underside of an airfoil

A

The secondary source of lift

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5
Q

The primary source of lift on an airfoil is created by a differential in

A

Pressure

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6
Q

The statement “ the internal pressure of a fluid decreases at the point where the speed of the fluid increases” is a part of

A

Bernoulli’s principle

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7
Q

The direction of airflow produced by an object moving through the air

A

Relative wind

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8
Q

The relative wind for an aircraft in-flight flows in a direction ______ with and ______ to the direction of flight

A

Parallel

Opposite

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9
Q

What determines the direction of relative wind

A

Actual flight path of the aircraft

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10
Q

What are The three principal airfoils that produce lift on an aircraft

A

Wing, horizontal tail surfaces, propeller

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11
Q

What are the three parts of an airfoil

A

Leading edge, trailing edge, chord line

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12
Q

And imaginary straight line drawn from the leading edge to the trailing edge of a cross-section of an airfoil

A

Chord line

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13
Q

The acute angle formed between the cord line of an airfoil and the direction of the air striking the airfoil

A

Angle of attack

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14
Q

The curvature of the airfoil from the leading-edge to the trailing edge

A

The camber

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15
Q

The shape or form of a wing as viewed from above

A

Wing platform

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16
Q

The four forces affecting flight

A

Lift weight thrust drag

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17
Q

Upward force created by an airfoil when it is moved through the air

A

Lift

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18
Q

Downward force which tends to draw all bodies vertically toward the center of the earth

A

Weight

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19
Q

Man-made force that pulls or pushes the aircraft are there

A

Thrust

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20
Q

Rear word acting force which resists the forward movement of that airplane through the air

A

Drag

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21
Q

If Lift is greater than weight

A

Aircraft will climb

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22
Q

If weight is greater than lift

A

The aircraft will descend

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23
Q

More thrust =

A

More drag

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24
Q

Three key properties of the atmosphere that affect air density and aircraft performance

A

Temperature, altitude, water vapor/humidity

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25
Q

As altitude increases the temperature decreases on average

A

2°C every thousand feet until the air temperature reaches about 67° at 7 miles above earth

26
Q

Is cold air denser than warm air?

A

Yes

27
Q

A decrease temperature with height

A

Lapse rate

28
Q

What is the measurement of 29.92 in inches of _____

A

Inches of mercury

29
Q

Pressure ______ with height

A

Decreases

30
Q

Lower pressure results in

A

Less dense air

31
Q

The altitude in the standard atmosphere corresponding to a particular value of air density

A

Density altitude

32
Q

Higher density altitude indicates

A

Lower density air, thinner air

33
Q

A device for propelling an aircraft that when rotated, produces by its action on the air, a breast approximately perpendicular to its plane of a rotation

A

Propeller

34
Q

What are the three different types of propellers

A

Adjustable pitch, fixed pitch, controllable pitch

35
Q

What are the three axes of rotation on an aircraft

A

Longitudinal axis, role,
lateral axis, pitch,
vertical axis, yaw

36
Q

An imaginary straight line through the fuselage nose to tail

A

Longitudinal axis, roll

37
Q

A line through the wing from wingtip to wingtip

A

Lateral access, pitch

38
Q

A line through the center of gravity from top to bottom

A

Vertical axis, yaw

39
Q

What do these control
Ailerons
Elevator
Rudder

A

Controls roll,- longitudinal
moves as the units/controls pitch,- lateral
controls yaw- vertical

40
Q

A hinge surface normally mounted on out board trailing edge of the wing

A

Ailerons

41
Q

The control you control the ______ and _____

A

Ailerons

Elevator

42
Q

A hinge surface normally located on the rear of a horizontal stabilizer

A

The elevator

43
Q

The aft of the vertical stabilizer

A

The rudder

44
Q

How is the rudder controlled

A

By the rudder pedals on the floor

45
Q

Small, adjustable, hinged surfaces on the trailing edge of the primary control surface

A

Trim tabs

46
Q

What is the purpose of trim tabs

A

To lessen the manual pressure on the controls

47
Q

Located in board on the wings trailing edge and are used to increase lift

A

Flaps

48
Q

The extension of flaps causes an increase in

A

Drag

49
Q

What does the cyclic and collective control

A

Cyclic equals tilt, collective equals pitch

50
Q

The state a flight where the main rotor system has been turned by the action of relative wind rather than engine power

A

Auto rotation

51
Q

When does a stall occur

A

15-20 degrees

The airfoil reaches a critical angle of attack

52
Q

Three primary causes of stalls

A

Insufficient airspeed, excessive violence flight maneuvers, severe wind shear

53
Q

Three types of icing

A

Structural Icing,
Pito static system icing,
carburetor Icing

54
Q

Changes the shape of the airfoil

A

Structural Icing

55
Q

What type of icing reduces the fuel/airflow to the engine

A

Carburetor Icing

56
Q

Name five aircraft system failures

A 
Electrical, 
mechanical, 
hydraulic, 
engine, 
engine fire
57
Q

What type of failure? Some instruments, flaps on some aircraft, radios, navigation and transponder equipment, lights

A

Electrical failure

58
Q

What kind of failure? Landing gear, blown tire, wheel off, panel off, flight controls, windshield

A

Mechanical failure

59
Q

What kind of failure? Effects landing gear, flaps, brakes on some aircraft

A

Hydraulic failure

60
Q

What kind of failure? Engine driven vacuum system for instruments, hydraulic power, electrical power, pressurization, forced landing, loss of altitude

A

Engine failure

61
Q

What type of failure is usually controllable

A

Engine fire

block 1&2 (13 decks)

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