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#1 Flashcards

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1
Q

Define Speed

A

The rate at which an object moves.

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2
Q

Define Velocity

A

The speed of an object in a specified direction.

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3
Q

Is Speed a Scalar qualitiy?

A

Yes.

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4
Q

Describe Vectors

A

Can be dragrammatically summed to find a result

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5
Q

Define Force

A

Has a magnitude and direction

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6
Q

Define Newton’s First Law

A

An object in space that is travelling at a constant speed will remain constant unless an external force is applied.

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7
Q

Define Newton’s Second Law

A

If a force is applied to an object, the object will accelerate at a rate that is proportional to its mess and the force applied (F = ma).

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8
Q

Define Newton’s Third Law

A

For every action, there is an equal and opposite reaction.

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9
Q

Define Energy

A

An objects capacity to do work

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10
Q

List the two types of energy

A

Kinetic and Potential

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11
Q

Define Kinetic Energy

A

The energy a body possess by virtue of it’s motion

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12
Q

Define Potential Energy

A

The energy a body possess by virtue of its position in a force field

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13
Q

Define Gas

A

A group of molecules which are not bonded to each other

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14
Q

Define Gas Density

A

The quantity of particles in a unit of volume

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15
Q

What is the density of gas a function of?

A

Temperature and Pressure

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16
Q

List the four forces acting on an aircraft.

A

Lift, Weight, Thrust and Drag

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17
Q

Define Lift

A

The component of the total reaction which is perpendicular to the flight path of relative air flow.

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18
Q

Define Weight

A

The gravitational attraction to the Earth

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19
Q

Define Thrust

A

The propulsive force from a jet or propeller

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20
Q

Define Drag

A

The component of the total reaction that is parallel to the flight path

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21
Q

Define the Chord Line

A

A straight line joining the centres of curvature of the leading and trailling edges

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22
Q

Define Camber

A

The maximum distance between the mean camber line and the chord line, expressed as a percentage

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23
Q

Define Relative Air Flow

A

Oncoming wind

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24
Q

Define the Angle of Attack (AoA)

Study These Flashcards
A

The angle difference between the chord line and relative air flow

25
Lift Formula
L = Co-efficient of Lift × 1/2 × Air Pressure (Rho [P]) × Velocity^2 × Surface of the wing
26
What is Lift Dependent Drag?
Induced drag through lift
27
Define Static stability
The initial reaction of an object after a force has been applied
28
Define Dynamic stability
The subsequent reaction of an object after a force has been applied
29
Define Stall
When the aircrafts Angle of Attack is greater than its critical angle (16 degrees)
30
Describe the effect of stall on an aircraft
A reduction in lift is accompanied by the breakdown of airflow over the wings
31
What generates thrust (relative to a KA350)?
The engine generates power, the propeller generates thrust
32
How is thrust applied (relative to the KA350)?
The propeller takes a large mass and generates small acceleration
33
How is Drag created?
Created by the lifting part of the wing and by the shape of various parts of the aircraft not producing/creating lift
34
Describe symptoms of the stall
High Nose Attitude, Reducing airspeed, Less responsive controls, Buffeting, Unaccompanied pitch down and Stall warning
35
How is Thrust applied?
The propellers take a large mass and generate small acceleration
36
How is Drag created?
Created by the lifting action of the wings and the various parts of the aircraft not producing lift
37
How is the Chord line defined?
By the straight line joining the centres of curvature of the leading and trailling edges
38
Aerodynamic lift force always acts perpendicular to what?
Relative Airflow
39
Define Static stability
The initial reaction of an object after a force has been applied
40
Define Dynamic stability
The subsequent reaction of an object after a force has been applied
41
Stalling speed is increased by an increase of what?
Load factor
42
An effect of exceeding the stalling angle is that?
Lift decreases and drag increases
43
Define TORA (Take-Off Run Available)
The length of the runway available for the ground run of an aircraft taking-off
44
Define TODA (Take-Off Distance Available)
The total length of runway distance available for an aircraft to achieve screen height
45
Define TODR (Take-Off Distance Required)
The total distance required for an aircraft to accelerate from a standing start and climb to a screen height
46
Define ASDA (Accelerate/Stop Distance Available)
TORA + any stopway. The distance available for an aircraft to achieve V1, have an engine failure, and be able to come to a halt.
47
List the factors that increase take-off distance
Aircraft weight, Airfield attitude, Air Temperature, Runway surface conditions, Runway slope, Wind.
48
When is the best Rate of Climb required?
When best time to height is required
49
When is the best Angle of Climb used?
Used to clear an obstacle
50
Define Range
Is the total distance an aircraft can travel for a given weight of fuel
51
Define Endurance
Is the total time an aircraft can stay in the air for a given weight of fuel
52
State the effect that needs to occur when ice formation is present over the aerofoil
Increase thrust due to an increase in the stall speed
53
Define VMCA
The minimum speed with gear up, take off flap set, failure of the critical engine (feathered), and full power on the remaining live engine at which the aircraft can be maintained
54
What is the Velocity At Threshold (VAT)?
Based on 1.3 times the stall speed
55
What are the stall speed increase ratios in a bank of 30/45/60 degrees?
30 degrees = 1.07 (7%). 45 degrees = 1.19 (19%). 60 degrees = 1.41 (41%)
56
List the effects of an Engine Failure
Decreased performance. Decreased operating ceiling. Decreased airspeed. Alters SAR and SGR. Safety implications of remaining above safety height.
57
What is the climb gradient?
The distance traveled vertically divided by the distance covered across the ground
58
Describe asymmetric flight?
50% power loss = 80% performance loss. Steady flight achieved through: failed engine shut and feathered, gear and flap retracted, 5 degree bank, limitation of bank angle

Aerodynamics (1 decks)

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