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M8 > M8 Revistion > Flashcards

M8 Revistion Flashcards

1
Q

Equation for Acceleration

A

Velocity change / time taken

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2
Q

Gravitational acceleration speed

A

9.8 meters per square second

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3
Q

Equation for force

A

Mass * Acceleration

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4
Q

Equation for weight

A

Mass * gravity

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5
Q

Equation for work done

A

Force * Distance

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6
Q

Equation for power

A

Force * Distance
/time

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7
Q

What is Pressure

A

The force acting on a unit of area.

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8
Q

Equation for static pressure

A

Height * Density * Gravity

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9
Q

Equation for Dynamic Pressure

A

Density * 0.5 * Speed^2

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10
Q

Equation for Pressure

A

Force / Area

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11
Q

How does speed of sound relate to temperature

A

The speed of sound is lower at lower temps and higher at higher temps.

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12
Q

Equation for Mach Number

A

Speed of Aircraft / Speed of Sound

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13
Q

What is Subsonic

A

Aircraft speed is below the speed of sound

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14
Q

What is Transonic

A

The aircraft speed is at the speed of sound

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15
Q

What is supersonic

A

Aircraft speed above the speed of sound

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16
Q

What is troposphere

A

The lowest layer where weather forms

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17
Q

What is staposhere

A

The heights level where there no weather and the temp stays the same

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18
Q

Tropopause

A

The boundary between the staposhere and the troposphere

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19
Q

What does I.S.A. stand for

A

International Standard Atmosphere

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20
Q

What are the ISA’s

A

288K
1.225 ks/m^2
-6.5K/1000m
1013.25Hpa

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21
Q

When is air Incompressible

A

When flight is in the subsonic region

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22
Q

Continuity equation states

A

The speed of the airflow is inversely proportional to the area of the cross section

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23
Q

What is a diffuser outlet

A

When the diameter increases and the speed decreases

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24
Q

What is a jet outlet

A

When the diameter decreases and the speed increases

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25
Q

Equation for Totle Pressure

A

Static pressure + dynamic pressure

26
Q

When is Bernoullis principle used

A

To measure airspeed

27
Q

What is Magnus effect

A

When the pressure on the top of the wing is equal to the bottom of the wing.

28
Q

What is profile

A

The cross section of the wing

29
Q

What is the chord line

A

A straight line connecting the leading edge to the trailing edge

30
Q

What is the mean camber line

A

A line drawn between the upper and lower surfaces of the profile

31
Q

What is camber

A

The displacement of the mean camber line from the chord line

32
Q

What i# fineness ratio

A

The fraction which determines the thickness of the wing profile

33
Q

What is flight path velocity

A

The speed of the aircraft in a curtain direction through the air

34
Q

What is relative wind

A

The speed and direction of the air acting on the aircraft

35
Q

What is Angle of attake

A

The angle between the chord line and the relative wind

36
Q

What is positive sweep

A

Wings pointing backwards

37
Q

What is negative sweep

A

Wings pointing forwards

38
Q

What is dihedral angle

A

Wings pointing up

(Positive dihedral)

39
Q

What is Anhedral Angle

A

Wing pointing down

(Negative Dihedral)

40
Q

What are the 2 components of aerodynamic forces

A

Lift and Drag

41
Q

Equation for theoretical lift

A

1/2 * p * v^2 * a

42
Q

Equation for coefficient of lift

A

Measured lift / theoretical lift

43
Q

Benefit of a thick profile wing

A

It can fly at slower speeds as it has a lower stall speed

44
Q

Disadvantage of a thick profile wing

A

Produces more drag and has a lower Mach Number

45
Q

What is centre of pressure

A

The point where all forces and pressures act

46
Q

Lift and drag depend on:

A

Surface area of profile
Dynamic pressure
Shape of profile
Edge of attack

47
Q

What are the effects of ice on the wing

A

Reduces the maximum coefficient and maximum angle of attack

48
Q

What is a polar diagram

A

Shows how lift and drag coefficients can be combined

49
Q

What is induced drag

A

Drag on the wing caused by lift

50
Q

What is parasite drag

A

Drag caused by aerodynamic interference

51
Q

What is compressible drag

A

Drag caused by a shockwave of an aircraft approaching the speed of sound

52
Q

What is the purpose of wingtips

A

To reduce induced drag

53
Q

What is form drag

A

When the pressure in front is different to the pressure behind.

54
Q

How to reduce form drag

A

By streamlining the aircraft

E.g. retracting the landing gear

55
Q

What is interference drag

A

The turbulence In the airflow caused by the sharp corners of components joined together

56
Q

How can interference drag be reduced

A

Use of fairings

57
Q

What are the 4 types of wing

A

Elliptical wing
Rectangular wing
Tapered wing
Swept wing

58
Q

What is aerodynamic centre

A

A point on the chord line where the magnitude of the pitching moment doesn’t change

59
Q

What is centre of lift

A

When the CL is in font of the C.G. the nose is pitched up and when the CL is behind the C.G. nose is pitched down

60
Q

What is the mean aerodynamic chord

A

The average chord length of a wing

61
Q

What is stall

A

When the angle of attack increases beyond a curtain point that lift begins to decrease.

62
Q

What are the 3 types of stall

A

Deep stall
Wing root stall
Wing tip stall

M8 (4 decks)

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