M8 Revistion

Question 1

Equation for Acceleration

Answer 1

Velocity change / time taken

Question 2

Gravitational acceleration speed

Answer 2

9.8 meters per square second

Question 3

Equation for force

Answer 3

Mass * Acceleration

Question 4

Equation for weight

Answer 4

Mass * gravity

Question 5

Equation for work done

Answer 5

Force * Distance

Question 6

Equation for power

Answer 6

Force * Distance
/time

Question 7

What is Pressure

Answer 7

The force acting on a unit of area.

Question 8

Equation for static pressure

Answer 8

Height * Density * Gravity

Question 9

Equation for Dynamic Pressure

Answer 9

Density * 0.5 * Speed^2

Question 10

Equation for Pressure

Answer 10

Force / Area

Question 11

How does speed of sound relate to temperature

Answer 11

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

Question 12

Equation for Mach Number

Answer 12

Speed of Aircraft / Speed of Sound

Question 13

What is Subsonic

Answer 13

Aircraft speed is below the speed of sound

Question 14

What is Transonic

Answer 14

The aircraft speed is at the speed of sound

Question 15

What is supersonic

Answer 15

Aircraft speed above the speed of sound

Question 16

What is troposphere

Answer 16

The lowest layer where weather forms

Question 17

What is staposhere

Answer 17

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

Question 18

Tropopause

Answer 18

The boundary between the staposhere and the troposphere

Question 19

What does I.S.A. stand for

Answer 19

International Standard Atmosphere

Question 20

What are the ISA’s

Answer 20

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

Question 21

When is air Incompressible

Answer 21

When flight is in the subsonic region

Question 22

Continuity equation states

Answer 22

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

Question 23

What is a diffuser outlet

Answer 23

When the diameter increases and the speed decreases

Question 24

What is a jet outlet

Answer 24

When the diameter decreases and the speed increases

Question 25

Equation for Totle Pressure

Answer 25

Static pressure + dynamic pressure

Question 26

When is Bernoullis principle used

Answer 26

To measure airspeed

Question 27

What is Magnus effect

Answer 27

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

Question 28

What is profile

Answer 28

The cross section of the wing

Question 29

What is the chord line

Answer 29

A straight line connecting the leading edge to the trailing edge

Question 30

What is the mean camber line

Answer 30

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

Question 31

What is camber

Answer 31

The displacement of the mean camber line from the chord line

Question 32

What i# fineness ratio

Answer 32

The fraction which determines the thickness of the wing profile

Question 33

What is flight path velocity

Answer 33

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

Question 34

What is relative wind

Answer 34

The speed and direction of the air acting on the aircraft

Question 35

What is Angle of attake

Answer 35

The angle between the chord line and the relative wind

Question 36

What is positive sweep

Answer 36

Wings pointing backwards

Question 37

What is negative sweep

Answer 37

Wings pointing forwards

Question 38

What is dihedral angle

Answer 38

Wings pointing up (Positive dihedral)

Question 39

What is Anhedral Angle

Answer 39

Wing pointing down (Negative Dihedral)

Question 40

What are the 2 components of aerodynamic forces

Answer 40

Lift and Drag

Question 41

Equation for theoretical lift

Answer 41

1/2 * p * v^2 * a

Question 42

Equation for coefficient of lift

Answer 42

Measured lift / theoretical lift

Question 43

Benefit of a thick profile wing

Answer 43

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

Question 44

Disadvantage of a thick profile wing

Answer 44

Produces more drag and has a lower Mach Number

Question 45

What is centre of pressure

Answer 45

The point where all forces and pressures act

Question 46

Lift and drag depend on:

Answer 46

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

Question 47

What are the effects of ice on the wing

Answer 47

Reduces the maximum coefficient and maximum angle of attack

Question 48

What is a polar diagram

Answer 48

Shows how lift and drag coefficients can be combined

Question 49

What is induced drag

Answer 49

Drag on the wing caused by lift

Question 50

What is parasite drag

Answer 50

Drag caused by aerodynamic interference

Question 51

What is compressible drag

Answer 51

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

Question 52

What is the purpose of wingtips

Answer 52

To reduce induced drag

Question 53

What is form drag

Answer 53

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

Question 54

How to reduce form drag

Answer 54

By streamlining the aircraft E.g. retracting the landing gear

Question 55

What is interference drag

Answer 55

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

Question 56

How can interference drag be reduced

Answer 56

Use of fairings

Question 57

What are the 4 types of wing

Answer 57

Elliptical wing Rectangular wing Tapered wing Swept wing

Question 58

What is aerodynamic centre

Answer 58

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

Question 59

What is centre of lift

Answer 59

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

Question 60

What is the mean aerodynamic chord

Answer 60

The average chord length of a wing

Question 61

What is stall

Answer 61

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

Question 62

What are the 3 types of stall

Answer 62

Deep stall Wing root stall Wing tip stall