8

Question 1

4 fundamentals in aerodynamics?

Answer 1

Mass, Length, Time and Temperature

Question 2

Symbol for speed?

Answer 2

V

Question 3

Formula for speed?

Answer 3

Speed = Distance / Time

Question 4

Symbol for acceleration?

Answer 4

a

Question 5

Formula for acceleration?

Answer 5

Acceleration = Change in velocity/Time taken

Question 6

Symbol for acceleration due to gravity?

Answer 6

G

Question 7

What is the average acceleration due to gravity?

Answer 7

9.8ms*2

Question 8

What is acceleration measured in?

Answer 8

Metres per square second

Question 9

Calculation for weight?

Answer 9

Weight = Mass x Acceleration due to gravity

Question 10

Calculation for work?

Answer 10

Work = Force x Distance

Question 11

What is Work measured in?

Answer 11

Newton metres or Joules

Question 12

Calculation for Force?

Answer 12

Force = Mass x Acceleration

Question 13

What is Force measured in?

Answer 13

Newton’s

Question 14

What is the measurement for Power?

Answer 14

Watts/Newton metres per second

Question 15

Calculation for Power?

Answer 15

Power = Force x Distance
———————
Time

Question 16

What is the unit for work?

Answer 16

Joules (J)

Question 17

What is the symbol for static pressure?

Answer 17

p

Question 18

What is the formula for pressure?

Answer 18

Pressure = Force/Area

Question 19

What is static pressure?

Answer 19

Static pressure acts equally in all directions

Question 20

What is dynamic pressure?

Answer 20

Dynamic pressure acts only in the direction of flow

Question 21

What is the symbol for dynamic pressure?

Answer 21

q

Question 22

What is the symbol for the speed of sound?

Answer 22

a

Question 23

What is the formula to calculate the speed of sound?

Answer 23

Speed of sound = 20 x (sq. root of T(Kelvin))

Question 24

What is the constant used in the formula for the speed of sound?

Answer 24

20

Question 25

What is a diffuser outlet?

Answer 25

When diameter increases and speed decreases

Question 26

What is a jet outlet?

Answer 26

Diameter decreases and speed increases

Question 27

What is Bernoulli’s principle?

Answer 27

Total pressure is always the sum of static pressure and dynamic pressure. The total pressure remains constant.

Question 28

What is the point of stagnation?

Answer 28

The speed of the airflow falls to zero and the static pressure equals the total pressure.

Question 29

Where is up-wash experienced?

Answer 29

At the leading edge of the wing

Question 30

Where is down-wash experienced?

Answer 30

At the trailing edge of the wing

Question 31

What is the Magnus Effect?

Answer 31

A rotational cylinder creates an increased local speed on the top and decreased on the bottom

Question 32

How do vortices form?

Answer 32

They form in pairs, rotating counter clockwise

Question 33

What is a profile?

Answer 33

A cross-sectional area of a wing

Question 34

What can a wing and profile section also be called?

Answer 34

Aerofoil and Aerofoil Section

Question 35

What is the camber?

Answer 35

The camber of the profile is the displacement of the mean camber line from the chord line.

Question 36

What camber would you find on a typical low speed profile aerofoil?

Answer 36

A minimum camber at 5% located 45% aft of the leading edge

Question 37

What is the Fineness Ratio?

Answer 37

The maximum thickness of a profile defined as a fraction

Question 38

What thickness would you find on a typical low speed profile?

Answer 38

A typical low speed profile might have a maximum thickness of 18% located 30% aft of the leading edge.

Question 39

What is the Angle of Attack?

Answer 39

Symbol is alpha - The angle between the chord line and the relative wind

Question 40

What is the Angle of Incidence?

Answer 40

Symbol is Gamma - the angle between the chord line and the longitudinal axis of the aircraft

Question 41

How do you calculate wing area?

Answer 41

Wing span x Wing chord

Question 42

What is the symbol for the Taper Ratio?

Answer 42

Lambda

Question 43

What is the Taper Ratio?

Answer 43

It is the ratio between the tip chord and the root chord (Ct/Cr)

Question 44

What is the aspect ratio?

Answer 44

The wing span divided by the average chord

Question 45

What is the sweep angle?

Answer 45

The sweep angle is the angle between the line of 25% chords and a line perpendicular to the root chord.

Question 46

Which direction does a positive sweep go?

Answer 46

Backwards

Question 47

What is the dihedral angle?

Answer 47

When the wing tip is either above or below the horizontal plane