Principles of Flight

Question 1

The international standard atmosphere sets out….

Answer 1

Theoretical values for temperature, pressure and density at all levels

Question 2

The lapse rate for ISA is

Answer 2

2 degrees for 1000 feet

Question 3

The main constituents of the earths atmosphere are

Answer 3

Oxygen (21%), Nitrogen (78%) and Other 1%

Question 4

The ratio of Nitrogen to Oxygen is

Answer 4

1:4

Question 5

The troposphere is characterised by a…

Answer 5

decrease in temperature with increasing altitude

Question 6

How is density related to pressure

Answer 6

Proportional to pressure

Inversely proportional to temperature

Question 7

If the temperature of an air mass remains constant, increasing pressure will…

Answer 7

cause the density to increase

Question 8

The coefficient of lift is at its maximum

Answer 8

just before the stall angle

Question 9

If an aircraft doubles its speed (all other factors constant) its lift will

Answer 9

Quadruple

Question 10

The angle of attack is measured between

Answer 10

The chord line and relative air flow

Question 11

In normal flight, air flow over the top of a wing will

Answer 11

increase in speed

Question 12

Induced drag ? as airspeed increases

Answer 12

decreases

Question 13

In a stall where does flow separation begin

Answer 13

Upper surface trailing edge

Question 14

A slat will …

Answer 14

Delay the stall until a higher angle of attack

Question 15

Load factor is calculated by

Answer 15

Lift ÷ Weight

Question 16

In a venturi tube

Answer 16

Static pressure reduces at the constriction

Question 17

What is aircraft equilibrium

Answer 17

Lift = Weight 
Thrust = drag

Question 18

What will happen to parasite drag with increased airspeed

Answer 18

it will increase

Question 19

If Centre of Pressure is behind centre of gravity what couple is produced

Answer 19

a nose down

Question 20

Movement around the lateral axis is called

Answer 20

Pitch

Question 21

Movement around the normal axis is called

Answer 21

Yaw

Question 22

What is an ailerons primary and secondary effects

Answer 22

Primary - roll

Secondary = yaw

Question 23

Directional stability is provided by the

Answer 23

Fin

Question 24

Differential ailerons minimise …..

Answer 24

Adverse yaw

Question 25

What is the secondary effect of rudder

Answer 25

roll

Question 26

Static stbility is when

Answer 26

an aircraft will return to its original condition

Question 27

What is washout

Answer 27

A reduction in angle of attack towards the tip, ensuring the wing root stall first

Question 28

A fixed trim tab or balance tab

Answer 28

is adjusted on the ground after a test flight to ensure laterally level flight

Question 29

The maximum Lift Drag ratio is reached at what angle

Answer 29

4 degrees

Question 30

Trailing edge flaps will ? the stalling angle of attack

Answer 30

reduce

Question 31

On flap extension (all other factors constant) the aircraft will

Answer 31

climb

Question 32

What has the greatest effect on induced drag

Answer 32

wing tip design

Question 33

Anti Balance tabs

Answer 33

ensure control column loads increase with increased deflection

Question 34

control surface flutter can be controlled by

Answer 34

the use of a mass balance

Question 35

At a 60 angle of bank the stall speed increases by

Answer 35

41%

Question 36

What is the manoeuvring load of an aircraft in the utility category

Answer 36

4.4g

Question 37

How do you calculate glide range from glide ratio

Answer 37

Times Height by ratio
Divide answer by 6000
answer is in NM