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Flashcards in Principles of Flight Deck (37)
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1

The international standard atmosphere sets out....

Theoretical values for temperature, pressure and density at all levels

2

The lapse rate for ISA is

2 degrees for 1000 feet

3

The main constituents of the earths atmosphere are

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

4

The ratio of Nitrogen to Oxygen is

1:4

5

The troposphere is characterised by a...

decrease in temperature with increasing altitude

6

How is density related to pressure

Proportional to pressure
Inversely proportional to temperature

7

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

cause the density to increase

8

The coefficient of lift is at its maximum

just before the stall angle

9

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

Quadruple

10

The angle of attack is measured between

The chord line and relative air flow

11

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

increase in speed

12

Induced drag ? as airspeed increases

decreases

13

In a stall where does flow separation begin

Upper surface trailing edge

14

A slat will ...

Delay the stall until a higher angle of attack

15

Load factor is calculated by

Lift ÷ Weight

16

In a venturi tube

Static pressure reduces at the constriction

17

What is aircraft equilibrium

Lift = Weight
Thrust = drag

18

What will happen to parasite drag with increased airspeed

it will increase

19

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

a nose down

20

Movement around the lateral axis is called

Pitch

21

Movement around the normal axis is called

Yaw

22

What is an ailerons primary and secondary effects

Primary - roll
Secondary = yaw

23

Directional stability is provided by the

Fin

24

Differential ailerons minimise .....

Adverse yaw

25

What is the secondary effect of rudder

roll

26

Static stbility is when

an aircraft will return to its original condition

27

What is washout

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

28

A fixed trim tab or balance tab

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

29

The maximum Lift Drag ratio is reached at what angle

4 degrees

30

Trailing edge flaps will ? the stalling angle of attack

reduce