Lift

Question 1

Lift =

Answer 1

1/2p S V2 CL

Question 2

Gravity constant is

Answer 2

9.81 m/s2 (rounded to 10 m/s2)

Question 3

Mass is measured in

Answer 3

KG

Question 4

How meany mm in 1M ?

Answer 4

1000

Question 5

Feet in 1M

Answer 5

3.28

Question 6

1nm = ? Feet

Answer 6

6080

Question 7

1sm = ? Feet

Answer 7

5280

Question 8

Work equation

Answer 8

Force x Distance

Question 9

Force equation

Answer 9

Mass x Acceleration

Question 10

Power equation

Answer 10

Work ➗ time

Question 11

KE =

Answer 11

1/2 mV2

M= mass

Question 12

TAS stands for

Answer 12

True Airspeed

Question 13

CAS stands for

Answer 13

Celebrated Airspeed

Question 14

EAS stands for

Answer 14

Equivalent Airspeed

Question 15

How to you work out MACH NO#

Answer 15

TAS ➗ a

a is speed of sound 660 kts

Question 16

How to you work out Dynamic Pressure?

Answer 16

Total pressure - static pressure

Is will give you IAS

Question 17

How do you Work out total Pressure?

Answer 17

Static Pressure + Dynamic Pressure

Question 18

Explain CAS?

Answer 18

CAS is IAS but more accurate as this takes into account position error. And is achieved by an accurate measurement of Dynamic Pressure of significance.

Question 19

Explain EAS

Answer 19

EAS is CAS but allows for the compressibility of air at highs speeds (usually above 300kts or at higher altitudes)

Question 20

1Km in m is?

Answer 20

1000

Question 21

What is the ISA assumed to be?

Answer 21

15”c 
Pressure of 1013.15 hPa
Air density = 1.225 kg/m 3 
Laps rate of 1.98”c / 1000 ft to 36,090 ft
above that constantl temp is 56.5’c

Question 22

CL is the ratio between…

Answer 22

Lift per unit wing area and dynamic pressure.

Question 23

Airflow patter and thus lift and drag will depend on?

Answer 23

Angle of Attack

Aero foil thickness and camber

Air density

Velocity

Question 24

As AOA increases from -4* the leading edge stagnation point moves from…

Answer 24

Upper surface around leading edge to the lower surface.

Question 25

Where does the greatest positive pressure occur?

Answer 25

Leading edge stagnation point where relative flow velocity is 0

Question 26

Form (pressure) drag is the result of the pressure differential between ...

Answer 26

The leading and trailing edge of the aerofoil.

Question 27

CD is the ratio between...

Answer 27

Drag per unit wing area and dynamic pressure

Question 28

Moment equation is...

Answer 28

Force x Distance

Question 29

Decreasing static pressure means

Answer 29

Decreasing air density

Question 30

Difference in kts and m/s

Answer 30

2 kts in 1 m/s

Question 31

As AOA increases what happens to low Pressure peak with CP

Answer 31

Moves forward

Question 32

CL of life formula is

Answer 32

Lift pressure ➗ Dynamic pressures

Question 33

CD is worked out as...

Answer 33

Drag pressure ➗ dynamic pressure

Question 34

For airflows less than M0.4 the AC is at what % of the cord?

Answer 34

25%

Question 35

2 ways changing the pitching moment can be considered?

Answer 35

Moving CP or through fixed AC

Question 36

What is Aerodynamic Centre (AC)

Answer 36

Fixed point on chordline where all changes in magnitude of lift effectively take place

Question 37

Glider L/D radio

Answer 37

25/60

Question 38

Airliner L/D ratio

Answer 38

12 to 20

Question 39

Single engine piston trainer L/D ratio

Answer 39

10 to 15