AIR, ATMOSPHERE + AIRSPEED

Question 1

Define invicid

Answer 1

No viscosity

Question 2

What shows an acceleration of air on an airflow diagram?

Answer 2

The air flows bending or becoming closer together

Question 3

Give the equation for mass flow

Answer 3

Mass flow ∝ AVρ

Question 4

Give the equation for air density

Answer 4

Air density ∝ P/T

Question 5

Name 4 factors that cause air density to decrease

Answer 5

These factors INCREASING:

• Humidity
• Viscosity
• Temperature
• Speed

Question 6

What does IAS stand for?

Answer 6

Indicated Airspeed

Question 7

What does CAS stand for?

Answer 7

Calibrated Airspeed

Question 8

What does EAS stand for?

Answer 8

Equivalent Airspeed

Question 9

What does EAS stand for?

Answer 9

True Airspeed

Question 10

Give the equation relating TAS and EAS

Answer 10

TAS = EAS x √(ρ0/ρ)

Question 11

Draw the flow diagram of airspeed problems

Answer 11

IAS
                        Pitot
CAS
                        Compression                           
EAS
                        Density
TAS

Just remember:
ICE T Pretty Cool Drink

Question 12

What is another name for the local speed of sound (L.S.S.)

Answer 12

Mach 1

Question 13

What is the equation for L.S.S?

Answer 13

L.S.S. = 38.94 x √T

38.94 - can be rounded to 39
T in Kelvin

Question 14

Give an equation to find Mach from TAS and L.S.S.

Answer 14

Mach = TAS/L.S.S

Question 15

EAS^2 ∝ ρ = 1/2(TAS^2)

Answer 15

Remember?