AIR TEMPERATURE

Question 1

Above which Mach nr does compression becomes a problem for temp measuring?

Answer 1

Above M 0,2

Question 2

What’s the definition of SAT?

Answer 2

SAT is “Static Air Temperature”

Question 3

What’s the definition of RAT?

Answer 3

RAT is the SAT plus the ram rise due to adiabatic compression

Question 4

How can Ram rise be calculated?

Answer 4

Ram rise = (TAS/100)2

Question 5

What’s the definition of TAT?

Answer 5

Total Air Temperature

Recovery factor is 1

Question 6

What is TAT used for?

Answer 6

Used to calculate TAS

Is the temp that the wing is experiencing

Question 7

Why is it “wrong” to have TAT displayed in an a/c?

Answer 7

Because the TAT is really RAT
TAT is only when recovery factor is 1
Normally it’s 0,9

Question 8

What is used to measure TAT?

Answer 8

A Rosemount Probe

Question 9

Why is Kelvin a better scale than F or C?

Answer 9

Because there’s no need to change signs

-273 deg C is 0 deg K, which is called Absolute zero