Air Temperature Indicators

Question 1

True and Measured Air Temp
SAT
1-What is the formula for Total Air Temperature rise
Recovery Factor
2-what is the formula for Ram Air Temp

Answer 1

1-TAT = SAT(static) + RAM rise
2-RAT = SAT + k RAM rise
Where k is the recovery factor (%of ram rise)

Question 2

What causes the needle to move on a low speed bi-metallic thermometer

Answer 2

The differential expansion of 2 different metals