The Atmosphere Flashcards
1
Q
What is the accepted altitude for the start of the tropopause/end of the troposphere as per the ISA?
A
11km
2
Q
Which two spheres do conventional aircraft usually fly in?
A
- Troposphere
- Stratosphere
3
Q
What is the accepted sea-level temperature and what is the rate at which temperature drops as altitude increases?
A
Avg sea level temperature is 15°C at a rate of -6.5°/km or -2°C/1000ft
4
Q
What is the accepted:
a) Temperature at sea level
b) Pressure at sea level
c) Density at sea level
A
a) 15°C
b) 1013kPa
c) 1.226 kg/m³
5
Q
Why do we have an ISA?
A
- Comparisons of aircraft performance
- Calibrating instruments
6
Q
What temperature is it at the start of the tropopause?
A
-56.5°C
7
Q
What altitude, approximately, does the stratosphere start?
A
30km
