ISA
Moderators: sky's the limit, sepia, Sulako, lilfssister, North Shore, I WAS Birddog
maybe?
I believe ISA assumes 15 degrees C @sea level. Average adiabatic lapse rate is about 2 degrees C/1000 feet above sea level. Thus 10000 feet equals 20 degrees. Thus 15 - 20 degrees = -5 degrees celcius (ISA @ 10,000) Therefore your given temp of 5 degrees is ISA +10.
No guarantees but that is what I recall.
No guarantees but that is what I recall.
Adiabatic refers to change in temperature as the air itself moves up or down, not the change in temperature as you move up through the air mass.
ISA Standard lapse rate is 1.98°C per 1000 feet and ISA standard temperature at sea level is 15°C.
And this post is guaranteed (if its wrong you can have a new one).
ahramin
ISA Standard lapse rate is 1.98°C per 1000 feet and ISA standard temperature at sea level is 15°C.
And this post is guaranteed (if its wrong you can have a new one).
ahramin