PPRuNe Forums - View Single Post - Temperature error correction

3rd November 2011 | 02:38

#4 (permalink)

reynoldsno1

Joined: Jan 2000

Posts: 1,415

Likes: 90

Rule of thumb is 4ft per 1000ft above AD per AD temp degree of difference from ISA

i.e. AD @ 1000ft amsl @ 0C w/FAP at 3000ft alt

FAP height = 2000ft
AD ISA temp = 13C, so difference from ISA = -13
Temp error = 4 x 2 x 13 = -104ft (underread)

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