Komplettes 737 NGX Tutorial: • PMDG 737 NGX Tutorial Full HD German PART 1
Intel 2600K à 4,5 GHz
8 GB RAM
GTX570 Phantom (Gainward)
Software used:
REX 2.0 OD
A formula on how to calculate ISA Deviation
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ISA deviation = OAT - ISA (International Standard Atmosphere) temperature for the height
ISA = 15 - 1.98 * Hp/1000
but you would normally use 2 in lieu of 1.98.
e.g. planned cruise at pressure height (Hp) 3000 ft. Forecast OAT is 20C.
ISA dev becomes
= 20 - (15 - 2 * 3)
= 20 - (15 - 6)
= 20 - 9
= +11
e.g. 8000 ft and OAT -10
dev is
= -10 - (15 - 2 * 8)
= -10 - (15 - 16)
= -10 - (-1)
= -10 + 1
= -9
(via avsim.com)