Let's say you're flying at 450KTAS, the expected wind was 50 kts and it's actually only 30 kts.
If the wind was a headwind, you'll gain 5% TAS (420 v 400), whereas if it was a tailwind, you'll lose 4% TAS (480 v 500)......
such statements are pure fun on pprune !
Last edited by aerobat77; 6th Oct 2012 at 22:54.