You guys up there would know better than I. What range do you see headwinds? Is it often to see headwinds the entire way when flying back over the big pond?
FedSec it is the average that counts. It would not be normal to see a headwind the entire way. For example there might be a a 20kt headwind for the first 2 hours, 40kt tailwind in the middle for a while then a 130kt headwind for the last four hours. Overall wind component is a headwind.
Todays QF8 has an average component of -17kt and the QF12 -15kt. so noips 10 to 30 is on the money.