Originally Posted by
Fursty Ferret
There isn't a fuel penalty from using a tailwind calculation, it actually saves fuel as you get to thrust reduction altitude faster. The cost is in the engine wear.
I didn’t say there was. The word I used was efficiency, which admittedly could have been more explicit that I was referring to costs related to engine wear but I thought that would have been inferred when I said it’s not just (discretionary) fuel. I’m talking about people being wasteful in other areas and yes there will be the odd occasion where it’s justified but believe me there’s a hell of a lot more when it’s not.