Interesting............
Not sure if I should post the contents of a private email, from a fellow ppruner.... but as a Military jet jockey he never considered much about what happens to lower performance machines............ but a later in life career has him in things such as ferrying Islanders.......
........... funny thing is he too has found a similar few knots variation......... and always better with the tail wind component. He just never bothered to find out why until now............ so I am not alone here!
And yes I have EFIS / Air data and Bullethead may have a very valid point also!
All makes for interesting reading!
