Thanks very much for the info N1 Vibes, very interesting to hear that.
I'm not actually a pilot at the moment, but very much intend to fly. At the moment I'm studying for a degree in Aeronautical
Engineering in Bristol.
I assume these "oscillations" are doing very much for the fuel burn figs.!
Does the A340-500 have the same problem, bearing in mind they also use the Trent 500?
Thanks very much.
Regards