While waiting for Randy's pics I wanted to started another thread on this topic since the other thread strayed bit off topic.Modeling N1 fluctuations is great news but moderation is required since as the Virgin DVD shows the fluctuations are small, at least in cruise. Just to give concrete example if we focus on one engine we could see N1 at 67.8 and it would stay this way for a good 30 sec or so. Then the last digit would change to say '9' and after another 10 sec or so it would return to the original 67.8. It would always be either '8' or '9' at the end in this particular example. And I never saw frequency of change exceeding 3 per minute. For whatever it is worth ...Michael J.WinXP-Home SP2,AMD64 3500+,Abit AV8,Radeon X800Pro,36GB Raptor,1GB PC3200,Audigy 2http://www.precisionmanuals.com/images/forum/747400.jpghttp://www.hifisim.com/images/asv_beta_member.jpg

Indeed I am also very impressed by this!I have to say it all sounds like, we all don't really know what will hit us in the very near future.Boaz...

Moderation is already at work ;-) AND is one reason why there are no pictures from me on this yet, but stay tuned while it is being tuned ;D...[h4]Randy J. Smith[/h4]

That sounds like Engine Trim is being modelled - am I correct in this assumption.