Pineteam
According to AB presentation of 2009 How to optimise FMS predictions, the FMS creates two wind models a forecast model based on pilot entries of wind and temp and predicted model based on adjustment of forecast model using current data. From PPOS there is a blending zone till a beyond a few way points. There is a difference in A320 and A330 models. In 320 forecast is beyond first way point in 330 it is till first WPT. There are more differences in climb cruise and descent. The impact on A320 OPT alt can vary upto 2000ft for 5 degree of dela ISA or 30kt delta wind. On A330 it is 1000th for 5 degree variation and 2000ft for 30kts variations
Last edited by vilas; 13th Jan 2016 at 06:38.