Just to put an end to this, the A300-600 is approved for takeoff with the following slat/flap configurations:. .. .15/0. .15/15. .15/20. .. .Doha has one of the worlds longest runways, it therefore stands to reason that the takeoff would be done at 15/0, doing so will allow a greater takeoff weight, which will be translated into either payload or a thrust reduction.. .. .Mutt.