Originally Posted by
MD83FO
In headwind conditions, how fast would you say it is advisable to move the thrust levers to FLX detent after stabilization at 50percent?
I don't think there's any guidance, just do it as fast as you like. Uneven acceleration is taken care of by the initial stabilisation then the FADEC will ensure the engines accelerate at an appropriate rate to take-off thrust. There is guidance for a strong crosswind, but that's not what you asked.