Hello, I have a few problems with the calculated performance for 777-200LR and 777-300ER (PMDG ), I mean in certain circumstances like a high airport as MMMX the calculations for TO and derate temperature seems to be excessive, maybe TOPER Tool is not taking in consideration the CLIMB gradient limit and only is taking the limitation for runway length. the result of this, it's a over derated take off's with a high speed rotation with a poor climb gradients with no more than 10 degrees of pitch for avoid the stall speed, this is not normal with 30 tons less than the PMTOW, any idea?
Regar