Plugged in the following for a GE CF6-50E2 (51,800lbs rated thrust) 747
BRU RWY 20 +20C QNH1000 5 Tail and 306,000kg
Came out with Max thrust 112.7 %N1
Flap 20
V1 133
VR 144
V2 158
Also allowed for an addition 30,000kg to be carried.
What's the rated thrust of the Pratts fitted to the actual A/C?