pacplyer
". . . it can't augment loss of a 67,000 lb thrust engine; I should have put in a smiley in there.)
No classics have 67,000 lb thrust motors! Not even Air Force One. The largest engines fitted to the classics is the GE CF-80-C2B, delivering 56,600 lbs thrust. It was fitted to the early -400s. It's enough power to out-climb the classic wing.
If you can find a 747 classic Boeing manual and read it, then you'll get a grip on things.
