Thanks gentlemen for your input.
Those who answered higher altitude are correct in what I am trying to do. Those of you that currently fly the flaps 20 takeoffs certainly know why.
I am going to the sim.
None of you answered about your feelings on how it might make you feel as a pilot. I am very interested in that.
You gents get allot of time to think about flying. I think a great contest would be for a pilot to define the best flight configuration and parameters at MTOW for 747-400 to put it at the highest altitude possible at cutback.
Is that workable?
Could be cool??