Hudson,
If this is the case, where are they getting the protection for the 5/10 minute takeoff thrust limitation? If they cant be trusted to conducted a checklist and fly, how can they be trusted to watch a clock?
SR71
You are correct in your assumption that if the FRA of 800ft doesnt clear an obstacle the takeoff program will reiterate the calculation until it finds an altitude that will clear the obstacle or it gives you an error!
We had worked on the principle that the ALL ENGINE climb performance is significantly greater than the ENG OUT performance, therefore we had an ENG OUT FRA which was adjusted according to the runway requirements and a standard ALL ENGINE FRA of 1000 ft. Powers that be want to make both of them the same, I'm just investigating the PROS & CONS.
You will extend your projected trapezoid until limited by your engine thrust time limit or as limited by the AFM.
Mutt.