fonseca
hello B
I hope this will help.
Balanced Field Lenght "ACCEL-GO = ACCEL-STOP"
Accelerate-stop distance-is the dsitance required to:
-accelerate with all engine operating
-have a engine fail at Vef
-the engine fails at least one second before V1
-recognize the failure
-put the airplane in a configuration for stopping
-stop the airplane with the use of maximum wheel brakes with the speedbrakes extended.