I'm converting to A380 and looking for a rule of thumb for the required distance in DES planning. Has anyone got any ideas?
Currently I use my A340 formulas which are ...
(height X 3) + 20 kts when DES speed is 300 kts
(height X 3) + 10 kts when DES speed is 250 kts
(height X 3) + 5 kts when speed is at green dot
I think it's not quite work as my DES profile always ends up too high (LDG weight approx 370 T) and cant capture G/S without speedbrake
