Originally Posted by
voice_of_peace
thank you for the reply. as it happens, some data is out there after a search of the internet.
however i was looking for more information from those have tried or operated this climb strategy.
British Airways .....
Boeing 747-400
Climb at: Cost Index 0
Cruise at Cost Index 90...
Boeing 777-200
Climb at: Cost Index 0
Cruise at Cost Index 100
FWIW that is no longer the way it is done at BA now on the 777,and I suspect it is no longer standard on the 744. Given the emphasis the company has given to fuel saving over the last few years I suspect that is because somebody has decided it's not the most efficient way of handling the CI.