Puzzle me this....
There is more to it, especially with the BLT as the optimium flap will be dependant on other factors you have selected for take off policy in your take off calculations. These can be accessed in the Fleet Management section of the Administration side of the BLT. This allows you to select V1 policy, bleeds policy (including improved clb options), brake type, obstacle criteria, single engine accel altitude plus a few other things. Of course, there are numerous other performance criteria that are set in other parts of the BLT which are all considered in the optimum flap setting.
