alex
I agree with you about the aerodynamics efect of retracting flap from 30 to 1 ,but I was told that from flap 15 to 1 the flap is designed to retract slow,so enaugh time to increase speed
- yes it IS a slow retraction, but what speed are you intending to accelerate to?
IMO are we not over-complicating it? Four Trails has it - nice and simple - (except I would beg to differ on the speed - should it not be Vref+20?). It all hinges on the speed you have. If you have accelerated to Vref30/40+20, this is a safe speed for Vref Flap 15 to land, and you can then take Flap 1 if you g/a (as per s/e g/a). If not, then at Vref 30/40+5 you will need to g/a with Flap 15 (as per 2/e g/a) or you will be below V2 Flap 1, and only go Flap 1 when you have Vref 30/40 +20, as per some SOPs in places like Innsbruck and Chambery...............or is it more complicated?