Did find the problem, my pushbutton had a to long "pressed in" time (Arcaze io board)
Changed that to a shorter pulse, now it's oke.
Thanks for the help guys, cheers!
On the Stick's "pinky switch" there is a line up brake, not sure if this is for take off only.
i always thought there were no toe brakes, but it seems there is. Anyone?
Noticed that i have to trim very often with the new PFM of the Su27, it keeps pitching up after take off.
But very challenging indeed:)
btw. when you switch to autopilot, look at the navigational buttons on the left panel, they are animated:)