How efficient is aileron droop ?
Had several flights on the small Airbusses this winter and made an interesting observation. After deicing, the aircraft is covered with a thick coat of the green stuff which prevents icing. On the wings and the flaps most of it are already blown away before rotation, and once the gear is up, the wing is clean again. However, the aileron remains fully green until the flaps have been retracted and the ailerons have returned to their neutral position, only a few seconds after, they are clean as well. A litle bit of deicing fluid is still present at the trailing edge of the entire wing, even after an hour of flight, the same happens at the spoilers trailing edge.
So is the airflow over the drooped aileron separated, and how much drag does that cause compared to the increase in lift? How efficient is aileron droop?