Leading Edge Slats on the Me-109

[lonewulf]

The slats were spring loaded and extended or retracted depending on the amount of air pressure being exerted on the leading edge. If you suddenly stalled one wing the slat on that wing might extend suddenly but typically they would extend gradually as airspeed dropped below 200k.

Because the slats could extend asymmetrically, this could result in an uneven airflow over the wings.