The
airflow is very important for the created amount of lift, because the
areas of the wing where there is not a smooth airflow, so turbulent
air, creates no lift anymore. The point, where there is so much
turbulent air that the area creating lift is too small to held the
aircraft anymore in the air, is called stall. Increasing the angle of
attack(angle of the wing to the airflow) once creates more lift, but
on the other side creates more turbulence in the air. So that if you
increase the angle of attack more and more once your plane will
stall. Laminar airfoils are special airfoils, where the biggest part
is in the middle and not like on normal airfoils at about 25% of the
chord. These airfoils reduce the amount of turbulent air created by
increasing the angle of attack at he beginning, so you get better
lift, but the stall then happens faster and more abrupt then with a
normal airfoil.
