Effect of shock stall on coefficients of lift and drag.
A sudden reduction of the lift and an increase in the drag on an airfoil brought about at high Mach numbers by the airflow separation aft of a shock wave. Severe buffeting caused by a turbulent airflow behind the shock wave may also take place. A shock stall can cause control problems when the aircraft is flying from transonic to supersonic speeds. These adverse effects are a function of the wing's geometry. The use of thin supercritical wing sections and swept-back wings are among the more common effective methods of postponing the shock stall to higher speeds. Also called a buffet boundary