Before revision: In fluid dynamics, a stall is a reduction in the lift coefficient generated by a foil as angle of attack increases .Crane, Dale: Dictionary of Aeronautical Terms, third edition, p. 486.
After revision: In fluid dynamics, a stall is a reduction in the lift coefficient generated by a foil as angle of attack exceeds its critical value .Crane, Dale: Dictionary of Aeronautical Terms, third edition, p. 486.