◆ Special definitions C lift coefficient a angle of attack ao lift slope Lmax Maximum lift coefficient al-o zero-lift attack angle stall Consequence of the flow separation It is impossible for we to calculate c ma with inviscid flow approximation!!Special definitions l c  a0 l,max c  L0 stall lift coefficient angle of attack lift slope Maximum lift coefficient zero-lift attack angle Consequence of the flow separation It is impossible for we to calculate with inviscid flow approximation!! l,max c