NACA M21 AIRFOIL

Thickness: 11.9%
Camber: 6.0%
Trailing edge angle: 26.8o
Lower flatness: 28.3%
Leading edge radius: 3.1%
Efficiency: 37.3
Max CL: 1.446
Max CL angle: 13.0
Max L/D: 30.307
Max L/D angle: 4.0
Max L/D CL: 0.684
Stall angle: -0.5
Zero-lift angle: -3.0