NACA 0021

Thickness: 20.9%
Camber: 0.0%
Trailing edge angle: 35.9o
Lower flatness: 3.8%
Leading edge radius: 5.9%
Efficiency: 47.6
Max CL: 1.197
Max CL angle: 15.0
Max L/D: 28.271
Max L/D angle: 8.5
Max L/D CL: 0.89
Stall angle: 4.5
Zero-lift angle: 0.0