NACA 2421

Thickness: 21.0%
Camber: 2.0%
Trailing edge angle: 42.4o
Lower flatness: 3.8%
Leading edge radius: 4.7%
Efficiency: 38.3
Max CL: 0.501
Max CL angle: 15.0
Max L/D: 7.293
Max L/D angle: 7.5
Max L/D CL: 0.339
Stall angle: 7.5
Zero-lift angle: 4.5