Theory and Practice of Aircraft Performance

APPENDIX FAerofoil Data

The data and figures in this Appendix are provided courtesy of I.R. Abbott and A.E. Von Doenhoff, Theory of Wing Sections.

Throughout, stations and ordinates are given in percentage of aerofoil chord.

NACA 4412

Upper surface		Lower surface
Station	Ordinate	Station	Ordinate
0	0	0	0
1.25	2.44	1.25	−1.43
2.5	3.39	2.5	−1.95
5.0	4.73	5.0	−2.49
7.5	5.76	7.5	−2.74
10	6.59	10	−2.86
15	7.89	15	−2.88
20	8.80	20	−2.74
25	9.41	25	−2.50
30	9.76	30	−2.26
40	9.80	40	−1.80
50	9.19	50	−1.40
60	8.14	60	−1.00
70	6.69	70	−0.65
80	4.89	80	−0.39
90	2.71	90	−0.22
95	1.47	95	−0.16
100	(0.13)	100	(−0.13)
100	–	100	0

LE radius: 1.58.

Slope of radius through LE: 0.20.

NACA 4415

Upper surface		Lower surface
Station	Ordinate	Station	Ordinate
0	–	0	0
1.25	3.07	1.25	−1.79
2.5	4.17	2.5	−2.48
5.0	5.74	5.0	−3.27
7.5	6.91	7.5	−3.71
10	7.84	10	−3.98
15	9.27	15	−4.18
20	10.25	20	−4.15
25	10.92	25	−3.98
30	11.25	30	−3.75
40	11.25	40	−3.25
50	10.53	50	−2.72
60	9.30	60	−2.14
70	7.63	70	−1.55
80	5.55	80	1.03
90	3.08	90	−0.57
95	1.67	95	−0.36
100	(0.16)	100	(−0.16)
100	–	100	0

LE radius: 2.48.

Slope of radius through LE: 0.20.

NACA 23012

Upper surface		Lower surface
Station	Ordinate	Station	Ordinate
0	–	0	0
2.15	2.67	1.25	−1.23
2.5	3.61	2.5	−1.71
5.0	4.91	5.0	−2.26
7.5	5.80	7.5	−2.61
10	6.43	10	−2.92
15	7.19	15	−3.50
20	7.50	20	−3.97
25	7.60	25	−4.28
30	7.55	30	−4.46
40	7.41	40	−4.48
50	6.41	50	−4.17
60	5.47	60	−3.67
70	4.36	70	−3.00
80	3.08	80	−2.16
90	1.68	90	−1.23
95	0.92	95	−0.70
100	(0.13)	100	(−0.13)
100	–	100	0

LE radius: 1.58.

Slope of radius through LE: 0.305.

NACA 65‐410

Upper surface		Lower surface
Station	Ordinate	Station	Ordinate
0	0	0	0
0.372	0.861	0.628	−0.661
0.607	1.061	0.893	−0.784
1.089	1.372	1.411	−0.944
2.318	1.935	2.682	−1.191
4.797 ...