NACA 4409 airfoil — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/naca-4409-airfoil/  (sheet CC BY 4.0; files Xem Studio Design License, https://xemstudio.com/license/)
Basis: Computed from the NACA equations (Report 460 / Report 610, restated in NASA TM-4741)
Catalog version: 2026-10-20

Overall (mm): length 100.0, width 20.0, height 8.99
- NACA 4409: 4 % camber at 40 % chord, 9 % thick.
- NACA 4-digit: first digit = maximum camber in % of chord, second = its position in tenths of chord, last two = maximum thickness in % of chord (NACA Report 460).
- Ordinates are in % of chord from the leading edge, computed from the published equations with the closed-trailing-edge thickness coefficient (−0.1036, as in NASA TM-4741). The original reports use an open trailing edge (−0.1015); the difference is under 0.03 % of chord near the trailing edge.
- The file is a 100 mm chord section, 20 mm deep: scale it uniformly to your chord, or import the STEP and sweep or loft it into a wing. Thickness scales with chord; the shape is the same at any size.

x (% chord)  upper x  upper y  lower x  lower y
0  0.000  0.000  0.000  0.000
1.25  0.980  1.641  1.520  -1.148
2.5  2.139  2.412  2.861  -1.443
5  4.540  3.564  5.460  -1.689
7.5  6.995  4.469  8.005  -1.750
10  9.479  5.223  10.521  -1.723
15  14.503  6.415  15.497  -1.540
20  19.572  7.282  20.428  -1.282
25  24.667  7.881  25.333  -1.006
30  29.775  8.245  30.225  -0.745
40  40.000  8.350  40.000  -0.350
50  50.088  7.853  49.912  -0.075
60  60.151  6.962  59.849  0.149
70  70.181  5.719  69.819  0.281
80  80.171  4.143  79.829  0.301
90  90.113  2.240  89.887  0.205
95  95.064  1.163  94.936  0.115
100  100.000  -0.000  100.000  0.000

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- NACA (NASA Technical Reports Server): Report 460: The characteristics of 78 related airfoil sections from tests in the variable-density wind tunnel (Jacobs, Ward, Pinkerton, 1933) — web — Publisher's page; dimensions are facts — https://ntrs.nasa.gov/citations/19930091108
- NASA: TM-4741: Computer program to obtain ordinates for NACA airfoils (Ladson, Brooks, Hill, Sproles, 1996) — web — Publisher's page; dimensions are facts — https://www.pdas.com/refs/tm4741.pdf

Free files (Xem Studio Design License, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/naca-4409-airfoil/index.json
API: https://xemstudio.com/api/geometry?object=naca-4409-airfoil