NACA 6409 airfoil — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/naca-6409-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 8.98
- NACA 6409: 6 % 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  0.854  1.733  1.646  -0.995
2.5  1.969  2.614  3.031  -1.161
5  4.323  3.985  5.677  -1.172
7.5  6.754  5.099  8.246  -1.021
10  9.229  6.051  10.771  -0.801
15  14.261  7.596  15.739  -0.284
20  19.362  8.755  20.638  0.245
25  24.502  9.584  25.498  0.729
30  29.663  10.113  30.337  1.137
40  40.000  10.350  40.000  1.650
50  50.132  9.796  49.868  1.871
60  60.227  8.736  59.773  1.931
70  70.271  7.212  69.729  1.788
80  80.255  5.245  79.745  1.422
90  90.168  2.843  89.832  0.823
95  95.095  1.478  94.905  0.439
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-6409-airfoil/index.json
API: https://xemstudio.com/api/geometry?object=naca-6409-airfoil